1999 |
Makridis, P; Vadstein, O Food size selectivity of Artemia franciscana at three developmental stages Journal Article Journal of Plankton Research, 21 (11), pp. 2191–2201, 1999, ISSN: 14643774. @article{makridis_food_1999, title = {Food size selectivity of Artemia franciscana at three developmental stages}, author = {P Makridis and O Vadstein}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0032698922&partnerID=40&md5=99fcdd04e89d1cdd683521fdf8f7e82f}, doi = {10.1093/plankt/21.11.2191}, issn = {14643774}, year = {1999}, date = {1999-01-01}, journal = {Journal of Plankton Research}, volume = {21}, number = {11}, pages = {2191--2201}, abstract = {Food size selectivity was examined in Artemia franciscana metanauplii at three different developmental stages. Clearance rates were determined in short-term experiments either by measuring the decrease in concentration of live particles and plastic beads, or by measuring the radioactivity accumulated in animals that grazed 14C-labelled live particles. The maximum clearance rate of A.franciscana metanauplii increased during development and was measured at 50-63 μl ind.-1 h-1, 254 μl ind.-1 h-1 and 1.48-2.10 ml ind.-1 h-1 in 2-, 4- and 7-day-old metanauplii, respectively. A preference for particles with a diameter of 4-8 μm was observed at all three developmental stages. The ability of A. franciscana metanauplii to graze bacterial particles was also demonstrated, although the efficiency in grazing such small particles was low compared to microalgae (28, 20 and 9% of the maximum clearance rate in 2-, 4- and 7-day-old metanauplii, respectively). Electron microscopy showed that the inter-setular distance in antennae and thoracopods was 0.20 ± 0.07, 0.16 ± 0.05 and 0.18 ± 0.04 μm in 2-, 4- and 7-day-old metanauplii, respectively, and accordingly independent of stage.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Food size selectivity was examined in Artemia franciscana metanauplii at three different developmental stages. Clearance rates were determined in short-term experiments either by measuring the decrease in concentration of live particles and plastic beads, or by measuring the radioactivity accumulated in animals that grazed 14C-labelled live particles. The maximum clearance rate of A.franciscana metanauplii increased during development and was measured at 50-63 μl ind.-1 h-1, 254 μl ind.-1 h-1 and 1.48-2.10 ml ind.-1 h-1 in 2-, 4- and 7-day-old metanauplii, respectively. A preference for particles with a diameter of 4-8 μm was observed at all three developmental stages. The ability of A. franciscana metanauplii to graze bacterial particles was also demonstrated, although the efficiency in grazing such small particles was low compared to microalgae (28, 20 and 9% of the maximum clearance rate in 2-, 4- and 7-day-old metanauplii, respectively). Electron microscopy showed that the inter-setular distance in antennae and thoracopods was 0.20 ± 0.07, 0.16 ± 0.05 and 0.18 ± 0.04 μm in 2-, 4- and 7-day-old metanauplii, respectively, and accordingly independent of stage. |
Rigos, G; Alexis, M; Nengas, I Leaching, palatability and digestibility of oxytetracycline and oxolinic acid included in diets fed to seabass Dicentrarchus labrax L. Journal Article Aquaculture Research, 30 , pp. 841 – 847, 1999. @article{rigos_leaching_1999, title = {Leaching, palatability and digestibility of oxytetracycline and oxolinic acid included in diets fed to seabass Dicentrarchus labrax L.}, author = {G Rigos and M Alexis and I Nengas}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033385354&partnerID=40&md5=b697c8b14ba6b9a0fe7b97acc49786f2}, year = {1999}, date = {1999-01-01}, journal = {Aquaculture Research}, volume = {30}, pages = {841 -- 847}, abstract = {The leaching of oxolinic acid (OA) and oxytetracycline (OTC) from medicated feeds, as well as the palatability and digestibility of these drugs were investigated in seabass Dicentrarchus labrax L. (350g) at 16°C and 24°C water temperature. Oil- coated OA and OTC on feeds were greatly affected by leaching at 16 °C (losses of 55.5% and 42.5% for OA and OTC respectively) and 24 °C (32% for OA and 47% for OTC). However, a significant reduction in drug loss resulting from leaching was evident when the antibiotics were mixed with the diet at 16°C (5% for OA and 6.5% for OTC) and 24°C (10% and 20% for OA and OTC respectively). Increased water temperature induced a significant effect on the leaching of both drugs when mixed with the feed, but did not affect the loss of oil-coated drugs. There was a significant reduction in feed consumption of fish fed a diet with oil-coated OTC (90% and 92% at 16°C and 24°C respectively), whereas intake of feed containing oil-coated OA was only slightly affected (10% at 16 °C, 12% at 24 °C). The depressed palatability of feeds containing oil-coated OTC was overcome by mixing the drug with the diet. Both antibiotics were well digested by seabass (94% and 85% for OA and OTC respectively) at 24°C; however, more than one-third of each drug was recovered in the faeces at 16 °C (64% and 59% for OA and OTC respectively). The significance of these findings for the interaction between fish therapy and marine environment is stressed.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The leaching of oxolinic acid (OA) and oxytetracycline (OTC) from medicated feeds, as well as the palatability and digestibility of these drugs were investigated in seabass Dicentrarchus labrax L. (350g) at 16°C and 24°C water temperature. Oil- coated OA and OTC on feeds were greatly affected by leaching at 16 °C (losses of 55.5% and 42.5% for OA and OTC respectively) and 24 °C (32% for OA and 47% for OTC). However, a significant reduction in drug loss resulting from leaching was evident when the antibiotics were mixed with the diet at 16°C (5% for OA and 6.5% for OTC) and 24°C (10% and 20% for OA and OTC respectively). Increased water temperature induced a significant effect on the leaching of both drugs when mixed with the feed, but did not affect the loss of oil-coated drugs. There was a significant reduction in feed consumption of fish fed a diet with oil-coated OTC (90% and 92% at 16°C and 24°C respectively), whereas intake of feed containing oil-coated OA was only slightly affected (10% at 16 °C, 12% at 24 °C). The depressed palatability of feeds containing oil-coated OTC was overcome by mixing the drug with the diet. Both antibiotics were well digested by seabass (94% and 85% for OA and OTC respectively) at 24°C; however, more than one-third of each drug was recovered in the faeces at 16 °C (64% and 59% for OA and OTC respectively). The significance of these findings for the interaction between fish therapy and marine environment is stressed. |
Kotzabasis, K; Hatziathanasiou, A; Bengoa-Ruigomez, M V; Kentouri, M; Divanach, P Progress in Industrial Microbiology, 35 , pp. 357–362, Elsevier, 1999, ISBN: 978-0-444-50387-9. @incollection{kotzabasis_methanol_1999, title = {Methanol as alternative carbon source for quicker efficient production of the microalgae Chlorella minutissima: Role of the concentration and frequence of administration}, author = {K Kotzabasis and A Hatziathanasiou and M V Bengoa-Ruigomez and M Kentouri and P Divanach}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0079635299801283}, doi = {10.1016/S0079-6352(99)80128-3}, isbn = {978-0-444-50387-9}, year = {1999}, date = {1999-01-01}, urldate = {2020-08-18}, booktitle = {Progress in Industrial Microbiology}, volume = {35}, pages = {357--362}, publisher = {Elsevier}, abstract = {Autotrophic cultures of the marine microalgae Chlorella minutissima were performed at 13 000 lux continuous illumination in 11 chambers fertilised with 0.25 g l - 1 F2 medium and different doses of methanol. This was administered in two ways during two parallel experimental series of 10 days: 0.05, 0.1, 0.5, 1.0 and 5.0% methanol (v/v) in one unique dose at the beginning of the culture and 110 of these (i.e. 0.005, 0.01, 0.05, 0.1 and 0.5% methanol (v/v)) in daily doses for the 10-day culture period. Low concentrations of methanol induced a faster increase of cell density and dry weight than control, while high concentrations induced symptoms of toxicity. The higher cell densities and quicker growth were observed in the experiments with daily administration of 0.005 and 0.1% (v/v) methanol, while those with one dose presented an initial boosted growth but a final cell density lower than control. The role of methanol as alternative carbon source for microalgae, as well as its possible impact on the quality of biomass production and on the environment, are discussed. © 1999 Elsevier B.V. All rights reserved.}, keywords = {}, pubstate = {published}, tppubtype = {incollection} } Autotrophic cultures of the marine microalgae Chlorella minutissima were performed at 13 000 lux continuous illumination in 11 chambers fertilised with 0.25 g l - 1 F2 medium and different doses of methanol. This was administered in two ways during two parallel experimental series of 10 days: 0.05, 0.1, 0.5, 1.0 and 5.0% methanol (v/v) in one unique dose at the beginning of the culture and 110 of these (i.e. 0.005, 0.01, 0.05, 0.1 and 0.5% methanol (v/v)) in daily doses for the 10-day culture period. Low concentrations of methanol induced a faster increase of cell density and dry weight than control, while high concentrations induced symptoms of toxicity. The higher cell densities and quicker growth were observed in the experiments with daily administration of 0.005 and 0.1% (v/v) methanol, while those with one dose presented an initial boosted growth but a final cell density lower than control. The role of methanol as alternative carbon source for microalgae, as well as its possible impact on the quality of biomass production and on the environment, are discussed. © 1999 Elsevier B.V. All rights reserved. |
Petihakis, G; Triantafyllou, G; Koutsoubas, D; Allen, I; Dounas, C Modelling the annual cycles of nutrients and phytoplankton in a Mediterranean lagoon (Gialova, Greece) Journal Article Marine Environmental Research, 48 (1), pp. 37–58, 1999, ISSN: 01411136. @article{petihakis_modelling_1999, title = {Modelling the annual cycles of nutrients and phytoplankton in a Mediterranean lagoon (Gialova, Greece)}, author = {G Petihakis and G Triantafyllou and D Koutsoubas and I Allen and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032962205&doi=10.1016%2fS0141-1136%2899%2900031-8&partnerID=40&md5=8fed2e52e84b89476fe2f603648f92d2}, doi = {10.1016/S0141-1136(99)00031-8}, issn = {01411136}, year = {1999}, date = {1999-01-01}, journal = {Marine Environmental Research}, volume = {48}, number = {1}, pages = {37--58}, abstract = {Nutrient dynamics for phosphate, nitrate, ammonium and silicate have been simulated with the European Regional Seas Ecosystem Model in a Mediterranean lagoon. This generic model designed for the open sea can be usefully applied also to coastal lagoon ecosystems with minimum modifications. The annual cycles of the nutrients phosphate and silicate compare guile well with the observed ranges of variability. This does not hold for ammonium and nitrate where the increased concentrations could be attributed to external inputs from the land. Nutrient budgets calculated from the model results indicate some competition between phytoplankton and bacteria for nutrients, a common characteristic of lagoons. To further develop the model, an adaptation of the phytoplankton submodel to represent benthic primary production, as well as the modification of the benthic nutrient model to cope with anoxic events are suggested.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Nutrient dynamics for phosphate, nitrate, ammonium and silicate have been simulated with the European Regional Seas Ecosystem Model in a Mediterranean lagoon. This generic model designed for the open sea can be usefully applied also to coastal lagoon ecosystems with minimum modifications. The annual cycles of the nutrients phosphate and silicate compare guile well with the observed ranges of variability. This does not hold for ammonium and nitrate where the increased concentrations could be attributed to external inputs from the land. Nutrient budgets calculated from the model results indicate some competition between phytoplankton and bacteria for nutrients, a common characteristic of lagoons. To further develop the model, an adaptation of the phytoplankton submodel to represent benthic primary production, as well as the modification of the benthic nutrient model to cope with anoxic events are suggested. |
Rigos, G; Christophilogiannis, P; Yiagnisi, M; Andriopoulou, A; Koutsodimou, M; Nengas, I; Alexis, M Myxosporean infections in Greek mariculture Journal Article Aquaculture International, 7 , pp. 361 – 364, 1999. @article{rigos_myxosporean_1999, title = {Myxosporean infections in Greek mariculture}, author = {G Rigos and P Christophilogiannis and M Yiagnisi and A Andriopoulou and M Koutsodimou and I Nengas and M Alexis}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033512619&partnerID=40&md5=b36f94c8f28917da682199a49d768f7b}, year = {1999}, date = {1999-01-01}, journal = {Aquaculture International}, volume = {7}, pages = {361 -- 364}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Pavlidis, M; Berry, M; Kokkari, C; Kentouri, M Prothrombin time, activated partial thromboplastin time and fibrinogen values in Mediterranean marine teleosts Journal Article Fish Physiology and Biochemistry, 21 (4), pp. 335–343, 1999, ISSN: 09201742. @article{pavlidis_prothrombin_1999, title = {Prothrombin time, activated partial thromboplastin time and fibrinogen values in Mediterranean marine teleosts}, author = {M Pavlidis and M Berry and C Kokkari and M Kentouri}, url = {http://link.springer.com/10.1023/A:1007882020754}, doi = {10.1023/A:1007882020754}, issn = {09201742}, year = {1999}, date = {1999-01-01}, urldate = {2020-08-18}, journal = {Fish Physiology and Biochemistry}, volume = {21}, number = {4}, pages = {335--343}, abstract = {Coagulation profiles for marine fish were determined with the standard global screening assays, the prothrombin time (PT) and activated partial thromboplastin time (APTT) using homologous tissue thromboplastin and phospholipid extracts to investigate species-specificity of brain thromboplastins, and to establish a base-line coagulation profile for marine fish of economical importance for Mediterranean aquaculture (sea bream, Sparus aurata, sea bass, Dicentrarchus labrax, red porgy, Pagrus pagrus, common dentex, Dentex dentex). Sea bass and sea bream displayed the shortest PT (9.0-15.0 s) and APTT (22.1-35.8 s) in comparison to the other species (PT: 24.8-37.2 s, APTT: 39.6-66.4 s). Red porgy displayed the lowest fibrinogen value (1.2-2.3 g 1 -1), while no differences were found among the other species (2.2-2.8 g 1 -1). It is concluded that the interaction of the tissue factor and plasma clotting factor is relatively species specific and that the use of homologous brain extracts is preferable for haemostasis study in marine fish.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Coagulation profiles for marine fish were determined with the standard global screening assays, the prothrombin time (PT) and activated partial thromboplastin time (APTT) using homologous tissue thromboplastin and phospholipid extracts to investigate species-specificity of brain thromboplastins, and to establish a base-line coagulation profile for marine fish of economical importance for Mediterranean aquaculture (sea bream, Sparus aurata, sea bass, Dicentrarchus labrax, red porgy, Pagrus pagrus, common dentex, Dentex dentex). Sea bass and sea bream displayed the shortest PT (9.0-15.0 s) and APTT (22.1-35.8 s) in comparison to the other species (PT: 24.8-37.2 s, APTT: 39.6-66.4 s). Red porgy displayed the lowest fibrinogen value (1.2-2.3 g 1 -1), while no differences were found among the other species (2.2-2.8 g 1 -1). It is concluded that the interaction of the tissue factor and plasma clotting factor is relatively species specific and that the use of homologous brain extracts is preferable for haemostasis study in marine fish. |
Tselepides, A; Akoumianaki, I; Papadopoulou, K -N; Podaras, D; Plaiti, W; Tholosan, O Seasonal variability and distribution of organic matter in surface and subsurface sediments of the Aegean Sea. Inproceedings Perpignan, France, 1999, (Publication Title: The 4th MTP workshop- MATER). @inproceedings{tselepides_seasonal_1999, title = {Seasonal variability and distribution of organic matter in surface and subsurface sediments of the Aegean Sea.}, author = {A Tselepides and I Akoumianaki and K -N Papadopoulou and D Podaras and W Plaiti and O Tholosan}, year = {1999}, date = {1999-01-01}, address = {Perpignan, France}, note = {Publication Title: The 4th MTP workshop- MATER}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Navajas, M; Lagnel, J; Fauvel, G; Moraes, De G Sequence variation of ribosomal Internal Transcribed Spacers (ITS) in commercially important Phytoseiidae mites Journal Article Experimental and Applied Acarology, 23 , pp. 851 – 859, 1999. @article{navajas_sequence_1999, title = {Sequence variation of ribosomal Internal Transcribed Spacers (ITS) in commercially important Phytoseiidae mites}, author = {M Navajas and J Lagnel and G Fauvel and G De Moraes}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033226612&partnerID=40&md5=80cdc7f31aeda6c5bbf3e383924720ff}, year = {1999}, date = {1999-01-01}, journal = {Experimental and Applied Acarology}, volume = {23}, pages = {851 -- 859}, abstract = {Preliminary work is needed to assess the usefulness of different markers at different taxonomic scales when a new group is analyzed, such as the commercially important Phytoseiidae mites. We investigate here the level of sequence variation of the nuclear ribosomal spacers ITS 1 and 2 and the 5.8S gene in six species of Phytoseiidae: Neoseiulus californicus, N. fallacis, Euseius concordis, Metaseiulus occidentalis. Typhlodromus pyri and Phytoseiulus persimilis. As expected, the 5.8S gene (148 base pairs) is markedly conserved and displays little variation in between genera comparisons. ITS1 and ITS2 show contrasting patterns: while the ITS2 is short (80-89 bp) and shows little variation, the ITS1 is longer (303-404 bp) and is very variable in sequence. This fact compromises reliable nucleotide homologies when comparing the genera. The comparison of ITS1 sequence similarity at the species level might be useful for species identification, however, the value of ITS in taxonomic studies does not extend to the level of the family. The intraspecific variations of ITS were investigated in three species: N. californicus, N. fallacis and E. concordis. The first species has identical ITS1 sequences and the last two display low polymorphism (2 nucleotide substitutions). The ITS2 and 5.8S sequences were identical in all three subspecies comparisons.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Preliminary work is needed to assess the usefulness of different markers at different taxonomic scales when a new group is analyzed, such as the commercially important Phytoseiidae mites. We investigate here the level of sequence variation of the nuclear ribosomal spacers ITS 1 and 2 and the 5.8S gene in six species of Phytoseiidae: Neoseiulus californicus, N. fallacis, Euseius concordis, Metaseiulus occidentalis. Typhlodromus pyri and Phytoseiulus persimilis. As expected, the 5.8S gene (148 base pairs) is markedly conserved and displays little variation in between genera comparisons. ITS1 and ITS2 show contrasting patterns: while the ITS2 is short (80-89 bp) and shows little variation, the ITS1 is longer (303-404 bp) and is very variable in sequence. This fact compromises reliable nucleotide homologies when comparing the genera. The comparison of ITS1 sequence similarity at the species level might be useful for species identification, however, the value of ITS in taxonomic studies does not extend to the level of the family. The intraspecific variations of ITS were investigated in three species: N. californicus, N. fallacis and E. concordis. The first species has identical ITS1 sequences and the last two display low polymorphism (2 nucleotide substitutions). The ITS2 and 5.8S sequences were identical in all three subspecies comparisons. |
J., Iliopoulou-Georgudaki; P., Kaspiris; V., Kantzaris; Katharios, P Study of the seasonal fluctuation of the ecological quality of the Rivers: Kalamas, Acherontas, Alfios, Pinios with the use of benthic macro-invertebrates as bioindicators. Inproceedings of Sciences, Hellenic Society Biological (Ed.): 21st Conference of the Hellenic Society of Biological Sciences, pp. 91–92, Syros, Greece, 1999. @inproceedings{iliopoulou-georgudaki_study_1999, title = {Study of the seasonal fluctuation of the ecological quality of the Rivers: Kalamas, Acherontas, Alfios, Pinios with the use of benthic macro-invertebrates as bioindicators.}, author = {Iliopoulou-Georgudaki J. and Kaspiris P. and Kantzaris V. and P Katharios}, editor = {Hellenic Society Biological of Sciences}, year = {1999}, date = {1999-01-01}, booktitle = {21st Conference of the Hellenic Society of Biological Sciences}, pages = {91--92}, address = {Syros, Greece}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Tsigenopoulos, C S; Karakousis, Y; Berrebi, P The North Mediterranean Barbus lineage : phylogenetic hypotheses and taxonomic implications based on allozyme data Journal Article Journal of Fish Biology, 54 (2), pp. 267–286, 1999. @article{tsigenopoulos_north_1999, title = {The North Mediterranean Barbus lineage : phylogenetic hypotheses and taxonomic implications based on allozyme data}, author = {C S Tsigenopoulos and Y Karakousis and P Berrebi}, year = {1999}, date = {1999-01-01}, journal = {Journal of Fish Biology}, volume = {54}, number = {2}, pages = {267--286}, abstract = {Systematics of the European species of the genus textitBarbus is controversial for decades because of the relative similarity in general morphology between species. The use of more objective and precise characters, such as osteology, has given improved results. However, in the absence of a thorough morphological analysis of the group, genetic markers providing a promising method for obtaining more accurate phylogenies.On the basis of distinct ecological and morphological characters, the European textitBarbus taxa have been clustered in two groups : a fluvio-lacustrinetextittextless/itextgreaterand a rheophilic or strictly riverine one. These two groups (or ecophenotypes) were recognised in different parts of Europe, and formed, either a species assemblage (textlessitextgreaterBarbus barbus group) or a polytypic species (textitBarbus meridionalis). The implicit idea is that species of to the same group belong, to the same phylogenetic lineage (clade) and are the result of the same transcontinental colonisation event.The analysis, using allozyme markers, of 10 taxa of the genus textitBarbus from France, Italy, Greece, the Czech Republic and Slovakia, showed that the taxa thought to belong to the fluvio-lacustrine and the rheophilic groups are not monophyletic. We mention some alternative hypotheses, including the possibility that the allozyme markers may be inadequate. The results suggest that probably in each sub-region, the founding taxon has diverged independently to form species of two different ecophenotypes ; one occupying the upstream rivers and another found in the lowland rivers. Accordingly, textitBarbus species groups represent clusters of morphologically convergent taxa living in equivalent biotopes}, keywords = {}, pubstate = {published}, tppubtype = {article} } Systematics of the European species of the genus textitBarbus is controversial for decades because of the relative similarity in general morphology between species. The use of more objective and precise characters, such as osteology, has given improved results. However, in the absence of a thorough morphological analysis of the group, genetic markers providing a promising method for obtaining more accurate phylogenies.On the basis of distinct ecological and morphological characters, the European textitBarbus taxa have been clustered in two groups : a fluvio-lacustrinetextittextless/itextgreaterand a rheophilic or strictly riverine one. These two groups (or ecophenotypes) were recognised in different parts of Europe, and formed, either a species assemblage (textlessitextgreaterBarbus barbus group) or a polytypic species (textitBarbus meridionalis). The implicit idea is that species of to the same group belong, to the same phylogenetic lineage (clade) and are the result of the same transcontinental colonisation event.The analysis, using allozyme markers, of 10 taxa of the genus textitBarbus from France, Italy, Greece, the Czech Republic and Slovakia, showed that the taxa thought to belong to the fluvio-lacustrine and the rheophilic groups are not monophyletic. We mention some alternative hypotheses, including the possibility that the allozyme markers may be inadequate. The results suggest that probably in each sub-region, the founding taxon has diverged independently to form species of two different ecophenotypes ; one occupying the upstream rivers and another found in the lowland rivers. Accordingly, textitBarbus species groups represent clusters of morphologically convergent taxa living in equivalent biotopes |
Carrillo, J; Martinez, J; Divanach, P; Kentouri, M Unilateral eye abnormalities in reared Mediterranean gilthead sea bream Journal Article Veterinary Record, 145 , pp. 494 – 497, 1999. @article{carrillo_unilateral_1999, title = {Unilateral eye abnormalities in reared Mediterranean gilthead sea bream}, author = {J Carrillo and J Martinez and P Divanach and M Kentouri}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0033598482&partnerID=40&md5=3137530bf8b7e7dcb44d7cc2eae77911}, doi = {http://dx.doi.org/10.1136/vr.145.17.494}, year = {1999}, date = {1999-01-01}, journal = {Veterinary Record}, volume = {145}, pages = {494 -- 497}, abstract = {Eye abnormalities in reared gilthead sea bream (Sparus aurato) were investigated clinically and by histological techniques. A significant number of fish had a cataract in one eye and ocular inflammation including gross exophthalmos. In a small number of fish gas bubbles were observed in the anterior chamber of the eye. Histological examination provided no evidence of an infectious process and a possible behavioural aetiology is discussed.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Eye abnormalities in reared gilthead sea bream (Sparus aurato) were investigated clinically and by histological techniques. A significant number of fish had a cataract in one eye and ocular inflammation including gross exophthalmos. In a small number of fish gas bubbles were observed in the anterior chamber of the eye. Histological examination provided no evidence of an infectious process and a possible behavioural aetiology is discussed. |
1998 |
Rueda, F M; Martinez, F J; Zamora, S; Kentouri, M; Divanach, P Effect of fasting and refeeding on growth and body composition of red porgy, Pagrus pagrus L.* Journal Article Aquaculture Research, 29 (6), pp. 447–452, 1998, ISSN: 1355-557X, 1365-2109. @article{rueda_effect_1998, title = {Effect of fasting and refeeding on growth and body composition of red porgy, Pagrus pagrus L.*}, author = {F M Rueda and F J Martinez and S Zamora and M Kentouri and P Divanach}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1046/j.1365-2109.1998.00228.x}, doi = {10.1046/j.1365-2109.1998.00228.x}, issn = {1355-557X, 1365-2109}, year = {1998}, date = {1998-06-01}, urldate = {2020-08-18}, journal = {Aquaculture Research}, volume = {29}, number = {6}, pages = {447--452}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Kristoffersen, Jon Bent; Salvanes, Anne Gro Vea Effects of formaldehyde and ethanol preservation on body and otoliths of Maurolicus muelleri and Benthosema glaciale Journal Article Sarsia, 83 (2), pp. 95–102, 1998, ISSN: 0036-4827. @article{kristoffersen_effects_1998, title = {Effects of formaldehyde and ethanol preservation on body and otoliths of Maurolicus muelleri and Benthosema glaciale}, author = {Jon Bent Kristoffersen and Anne Gro Vea Salvanes}, url = {http://www.tandfonline.com/doi/full/10.1080/00364827.1998.10413675}, doi = {10.1080/00364827.1998.10413675}, issn = {0036-4827}, year = {1998}, date = {1998-06-01}, urldate = {2020-08-18}, journal = {Sarsia}, volume = {83}, number = {2}, pages = {95--102}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Navajas, M; Lagnel, J; Gutierrez, J; Boursot, P Heredity, 80 (6), pp. 742–752, 1998, ISSN: 0018-067X, 1365-2540. @article{navajas_species-wide_1998, title = {Species-wide homogeneity of nuclear ribosomal ITS2 sequences in the spider mite Tetranychus urticae contrasts with extensive mitochondrial COI polymorphism}, author = {M Navajas and J Lagnel and J Gutierrez and P Boursot}, url = {http://www.nature.com/doifinder/10.1046/j.1365-2540.1998.00349.x}, doi = {10.1046/j.1365-2540.1998.00349.x}, issn = {0018-067X, 1365-2540}, year = {1998}, date = {1998-06-01}, urldate = {2020-08-18}, journal = {Heredity}, volume = {80}, number = {6}, pages = {742--752}, abstract = {We compared patterns of intraspecific polymorphism of two markers with contrasted modes of evolution, nuclear ribosomal DNA (rDNA) and mitochondrial DNA (mtDNA), in the phytophagous mite Tetranychus urticae Koch. The second internal transcribed spacer (ITS2) of rDNA and a fragment in the mtDNA gene coding for Cytochrome Oxidase I (COI), were PCR-amplified and sequenced in samples of various geographical origins distributed worldwide. The 15 COI haplotypes found fell into two major phylogenetic lineages differing by an average of 5% nucleotide divergence. Samples from the Mediterranean basin were represented in both lineages, and showed no phylogeographical structure. The other samples, from temperate regions of the northern hemisphere, were clustered in one of the lineages and displayed little variation, indicating a recent colonization of this region. In contrast, no variation at all was found at the ITS2 in this species. We sequenced both COI and ITS2 in four other species of the genus Tetranychus and found that, despite the absence of intraspecific polymorphism, ITS appears to evolve 2.5 times faster than COI. We argue that rDNA homogeneity over the species range of T. urticae results from the high colonization potential of this species, preventing long-term differentiation. Preliminary data on two other mite species (Amphitetranychus viennensis Zacher and Mononychellus progresivus Doreste) with stricter ecological requirements and more restricted colonization potential revealed substantial and concordant geographical differentiation for both ITS2 and COI.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We compared patterns of intraspecific polymorphism of two markers with contrasted modes of evolution, nuclear ribosomal DNA (rDNA) and mitochondrial DNA (mtDNA), in the phytophagous mite Tetranychus urticae Koch. The second internal transcribed spacer (ITS2) of rDNA and a fragment in the mtDNA gene coding for Cytochrome Oxidase I (COI), were PCR-amplified and sequenced in samples of various geographical origins distributed worldwide. The 15 COI haplotypes found fell into two major phylogenetic lineages differing by an average of 5% nucleotide divergence. Samples from the Mediterranean basin were represented in both lineages, and showed no phylogeographical structure. The other samples, from temperate regions of the northern hemisphere, were clustered in one of the lineages and displayed little variation, indicating a recent colonization of this region. In contrast, no variation at all was found at the ITS2 in this species. We sequenced both COI and ITS2 in four other species of the genus Tetranychus and found that, despite the absence of intraspecific polymorphism, ITS appears to evolve 2.5 times faster than COI. We argue that rDNA homogeneity over the species range of T. urticae results from the high colonization potential of this species, preventing long-term differentiation. Preliminary data on two other mite species (Amphitetranychus viennensis Zacher and Mononychellus progresivus Doreste) with stricter ecological requirements and more restricted colonization potential revealed substantial and concordant geographical differentiation for both ITS2 and COI. |
Desmarais, E; Lanneluc, I; Lagnel, J Direct amplification of length polymorphisms (DALP), or how to get and characterize new genetic markers in many species Journal Article Nucleic Acids Research, 26 (6), pp. 1458–1465, 1998, ISSN: 0305-1048, 1362-4962. @article{desmarais_direct_1998, title = {Direct amplification of length polymorphisms (DALP), or how to get and characterize new genetic markers in many species}, author = {E Desmarais and I Lanneluc and J Lagnel}, url = {https://academic.oup.com/nar/article-lookup/doi/10.1093/nar/26.6.1458}, doi = {10.1093/nar/26.6.1458}, issn = {0305-1048, 1362-4962}, year = {1998}, date = {1998-03-01}, urldate = {2020-08-17}, journal = {Nucleic Acids Research}, volume = {26}, number = {6}, pages = {1458--1465}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Rigos, G; Christophilogiannis, P; Giahnishi, M; Andriopoulou, A; Koutsodimoy, M; Nengas, I; Alexis, M Amyloodinium occelatum infestation on sharpsnout sea bream, Puntazzo puntazzo cetti Journal Article Bulletin of the European Association of Fish Pathologists, 18 , pp. 198 – 200, 1998. @article{rigos_amyloodinium_1998, title = {Amyloodinium occelatum infestation on sharpsnout sea bream, Puntazzo puntazzo cetti}, author = {G Rigos and P Christophilogiannis and M Giahnishi and A Andriopoulou and M Koutsodimoy and I Nengas and M Alexis}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-3042877967&partnerID=40&md5=e145ac3be1044818c798bd4a72383612}, year = {1998}, date = {1998-01-01}, journal = {Bulletin of the European Association of Fish Pathologists}, volume = {18}, pages = {198 -- 200}, abstract = {The devastating effect of Amyloodinium occelatum on sharpsnout sea bream, Puntazzo puntazzo Cetti is described in this note. Massive and rapid mortalities (100% in 48 h) of cultured juvenile (12 g) sharpsnout sea bream were attributed to an epizootic infection with the dinoflagellate A. occelatum parasitising the gills. A clinical infection was also apparent in gilthead sea bream, Sparus aurata L (10 g ) kept in adjacent cages but 25 % of the infected population survived the infection. On the contrary, sea bass, Dicentrarchus labrax L. (20gr) that were maintained near to the infected Sparids remained unaffected. This epizootic was attributed to the location of the cages site and the optimum for the parasite water temperature. The incidence confirms the lethal identity of the particular pathogen on cultured fish.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The devastating effect of Amyloodinium occelatum on sharpsnout sea bream, Puntazzo puntazzo Cetti is described in this note. Massive and rapid mortalities (100% in 48 h) of cultured juvenile (12 g) sharpsnout sea bream were attributed to an epizootic infection with the dinoflagellate A. occelatum parasitising the gills. A clinical infection was also apparent in gilthead sea bream, Sparus aurata L (10 g ) kept in adjacent cages but 25 % of the infected population survived the infection. On the contrary, sea bass, Dicentrarchus labrax L. (20gr) that were maintained near to the infected Sparids remained unaffected. This epizootic was attributed to the location of the cages site and the optimum for the parasite water temperature. The incidence confirms the lethal identity of the particular pathogen on cultured fish. |
Magoulas, A Application of molecular markers to aquaculture and broodstock management with special emphasis on microsatellite DNA Journal Article Cahiers Options Mediterrannes, 34 , pp. 153– 168, 1998. @article{magoulas_application_1998, title = {Application of molecular markers to aquaculture and broodstock management with special emphasis on microsatellite DNA}, author = {A Magoulas}, year = {1998}, date = {1998-01-01}, journal = {Cahiers Options Mediterrannes}, volume = {34}, pages = {153-- 168}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Dounas, C; Koutsoubas, D; Arvanitidis, C; Petihakis, G; Drummond, L; A, Eleftheriou Biodiversity and the impact of anthropogenic activities in Mediterranean lagoons: The case of Gialova lagoon, SW Greece Journal Article Oebalia, 24 , pp. 77–91, 1998. @article{dounas_biodiversity_1998, title = {Biodiversity and the impact of anthropogenic activities in Mediterranean lagoons: The case of Gialova lagoon, SW Greece}, author = {C Dounas and D Koutsoubas and C Arvanitidis and G Petihakis and L Drummond and Eleftheriou A}, year = {1998}, date = {1998-01-01}, journal = {Oebalia}, volume = {24}, pages = {77--91}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Drakopoulos, PG; Kornilios, S; Kristallas, A; Dounas, C Distribution of floating tar in the Cretan Sea, Eastern Mediterranean, and its relation to the surface circulation Inproceedings Technical University of Crete, Chania Greece, 1998, (Publication Title: 7th International Conference on Natural & Man - Made Hazards). @inproceedings{drakopoulos_distribution_1998, title = {Distribution of floating tar in the Cretan Sea, Eastern Mediterranean, and its relation to the surface circulation}, author = {PG Drakopoulos and S Kornilios and A Kristallas and C Dounas}, year = {1998}, date = {1998-01-01}, address = {Technical University of Crete, Chania Greece}, note = {Publication Title: 7th International Conference on Natural & Man - Made Hazards}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Mylonas, C C; III, Woods L C; Thomas, P; Zohar, Y General and Comparative Endocrinology, 110 (3), pp. 276–289, 1998, ISSN: 00166480, (Publisher: Academic Press Inc.). @article{mylonas_endocrine_1998, title = {Endocrine profiles of female-striped bass (Morone saxatilis) in captivity, during postvitellogenesis and induction of final oocyte maturation via controlled-release GnRHa-delivery systems}, author = {C C Mylonas and L C Woods III and P Thomas and Y Zohar}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031840295&doi=10.1006%2fgcen.1998.7073&partnerID=40&md5=c7317f6fe3df89e568e9b512562853c4}, doi = {10.1006/gcen.1998.7073}, issn = {00166480}, year = {1998}, date = {1998-01-01}, journal = {General and Comparative Endocrinology}, volume = {110}, number = {3}, pages = {276--289}, abstract = {Plasma levels of reproductive and thyroid hormones were measured in captive striped bass females during postvitellogenesis and the spawning period (March-June). Circulating gonadotropin II (GtH II), 17,20β-dihydroxy- 4-pregnen-3-one (17,20β-P), and 17,20β,21-trihydroxy-4-pregnen-3-one (17,20β,21-P) remained low and unchanged in nonmaturing females, while 17β- estradiol (E2) and testosterone (T) declined throughout postvitellogenesis. Plasma thyroxine (T4) declined significantly in mid-April, while triiodothyronine (T3) increased in mid-May. The only female that ovulated spontaneously had markedly different E2, T, and T3 profiles during postvitellogenesis, and had a surge in plasma GtH II during final oocyte maturation (FOM). The lack of a GtH II surge is presumably responsible for the absence of FOM, but earlier, and as of yet unknown, endocrine disruptions during postvitellogenesis may determine the female's ability to undergo FOM. Treatment of females with a gonadotropin-releasing hormone agonist (GnRHa)- delivery system induced FOM and ovulation within 3 and 10 days, respectively, and resulted in the production of fertile eggs. Plasma GtH II increased continually after GnRHa implantation, even in the presence of declining GnRHa plasma levels. Plasma E2 increased first and peaked prior to FOM, whereas T peaked at the peripheral germinal vesicle (GV) stage. Plasma 17,20β-P and 17,20β,21-P increased dramatically at the GV breakdown (GVBD) stage. Plasma T4 was unaffected by the GnRHa treatment, whereas T3 decreased after GnRHa implantation and remained low throughout FOM. Based on the observed hormonal profiles, FOM can be separated into an early phase (lipid-droplet coalescence, GV migration) associated with E2 and T elevations, and a late phase (yolk-globule coalescence, GVBD) associated with 17,20β-P and 17,20β,21-P elevation.}, note = {Publisher: Academic Press Inc.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Plasma levels of reproductive and thyroid hormones were measured in captive striped bass females during postvitellogenesis and the spawning period (March-June). Circulating gonadotropin II (GtH II), 17,20β-dihydroxy- 4-pregnen-3-one (17,20β-P), and 17,20β,21-trihydroxy-4-pregnen-3-one (17,20β,21-P) remained low and unchanged in nonmaturing females, while 17β- estradiol (E2) and testosterone (T) declined throughout postvitellogenesis. Plasma thyroxine (T4) declined significantly in mid-April, while triiodothyronine (T3) increased in mid-May. The only female that ovulated spontaneously had markedly different E2, T, and T3 profiles during postvitellogenesis, and had a surge in plasma GtH II during final oocyte maturation (FOM). The lack of a GtH II surge is presumably responsible for the absence of FOM, but earlier, and as of yet unknown, endocrine disruptions during postvitellogenesis may determine the female's ability to undergo FOM. Treatment of females with a gonadotropin-releasing hormone agonist (GnRHa)- delivery system induced FOM and ovulation within 3 and 10 days, respectively, and resulted in the production of fertile eggs. Plasma GtH II increased continually after GnRHa implantation, even in the presence of declining GnRHa plasma levels. Plasma E2 increased first and peaked prior to FOM, whereas T peaked at the peripheral germinal vesicle (GV) stage. Plasma 17,20β-P and 17,20β,21-P increased dramatically at the GV breakdown (GVBD) stage. Plasma T4 was unaffected by the GnRHa treatment, whereas T3 decreased after GnRHa implantation and remained low throughout FOM. Based on the observed hormonal profiles, FOM can be separated into an early phase (lipid-droplet coalescence, GV migration) associated with E2 and T elevations, and a late phase (yolk-globule coalescence, GVBD) associated with 17,20β-P and 17,20β,21-P elevation. |
Magoulas, A; Kotoulas, G; Batargias, C; Zouros, E Genetic markers in marine biology and aquaculture research: when to use what Incollection Agnese, J F (Ed.): Genetics and Aquaculture in Africa, pp. 67–78, ORSTOM, Paris, 1998, (Backup Publisher: ORSTOM). @incollection{magoulas_genetic_1998, title = {Genetic markers in marine biology and aquaculture research: when to use what}, author = {A Magoulas and G Kotoulas and C Batargias and E Zouros}, editor = {J F Agnese}, year = {1998}, date = {1998-01-01}, booktitle = {Genetics and Aquaculture in Africa}, pages = {67--78}, publisher = {ORSTOM}, address = {Paris}, note = {Backup Publisher: ORSTOM}, keywords = {}, pubstate = {published}, tppubtype = {incollection} } |
Vermeirssen, E L M; Scott, A P; Mylonas, C C; Zohar, Y General and Comparative Endocrinology, 112 (2), pp. 163–177, 1998, ISSN: 00166480, (Publisher: Academic Press Inc.). @article{vermeirssen_gonadotrophin-releasing_1998, title = {Gonadotrophin-releasing hormone agonist stimulates milt fluidity and plasma concentrations of 17,20β-dihydroxylated and 5β-reduced, 3α- hydroxylated C21 steroids in male plaice (Pleuronectes platessa)}, author = {E L M Vermeirssen and A P Scott and C C Mylonas and Y Zohar}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031791147&doi=10.1006%2fgcen.1998.7132&partnerID=40&md5=084f5de31828689e1bc39bc6cff252d6}, doi = {10.1006/gcen.1998.7132}, issn = {00166480}, year = {1998}, date = {1998-01-01}, journal = {General and Comparative Endocrinology}, volume = {112}, number = {2}, pages = {163--177}, abstract = {Spermiating male plaice were caught in the North Sea and acclimatised to laboratory conditions. In two experiments, males were injected intramuscularly with either microspheres or pellets containing gonadotrophin- releasing hormone agonist (GnRHa). Blood was sampled at 2- to 5-day intervals. Individual blood plasma specimens were assayed for testosterone, 5β-reduced, 3α-hydroxy ('5β,3α') steroids and sulphated 17,20βdihydroxy ('17,20β') steroids. Pooled plasma samples were also assayed for free and sulphated 17,20β-dihydroxy-4-pregnen-3-one, free 11-ketotestosterone, and glucuronidated testosterone and 11-ketotestosterone. Plasma concentrations of all steroids were significantly elevated by GnRHa from 2 to 5 days onwards following treatment. The most marked changes occurred in the concentrations of the sulphated 17,20β steroids, which comprised approximately equal amounts of 5β-pregnane-3α, 17,20β-triol 20-sulphate (3α,17,20β-P-5β-S) and 5β-pregnane-3β,17,20β-triol 20-sulphate, rising from ca. 1 to 30-80 ng/ml in the first and from ca. 8 to 80 ng/ml in the second experiment. Concentrations of 511,3α steroids matched those of 17,20β steroids in one experiment. However, in the other experiment, the two RIAs yielded highly disparate results in about 50% of the fish (including males in the control group). The plasma of these fish contained excessive amounts of 5β,3α- immunoreactive material between 10 and 25 days. This material was identified as 3α,17,21-trihydroxy-5β-pregnan-20-one 21-sulphate (a metabolite of 11- deoxycortisol). All previous studies have indicated that when plasma concentrations of this steroid are high, so are those of 3α,17,20β-P-5β- S. This is the first indication that these steroids are regulated independently. In a third experiment, milt fluidity and production were assessed at 10, 15, and 25 days following GnRHa implantation. Milt volume and fluidity were significantly enhanced by the GnRHa treatment.}, note = {Publisher: Academic Press Inc.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Spermiating male plaice were caught in the North Sea and acclimatised to laboratory conditions. In two experiments, males were injected intramuscularly with either microspheres or pellets containing gonadotrophin- releasing hormone agonist (GnRHa). Blood was sampled at 2- to 5-day intervals. Individual blood plasma specimens were assayed for testosterone, 5β-reduced, 3α-hydroxy ('5β,3α') steroids and sulphated 17,20βdihydroxy ('17,20β') steroids. Pooled plasma samples were also assayed for free and sulphated 17,20β-dihydroxy-4-pregnen-3-one, free 11-ketotestosterone, and glucuronidated testosterone and 11-ketotestosterone. Plasma concentrations of all steroids were significantly elevated by GnRHa from 2 to 5 days onwards following treatment. The most marked changes occurred in the concentrations of the sulphated 17,20β steroids, which comprised approximately equal amounts of 5β-pregnane-3α, 17,20β-triol 20-sulphate (3α,17,20β-P-5β-S) and 5β-pregnane-3β,17,20β-triol 20-sulphate, rising from ca. 1 to 30-80 ng/ml in the first and from ca. 8 to 80 ng/ml in the second experiment. Concentrations of 511,3α steroids matched those of 17,20β steroids in one experiment. However, in the other experiment, the two RIAs yielded highly disparate results in about 50% of the fish (including males in the control group). The plasma of these fish contained excessive amounts of 5β,3α- immunoreactive material between 10 and 25 days. This material was identified as 3α,17,21-trihydroxy-5β-pregnan-20-one 21-sulphate (a metabolite of 11- deoxycortisol). All previous studies have indicated that when plasma concentrations of this steroid are high, so are those of 3α,17,20β-P-5β- S. This is the first indication that these steroids are regulated independently. In a third experiment, milt fluidity and production were assessed at 10, 15, and 25 days following GnRHa implantation. Milt volume and fluidity were significantly enhanced by the GnRHa treatment. |
Mylonas, C C; Zohar, Y; III, Woods L C; Thomas, P; Schulz, R W Hormone profiles of captive striped bass Morone saxatilis during spermiation, and long-term enhancement of milt production Journal Article Journal of the World Aquaculture Society, 29 (4), pp. 379–392, 1998, ISSN: 08938849, (Publisher: World Aquaculture Society). @article{mylonas_hormone_1998, title = {Hormone profiles of captive striped bass Morone saxatilis during spermiation, and long-term enhancement of milt production}, author = {C C Mylonas and Y Zohar and L C Woods III and P Thomas and R W Schulz}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032261401&doi=10.1111%2fj.1749-7345.1998.tb00662.x&partnerID=40&md5=d718fea93ab4b8da4e8fb81c44a88e58}, doi = {10.1111/j.1749-7345.1998.tb00662.x}, issn = {08938849}, year = {1998}, date = {1998-01-01}, journal = {Journal of the World Aquaculture Society}, volume = {29}, number = {4}, pages = {379--392}, abstract = {Plasma profiles of reproductive and thyroid hormones were studied in captive striped bass Morone saxatilis during an 11-wk period encompassing the spawning season, and the effect of a sustained-release gonadotropin-releasing hormone agonist (GnRHa)-delivery system (GnRHa-implant) on milt production was evaluated. The highest percentage of spermiating fish was observed between mid-April and mid-May, and mean total expressible milt ranged from 3.5 to 6.0 mL/kg. Plasma gonadotropin II (GtH II) increased significantly, though inconsistently, during the spermiation period, whereas testosterone and 11-ketotestosterone levels declined continually. Plasma 17,20β-dihydroxy-4-pregnen-3-one and 17,20β,21-dihydroxy-4-pregnen-3-one remained low and unchanged during the peak of the spermiation period, while thyroid hormones were high and fluctuated without exhibiting a trend consistent with spermiation. The observed endocrine profiles suggest that captivity can diminish plasma GtH II and triiodothyronine levels in striped bass. Transfer of spermiating males from large holding tanks to small spawning tanks reduced total expressible milt after 14 d, but treatment with a GnRHa-implant restored milt volume, presumably due to the prolonged elevation of plasma GnRHa and GtH II induced by the GnRHa-implant. Also, treatment with the GnRHa-implant induced a two-to four-fold elevation of expressible milt for at least 20 d compared to control fish, while resulting in only a 5 to 15% decrease in sperm density. It appears that captivity and hatchery operations can diminish milt production in striped bass, and that GnRHa-delivery systems, via sustained elevation of plasma GtH II, can induce long-term enhancement in milt volume without affecting sperm density greatly.}, note = {Publisher: World Aquaculture Society}, keywords = {}, pubstate = {published}, tppubtype = {article} } Plasma profiles of reproductive and thyroid hormones were studied in captive striped bass Morone saxatilis during an 11-wk period encompassing the spawning season, and the effect of a sustained-release gonadotropin-releasing hormone agonist (GnRHa)-delivery system (GnRHa-implant) on milt production was evaluated. The highest percentage of spermiating fish was observed between mid-April and mid-May, and mean total expressible milt ranged from 3.5 to 6.0 mL/kg. Plasma gonadotropin II (GtH II) increased significantly, though inconsistently, during the spermiation period, whereas testosterone and 11-ketotestosterone levels declined continually. Plasma 17,20β-dihydroxy-4-pregnen-3-one and 17,20β,21-dihydroxy-4-pregnen-3-one remained low and unchanged during the peak of the spermiation period, while thyroid hormones were high and fluctuated without exhibiting a trend consistent with spermiation. The observed endocrine profiles suggest that captivity can diminish plasma GtH II and triiodothyronine levels in striped bass. Transfer of spermiating males from large holding tanks to small spawning tanks reduced total expressible milt after 14 d, but treatment with a GnRHa-implant restored milt volume, presumably due to the prolonged elevation of plasma GnRHa and GtH II induced by the GnRHa-implant. Also, treatment with the GnRHa-implant induced a two-to four-fold elevation of expressible milt for at least 20 d compared to control fish, while resulting in only a 5 to 15% decrease in sperm density. It appears that captivity and hatchery operations can diminish milt production in striped bass, and that GnRHa-delivery systems, via sustained elevation of plasma GtH II, can induce long-term enhancement in milt volume without affecting sperm density greatly. |
Kristoffersen, J B; Salvanes, A G V Life history of Maurolicus muelleri in fjordic and oceanic environments Journal Article Journal of Fish Biology, 53 (6), pp. 1324–1341, 1998, ISSN: 00221112. @article{kristoffersen_life_1998, title = {Life history of Maurolicus muelleri in fjordic and oceanic environments}, author = {J B Kristoffersen and A G V Salvanes}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032432626&doi=10.1006%2Fjfbi.1998.0799&partnerID=40&md5=a54c3a94e98cf1400b83d5c425bf3141}, doi = {10.1006/jfbi.1998.0799}, issn = {00221112}, year = {1998}, date = {1998-01-01}, journal = {Journal of Fish Biology}, volume = {53}, number = {6}, pages = {1324--1341}, abstract = {Life history parameters are compared for populations of Maurolicus muelleri from Norwegian fjords and the Norwegian Sea in 1995 and 1996. The mortality rate was higher in the oceanic population (2.55 for males, 2.00 for females) than in the fjords (1.15 for males, 0.97 for females). Fish from the Norwegian Sea population occupied a depth with higher light levels, which may have contributed to the higher mortality through increased visibility to predators. Differences in growth, condition and gonad weight indicated different resource levels caused by different population densities. Recruitment was weak in many fjords in 1994, but not in the Norwegian Sea. It is suggested that wind-generated advection may affect recruitment in fjords on the western coast of Norway.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Life history parameters are compared for populations of Maurolicus muelleri from Norwegian fjords and the Norwegian Sea in 1995 and 1996. The mortality rate was higher in the oceanic population (2.55 for males, 2.00 for females) than in the fjords (1.15 for males, 0.97 for females). Fish from the Norwegian Sea population occupied a depth with higher light levels, which may have contributed to the higher mortality through increased visibility to predators. Differences in growth, condition and gonad weight indicated different resource levels caused by different population densities. Recruitment was weak in many fjords in 1994, but not in the Norwegian Sea. It is suggested that wind-generated advection may affect recruitment in fjords on the western coast of Norway. |
Navajas, M J; Thistlewood, H M A; Lagnel, J; Hughes, C Microsatellite sequences are under-represented in two mite genomes Journal Article Insect Molecular Biology, 7 , pp. 249 – 256, 1998. @article{navajas_microsatellite_1998, title = {Microsatellite sequences are under-represented in two mite genomes}, author = {M J Navajas and H M A Thistlewood and J Lagnel and C Hughes}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0032145763&partnerID=40&md5=0aa4254ea03fcdf7b80276196317feae}, year = {1998}, date = {1998-01-01}, journal = {Insect Molecular Biology}, volume = {7}, pages = {249 -- 256}, abstract = {Microsatellites are known to be a common feature of eukaryote genomes. Here we investigate the presence of microsatellite sequences in the genome of two mite species, Tetranychus urticae and Amblyseius fallacis, based on screening of both mite genomic libraries and Southern blots of these mites that we compare to two vertebrates. No signal with GT15 or a faint smear with CT10 were obtained in Southern analysis for the two mites, whereas both probes strongly bound with vertebrate DNA. Genomic libraries constructed in plasmid and lambda vectors were probed and only two CT microsatellites were isolated for T. urticae. Among eight trinucleotides probes tested, the strongest hybridization signal was detected for T. urticae with CAT and TGA probes. These two classes of repeats were also the most represented in genomic library screenings. However, only sequences with short numbers of units could be detected (< CAT4 or TGA9). Congruency of Southern analysis and screening of partial genomic libraries indicates an under-representation of microsatellite sequences in the two mite genomes. The potential of the scarce repetitive DNA isolated from mites to serve as population genetics markers is discussed on the basis of preliminary assessment of their polymorphism.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Microsatellites are known to be a common feature of eukaryote genomes. Here we investigate the presence of microsatellite sequences in the genome of two mite species, Tetranychus urticae and Amblyseius fallacis, based on screening of both mite genomic libraries and Southern blots of these mites that we compare to two vertebrates. No signal with GT15 or a faint smear with CT10 were obtained in Southern analysis for the two mites, whereas both probes strongly bound with vertebrate DNA. Genomic libraries constructed in plasmid and lambda vectors were probed and only two CT microsatellites were isolated for T. urticae. Among eight trinucleotides probes tested, the strongest hybridization signal was detected for T. urticae with CAT and TGA probes. These two classes of repeats were also the most represented in genomic library screenings. However, only sequences with short numbers of units could be detected (< CAT4 or TGA9). Congruency of Southern analysis and screening of partial genomic libraries indicates an under-representation of microsatellite sequences in the two mite genomes. The potential of the scarce repetitive DNA isolated from mites to serve as population genetics markers is discussed on the basis of preliminary assessment of their polymorphism. |
Goulas, A; Polymenakou, P N; Diallinas, G Molecular determinants involved in function and specificity of nucleobase transporters are conserved in bacteria, fungi, plants and metazoa Inproceedings Proceedings of the 16th SMYTE, Costa-Papiernicka, Slovakia, 1998, (Publication Title: Proceedings of the 16th SMYTE, Small Meeting on Yeast Transport and Energetics Type: Conference Paper). @inproceedings{goulas_molecular_1998, title = {Molecular determinants involved in function and specificity of nucleobase transporters are conserved in bacteria, fungi, plants and metazoa}, author = {A Goulas and P N Polymenakou and G Diallinas}, year = {1998}, date = {1998-01-01}, booktitle = {Proceedings of the 16th SMYTE}, address = {Costa-Papiernicka, Slovakia}, note = {Publication Title: Proceedings of the 16th SMYTE, Small Meeting on Yeast Transport and Energetics Type: Conference Paper}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Hill, J; Hostert, P; Tsiourlis, G; Kasapidis, P; Udelhoven, T; Diemer, C Monitoring 20 years of increased grazing impact on the Greek island of Crete with earth observation satellites Journal Article Journal of Arid Environments, 39 (2), pp. 165–178, 1998, ISSN: 01401963, (Publisher: Academic Press). @article{hill_monitoring_1998, title = {Monitoring 20 years of increased grazing impact on the Greek island of Crete with earth observation satellites}, author = {J Hill and P Hostert and G Tsiourlis and P Kasapidis and T Udelhoven and C Diemer}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032103622&doi=10.1006%2fjare.1998.0392&partnerID=40&md5=5948f809f102880deb29992fcbf6ba03}, doi = {10.1006/jare.1998.0392}, issn = {01401963}, year = {1998}, date = {1998-01-01}, journal = {Journal of Arid Environments}, volume = {39}, number = {2}, pages = {165--178}, abstract = {The degradation of permanent semi-natural vegetation and the resulting acceleration of soil degradation and erosion processes constitute major elements of land degradation in the Mediterranean basin. These elements are triggered by human activities rather than climatic conditions. The Greek island of Crete represents a characteristic case of land degradation resulting from hundreds of years of intensive grazing and fires. Since Greece joined the European Communities in 1981, grazing in mountainous regions has greatly increased due to subsidies that became available through the Common Agricultural Policy. Within a European Research Project on the use of satellite remote sensing for monitoring environmental change in Mediterranean ecosystems (DeMon-2: An Integrated Approach to Assess and Monitor Desertification Processes in the Mediterranean Basin), we have initiated a study to monitor the impact of increased grazing pressure on two mountainous ecosystems in Crete. The approach is based on describing surface conditions and vegetation cover over time with a long-term series of earth observation satellites.}, note = {Publisher: Academic Press}, keywords = {}, pubstate = {published}, tppubtype = {article} } The degradation of permanent semi-natural vegetation and the resulting acceleration of soil degradation and erosion processes constitute major elements of land degradation in the Mediterranean basin. These elements are triggered by human activities rather than climatic conditions. The Greek island of Crete represents a characteristic case of land degradation resulting from hundreds of years of intensive grazing and fires. Since Greece joined the European Communities in 1981, grazing in mountainous regions has greatly increased due to subsidies that became available through the Common Agricultural Policy. Within a European Research Project on the use of satellite remote sensing for monitoring environmental change in Mediterranean ecosystems (DeMon-2: An Integrated Approach to Assess and Monitor Desertification Processes in the Mediterranean Basin), we have initiated a study to monitor the impact of increased grazing pressure on two mountainous ecosystems in Crete. The approach is based on describing surface conditions and vegetation cover over time with a long-term series of earth observation satellites. |
Palma, J; Andrade, J P; Paspatis, M; Divanach, P; Kentouri, M Morphometric characters in gilthead sea bream, Sparus aurata, red porgy, Pagrus pagrus and their hybrids (Sparidae) Journal Article Italian Journal of Zoology, 65 (sup1), pp. 435 – 439, 1998, ISSN: 1125-0003, 1748-5851. @article{palma_morphometric_1998, title = {Morphometric characters in gilthead sea bream, Sparus aurata, red porgy, Pagrus pagrus and their hybrids (Sparidae)}, author = {J Palma and J P Andrade and M Paspatis and P Divanach and M Kentouri}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0039702587&partnerID=40&md5=5ee992d3199c1a20e1e909920d20f6d8}, doi = {10.1080/11250009809386861}, issn = {1125-0003, 1748-5851}, year = {1998}, date = {1998-01-01}, journal = {Italian Journal of Zoology}, volume = {65}, number = {sup1}, pages = {435 -- 439}, abstract = {A morphometric comparison was made between Sparus aurata (n = 88), Pagrus pagrus (n = 38) and their hybrid 5. aurata (female) x P. pagrus (male) (n = 81) using 15 morphometric characteristics. The morphometric characteristics of the hybrids were generally intermediate to those of the parental species. However, characteristics related to the body shape (6) were more similar to S. aurata and those characters related to the head shape (9) were more similar to P. pagrus.}, keywords = {}, pubstate = {published}, tppubtype = {article} } A morphometric comparison was made between Sparus aurata (n = 88), Pagrus pagrus (n = 38) and their hybrid 5. aurata (female) x P. pagrus (male) (n = 81) using 15 morphometric characteristics. The morphometric characteristics of the hybrids were generally intermediate to those of the parental species. However, characteristics related to the body shape (6) were more similar to S. aurata and those characters related to the head shape (9) were more similar to P. pagrus. |
Pitta, Paraskevi; Karakassis, Ioannis; Tsapakis, Manolis; Zivanovic, Snezana Natural vs. mariculture induced variability in nutrients and plankton in the eastern Mediterranean Journal Article Hydrobiologia, 391 (1/3), pp. 179–192, 1998, ISSN: 00188158. @article{pitta_natural_1998, title = {Natural vs. mariculture induced variability in nutrients and plankton in the eastern Mediterranean}, author = {Paraskevi Pitta and Ioannis Karakassis and Manolis Tsapakis and Snezana Zivanovic}, url = {http://link.springer.com/10.1023/A:1003501832069}, doi = {10.1023/A:1003501832069}, issn = {00188158}, year = {1998}, date = {1998-01-01}, urldate = {2020-08-18}, journal = {Hydrobiologia}, volume = {391}, number = {1/3}, pages = {179--192}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Dermitzakis, E; Clark, A; Batargias, C; Magoulas, A; Zouros, E Negative covariance indicates mutation bias in a two-locus microsatellite system in the fish Sparus aurata Journal Article Genetics, 150 , pp. 1567–1575, 1998. @article{dermitzakis_negative_1998, title = {Negative covariance indicates mutation bias in a two-locus microsatellite system in the fish Sparus aurata}, author = {E Dermitzakis and A Clark and C Batargias and A Magoulas and E Zouros}, year = {1998}, date = {1998-01-01}, journal = {Genetics}, volume = {150}, pages = {1567--1575}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Kornilios, S; Drakopoulos, P G; Dounas, C Pelagic tar, dissolved/dispersed petroleum hydrocarbons and plastic distribution in the Cretan Sea, Greece Journal Article Marine Pollution Bulletin, 36 (12), pp. 989–993, 1998, ISSN: 0025326X. @article{kornilios_pelagic_1998, title = {Pelagic tar, dissolved/dispersed petroleum hydrocarbons and plastic distribution in the Cretan Sea, Greece}, author = {S Kornilios and P G Drakopoulos and C Dounas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032425472&doi=10.1016%2fS0025-326X%2898%2900102-7&partnerID=40&md5=5c9338c5690910be6dbc8ceebf588557}, doi = {10.1016/S0025-326X(98)00102-7}, issn = {0025326X}, year = {1998}, date = {1998-01-01}, journal = {Marine Pollution Bulletin}, volume = {36}, number = {12}, pages = {989--993}, abstract = {During the first cruise of R/V 'Philia' in July 1997 within the framework of the TALOS programme supported by the creek Ministry of Physical Planning and Public Works, the sampling of floating tar, litter and sea water for dissolved/dispersed petroleum hydrocarbons (DDPH) was carried out in the Cretan Sea. Analysis of these data has allowed a first assessment of the status of floating marine pollution in the region. DDPH measurements showed a mean concentration of 0.145 μg/l of chrysene equivalents (n = 24). Tar and plastics concentrations were in the range of 1 - 4280 and 0 - 1160 μg/m2, respectively. Mean pelagic tar concentration was 318 μg/m2, more than two times higher than what was reported for the area in previous studies. Based on in situ hydrographic observations there is strong evidence that most of the floating tar enters the Cretan Sea through the Ionian Sea.}, keywords = {}, pubstate = {published}, tppubtype = {article} } During the first cruise of R/V 'Philia' in July 1997 within the framework of the TALOS programme supported by the creek Ministry of Physical Planning and Public Works, the sampling of floating tar, litter and sea water for dissolved/dispersed petroleum hydrocarbons (DDPH) was carried out in the Cretan Sea. Analysis of these data has allowed a first assessment of the status of floating marine pollution in the region. DDPH measurements showed a mean concentration of 0.145 μg/l of chrysene equivalents (n = 24). Tar and plastics concentrations were in the range of 1 - 4280 and 0 - 1160 μg/m2, respectively. Mean pelagic tar concentration was 318 μg/m2, more than two times higher than what was reported for the area in previous studies. Based on in situ hydrographic observations there is strong evidence that most of the floating tar enters the Cretan Sea through the Ionian Sea. |
Machias, A; Tsimenides, N; Kokokiris, L; Divanach, P Ring formation on otoliths and scales of Pagrus pagrus: A comparative study Journal Article Journal of Fish Biology, 52 , pp. 350 – 361, 1998. @article{machias_ring_1998, title = {Ring formation on otoliths and scales of Pagrus pagrus: A comparative study}, author = {A Machias and N Tsimenides and L Kokokiris and P Divanach}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0031891494&partnerID=40&md5=87566c6d1571076dbe0eb747e98a83cd}, year = {1998}, date = {1998-01-01}, journal = {Journal of Fish Biology}, volume = {52}, pages = {350 -- 361}, abstract = {One annulus formed on the scales of farmed red porgy Pagrus pagrus each year during March and one opaque zone on the otoliths during June. Scales proved to be more sensitive than otoliths in recording the life history of the red porgy. A false annulus (ring of capture) was observed on the scales of the 0+ age group, but not on the otoliths. A gradual lengthening of the period of annulus formation was observed, from the younger to the older fish. The annulus formation in fish older than 2+ was less synchronized, due to the aquaculture conditions. Scales were more accurate than otoliths in annuli formation. A high percentage of missing or additional opaque zones were observed on otoliths of older fish. These irregularities were related to fish maturation and/or farming conditions. Farmed fish grew three times as fast as the wild fish.}, keywords = {}, pubstate = {published}, tppubtype = {article} } One annulus formed on the scales of farmed red porgy Pagrus pagrus each year during March and one opaque zone on the otoliths during June. Scales proved to be more sensitive than otoliths in recording the life history of the red porgy. A false annulus (ring of capture) was observed on the scales of the 0+ age group, but not on the otoliths. A gradual lengthening of the period of annulus formation was observed, from the younger to the older fish. The annulus formation in fish older than 2+ was less synchronized, due to the aquaculture conditions. Scales were more accurate than otoliths in annuli formation. A high percentage of missing or additional opaque zones were observed on otoliths of older fish. These irregularities were related to fish maturation and/or farming conditions. Farmed fish grew three times as fast as the wild fish. |
Rigos, G; Grigorakis, K; Nengas, I; Christophilogiannis, P; Yiagnisi, M; Koutsodimou, M; Andriopoulou, A; Alexis, M Stress-related pathology seems a significant obstacle for the intensive farming of common dentex, Dentex dentex (linnaeus 1758) Journal Article Bulletin of the European Association of Fish Pathologists, 18 , pp. 15 – 18, 1998. @article{rigos_stress-related_1998, title = {Stress-related pathology seems a significant obstacle for the intensive farming of common dentex, Dentex dentex (linnaeus 1758)}, author = {G Rigos and K Grigorakis and I Nengas and P Christophilogiannis and M Yiagnisi and M Koutsodimou and A Andriopoulou and M Alexis}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0003198749&partnerID=40&md5=304dccbac8bdb17b0c47eb5a179a0be7}, year = {1998}, date = {1998-01-01}, journal = {Bulletin of the European Association of Fish Pathologists}, volume = {18}, pages = {15 -- 18}, abstract = {High mortalities of pathological origin were evident when juvenile common dentex (Dentex dentex) L. were exposed to stress situations and increased handling. The pathological examination of an outbreak revealed the presence of two parasites, two bacterial pathogens and a chlamydia-like organism. These pathological findings that were accompanied with a moderate agonistic behaviour of the fish and cannibalism signs seem to be associated with the relatively high susceptibility of common dentex to stress conditions. The stressed individuals found to succumb easily to disease problems leading to progressive mortalities. Similar findings were appeared in the investigation of a new disease incidence due to bacterial infections. Neither pathological signs nor agonistic behaviour or cannibalism bites were evident when the fish were exposed to minimum stress situations and not extensively handled.}, keywords = {}, pubstate = {published}, tppubtype = {article} } High mortalities of pathological origin were evident when juvenile common dentex (Dentex dentex) L. were exposed to stress situations and increased handling. The pathological examination of an outbreak revealed the presence of two parasites, two bacterial pathogens and a chlamydia-like organism. These pathological findings that were accompanied with a moderate agonistic behaviour of the fish and cannibalism signs seem to be associated with the relatively high susceptibility of common dentex to stress conditions. The stressed individuals found to succumb easily to disease problems leading to progressive mortalities. Similar findings were appeared in the investigation of a new disease incidence due to bacterial infections. Neither pathological signs nor agonistic behaviour or cannibalism bites were evident when the fish were exposed to minimum stress situations and not extensively handled. |
Koukouras, A; Kühlmann, D; Voultsiadou, E; Vafidis, D; Dounas, C; Chintiroglou, C; Koutsoubas, D The macrofaunal assemblage associated with the scleractinian coral Cladocora caespitosa (L.) in the Aegean Sea Journal Article Annales de l'Institute Oceanographique, 74 (2), pp. 97–114, 1998, ISSN: 00789682. @article{koukouras_macrofaunal_1998, title = {The macrofaunal assemblage associated with the scleractinian coral Cladocora caespitosa (L.) in the Aegean Sea}, author = {A Koukouras and D Kühlmann and E Voultsiadou and D Vafidis and C Dounas and C Chintiroglou and D Koutsoubas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032226464&partnerID=40&md5=a085efb4c6388beeabc74c3201106b21}, issn = {00789682}, year = {1998}, date = {1998-01-01}, journal = {Annales de l'Institute Oceanographique}, volume = {74}, number = {2}, pages = {97--114}, abstract = {Colonies of the Scleractinian C. caespitosa were collected from two different sites in the Chalkidiki Peninsula (North Aegean Sea. Greece) in September 1987. The information obtained from multidimensional scaling and analysis of the data revealed a difference in the qualitative and quantitative composition of the associated assemblage between the two sites. Two distinguishable benthic communities exist, due to the different prevailing physicochemical parameters. At the shallow site, crustaceans and molluscs are the dominant taxa, in contrast to polychaetes at the deepest site. At both sites, deposit feeders dominate, with their numbers increasing with depth. In contrast, numbers of suspension feeders decrease with depth.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Colonies of the Scleractinian C. caespitosa were collected from two different sites in the Chalkidiki Peninsula (North Aegean Sea. Greece) in September 1987. The information obtained from multidimensional scaling and analysis of the data revealed a difference in the qualitative and quantitative composition of the associated assemblage between the two sites. Two distinguishable benthic communities exist, due to the different prevailing physicochemical parameters. At the shallow site, crustaceans and molluscs are the dominant taxa, in contrast to polychaetes at the deepest site. At both sites, deposit feeders dominate, with their numbers increasing with depth. In contrast, numbers of suspension feeders decrease with depth. |
Magoulas, A; Gjetvaj, B; Terzoglou, V; Zouros, E Three polymorphic microsatellites in the Japanese oyster, Crassostrea gigas (Thunberg) Journal Article Animal Genetics, 29 , pp. 69 – 70, 1998. @article{magoulas_three_1998, title = {Three polymorphic microsatellites in the Japanese oyster, Crassostrea gigas (Thunberg)}, author = {A Magoulas and B Gjetvaj and V Terzoglou and E Zouros}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0031869608&partnerID=40&md5=d61c90542e845be7feace22b67b93902}, year = {1998}, date = {1998-01-01}, journal = {Animal Genetics}, volume = {29}, pages = {69 -- 70}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
1997 |
Koumoundouros, G; Oran, G; Divanach, P; Stefanakis, S; Kentouri, M The opercular complex deformity in intensive gilthead sea bream (Sparus aurata L.) larviculture. Moment of apparition and description Journal Article Aquaculture, 156 (1-2), pp. 165–177, 1997, ISSN: 00448486. @article{koumoundouros_opercular_1997, title = {The opercular complex deformity in intensive gilthead sea bream (Sparus aurata L.) larviculture. Moment of apparition and description}, author = {G Koumoundouros and G Oran and P Divanach and S Stefanakis and M Kentouri}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0044848697892940}, doi = {10.1016/S0044-8486(97)89294-0}, issn = {00448486}, year = {1997}, date = {1997-10-01}, urldate = {2020-08-18}, journal = {Aquaculture}, volume = {156}, number = {1-2}, pages = {165--177}, abstract = {External morphology, head morphometry and osteology were used for early detection, description and heuristic study of the opercular complex abnormalities of intensively reared gilthead sea bream larvae (Sparus aurata). The first evidence of malformations were observed in larvae of 6.1 mm total length (TL). The abnormalities were fully developed during metamorphosis (11.0-22.0 mm TL). i.e., before the end of the hatchery phase. In 81.4% of the abnormal fish, the problem was unilateral with similar right/left frequency. In 85.5% of the cases, it was associated with severe foldings and twists of the operculum and/or suboperculum and rarely with an atrophy of these bones. The etiology, aquaculture applications and research targets for the erasure of skeletal malformations are discussed.}, keywords = {}, pubstate = {published}, tppubtype = {article} } External morphology, head morphometry and osteology were used for early detection, description and heuristic study of the opercular complex abnormalities of intensively reared gilthead sea bream larvae (Sparus aurata). The first evidence of malformations were observed in larvae of 6.1 mm total length (TL). The abnormalities were fully developed during metamorphosis (11.0-22.0 mm TL). i.e., before the end of the hatchery phase. In 81.4% of the abnormal fish, the problem was unilateral with similar right/left frequency. In 85.5% of the cases, it was associated with severe foldings and twists of the operculum and/or suboperculum and rarely with an atrophy of these bones. The etiology, aquaculture applications and research targets for the erasure of skeletal malformations are discussed. |
Rueda, F M; Lopez, J A; Martinez, F J; Zamora, S; Divanach, P; Kentouri, M Fatty acids in muscle of wild and farmed red porgy, Pagrus pagrus Journal Article Aquaculture Nutrition, 3 (3), pp. 161–165, 1997, ISSN: 1353-5773, 1365-2095. @article{rueda_fatty_1997, title = {Fatty acids in muscle of wild and farmed red porgy, Pagrus pagrus}, author = {F M Rueda and J A Lopez and F J Martinez and S Zamora and P Divanach and M Kentouri}, url = {http://doi.wiley.com/10.1046/j.1365-2095.1997.00088.x}, doi = {10.1046/j.1365-2095.1997.00088.x}, issn = {1353-5773, 1365-2095}, year = {1997}, date = {1997-09-01}, urldate = {2020-08-18}, journal = {Aquaculture Nutrition}, volume = {3}, number = {3}, pages = {161--165}, abstract = {The total fat content and the fatty acids of total lipids (TL), phospholipids (PL) and triacylglycerols (TAG) were analysed in white muscle from wild and reared red porgy, Pagrus pagrus (L.). The fat percentage was higher in reared (3.03 ± 0.57%) (mean ± SE) than wild (0.65 ± 0.03%) fish. The fatty acid pattern of reared porgy TL reflected the diet’s lipid. Wild red porgy showed higher levels of ω3 and ω6 polyunsaturated fatty acids (PUFA) than reared, but both the atherogenic index and the index of thrombogenicity were very low for both wild and reared red porgy. The lipid fractions showed that the PL were composed of very high levels of PUFA, especially 22:6ω3, and their composition seemed to be better regulated than the composition of TAG. TAG showed greater differences between wild and reared fish, presumably because they reflected the dietary content of lipids. PUFA were the principal component of wild red porgy TAG.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The total fat content and the fatty acids of total lipids (TL), phospholipids (PL) and triacylglycerols (TAG) were analysed in white muscle from wild and reared red porgy, Pagrus pagrus (L.). The fat percentage was higher in reared (3.03 ± 0.57%) (mean ± SE) than wild (0.65 ± 0.03%) fish. The fatty acid pattern of reared porgy TL reflected the diet’s lipid. Wild red porgy showed higher levels of ω3 and ω6 polyunsaturated fatty acids (PUFA) than reared, but both the atherogenic index and the index of thrombogenicity were very low for both wild and reared red porgy. The lipid fractions showed that the PL were composed of very high levels of PUFA, especially 22:6ω3, and their composition seemed to be better regulated than the composition of TAG. TAG showed greater differences between wild and reared fish, presumably because they reflected the dietary content of lipids. PUFA were the principal component of wild red porgy TAG. |
Øie, Gunvor; Makridis, Pavlos; Reitan, Kjell Inge; Olsen, Yngvar Protein and carbon utilization of rotifers (Brachionus plicatilis) in first feeding of turbot larvae (Scophthalmus maximus L.) Journal Article Aquaculture, 153 (1-2), pp. 103–122, 1997, ISSN: 00448486. @article{oie_protein_1997, title = {Protein and carbon utilization of rotifers (Brachionus plicatilis) in first feeding of turbot larvae (Scophthalmus maximus L.)}, author = {Gunvor Øie and Pavlos Makridis and Kjell Inge Reitan and Yngvar Olsen}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0044848696015141}, doi = {10.1016/S0044-8486(96)01514-1}, issn = {00448486}, year = {1997}, date = {1997-06-01}, urldate = {2020-08-18}, journal = {Aquaculture}, volume = {153}, number = {1-2}, pages = {103--122}, abstract = {The effect of three different rotifer enrichments was examined on growth, survival, pigmentation and viability of first feeding turbot larvae. The diets differed in rotifer content of protein, lipid and ratio of protein/lipid. The diets were fed to turbot with or without algae (Isochrysis galbana) added to the larval tanks. The turbot larvae were fed rotifers for 10 days and thereafter the same Artemia diet was fed to all treatments for the rest of the experimental period. Growth and survival of fish larvae were higher in tanks containing algae than in tanks where no algae were added. Independent of algal addition, the highest growth rate and survival was obtained by feeding rotifers containing the highest protein content. Larvae reared in greenwater consumed higher numbers of rotifers during the stagnant period than larvae kept in clearwater conditions, while analysis of the larval gut contents showed lower rotifer numbers in the gut of larvae reared in greenwater conditions. This must imply longer residence time of the food in the larval gut, and presumably also higher digestion and assimilation efficiencies of larvae maintained without algae than in larvae maintained with algae. Calculation of protein and carbon conversion efficiency showed higher utilization in larvae maintained without algae (18-28% for protein, 12-19% for carbon) than in larvae maintained with algae (6-9% for protein, 4-7% for carbon). No significant differences in pigmentation rata and stress sensitivity were observed among the larvae of the various treatments.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The effect of three different rotifer enrichments was examined on growth, survival, pigmentation and viability of first feeding turbot larvae. The diets differed in rotifer content of protein, lipid and ratio of protein/lipid. The diets were fed to turbot with or without algae (Isochrysis galbana) added to the larval tanks. The turbot larvae were fed rotifers for 10 days and thereafter the same Artemia diet was fed to all treatments for the rest of the experimental period. Growth and survival of fish larvae were higher in tanks containing algae than in tanks where no algae were added. Independent of algal addition, the highest growth rate and survival was obtained by feeding rotifers containing the highest protein content. Larvae reared in greenwater consumed higher numbers of rotifers during the stagnant period than larvae kept in clearwater conditions, while analysis of the larval gut contents showed lower rotifer numbers in the gut of larvae reared in greenwater conditions. This must imply longer residence time of the food in the larval gut, and presumably also higher digestion and assimilation efficiencies of larvae maintained without algae than in larvae maintained with algae. Calculation of protein and carbon conversion efficiency showed higher utilization in larvae maintained without algae (18-28% for protein, 12-19% for carbon) than in larvae maintained with algae (6-9% for protein, 4-7% for carbon). No significant differences in pigmentation rata and stress sensitivity were observed among the larvae of the various treatments. |
Koumoundouros, G; Gagliardi, F; Divanach, P; Boglione, C; Cataudella, S; Kentouri, M Normal and abnormal osteological development of caudal fin in Sparus aurata L. fry Journal Article Aquaculture, 149 (3-4), pp. 215–226, 1997, ISSN: 00448486. @article{koumoundouros_normal_1997, title = {Normal and abnormal osteological development of caudal fin in Sparus aurata L. fry}, author = {G Koumoundouros and F Gagliardi and P Divanach and C Boglione and S Cataudella and M Kentouri}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0044848696014433}, doi = {10.1016/S0044-8486(96)01443-3}, issn = {00448486}, year = {1997}, date = {1997-03-01}, urldate = {2020-08-18}, journal = {Aquaculture}, volume = {149}, number = {3-4}, pages = {215--226}, abstract = {Normal osteological development of the caudal fin in gilthead sea bream is described at the larval and juvenile stages. It was used as a standard for the study of a sea bream larval population with characteristic osteological deviations which give rise to abnormal juveniles. Normal specimens were reared under extensive rearing conditions, and abnormal specimens under intensive rearing conditions. The first hypural elements appearing in the abnormal preflexion larvae were deformed and displaced. With development, all elements related to the caudal region (parhypural, hypuralia, epuralia, vertebra centra, neural and haemal processes) formed abnormally. The abnormalities were extra-numerous elements, fusions, deformities and displacements of the elements.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Normal osteological development of the caudal fin in gilthead sea bream is described at the larval and juvenile stages. It was used as a standard for the study of a sea bream larval population with characteristic osteological deviations which give rise to abnormal juveniles. Normal specimens were reared under extensive rearing conditions, and abnormal specimens under intensive rearing conditions. The first hypural elements appearing in the abnormal preflexion larvae were deformed and displaced. With development, all elements related to the caudal region (parhypural, hypuralia, epuralia, vertebra centra, neural and haemal processes) formed abnormally. The abnormalities were extra-numerous elements, fusions, deformities and displacements of the elements. |
Pitta, P; Tsapakis, E; Dafnomili, E; Karakassis, Ioannis Aquaculture impact on the planktonic system in three fish farms Inproceedings pp. 219–222, 1997, (Publication Title: 5th Pan-Hellenic Symposium of Oceanography and Fisheries). @inproceedings{pitta_aquaculture_1997, title = {Aquaculture impact on the planktonic system in three fish farms}, author = {P Pitta and E Tsapakis and E Dafnomili and Ioannis Karakassis}, year = {1997}, date = {1997-01-01}, volume = {II}, pages = {219--222}, note = {Publication Title: 5th Pan-Hellenic Symposium of Oceanography and Fisheries}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Rigos, G; Grigorakis, K; Christophilogannis, P; Nengas, I; Alexis, M Ceratomyxa spp. (myxosporea) infection in cultured common dentex from Greece Journal Article Bulletin of the European Association of Fish Pathologists, 17 , pp. 174 – 176, 1997. @article{rigos_ceratomyxa_1997, title = {Ceratomyxa spp. (myxosporea) infection in cultured common dentex from Greece}, author = {G Rigos and K Grigorakis and P Christophilogannis and I Nengas and M Alexis}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0001359151&partnerID=40&md5=c9888b53eed53faf487895ab5061da21}, year = {1997}, date = {1997-01-01}, journal = {Bulletin of the European Association of Fish Pathologists}, volume = {17}, pages = {174 -- 176}, abstract = {Ceratomyxosis was found in common dentex (Dentex dentex L.), a new cultured Sparidae species in Mediterranean mariculture. The cause of the disease appeared to be the myxosporean Ceratomyxa diplodae and C. labrakis with the first being more prevalent. Both coelozoic species were recovered from the bile and the intestinal mucosa without affecting other tissues, however, a possible disorder of the digestive functions may be the cause of the moderate emaciation and mortality of the fish.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Ceratomyxosis was found in common dentex (Dentex dentex L.), a new cultured Sparidae species in Mediterranean mariculture. The cause of the disease appeared to be the myxosporean Ceratomyxa diplodae and C. labrakis with the first being more prevalent. Both coelozoic species were recovered from the bile and the intestinal mucosa without affecting other tissues, however, a possible disorder of the digestive functions may be the cause of the moderate emaciation and mortality of the fish. |
Mylonas, C C; Scott, A P; Vermeirssen, E L M; Zohar, Y Biology of Reproduction, 57 (3), pp. 669–675, 1997, ISSN: 00063363. @article{mylonas_changes_1997, title = {Changes in plasma gonadotropin II and sex steroid hormones, and sperm production of striped bass after treatment with controlled-release gonadotropin-releasing hormone agonist-delivery systems}, author = {C C Mylonas and A P Scott and E L M Vermeirssen and Y Zohar}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030838590&doi=10.1095%2fbiolreprod57.3.669&partnerID=40&md5=611a3480a18c07ff0a4dcaa0996716a2}, doi = {10.1095/biolreprod57.3.669}, issn = {00063363}, year = {1997}, date = {1997-01-01}, journal = {Biology of Reproduction}, volume = {57}, number = {3}, pages = {669--675}, abstract = {Spermiating striped bass, a perciform fish, were treated with two controlled-release gonadotropin-releasing hormone agonist (GnRHa)-delivery systems, and the resulting changes in plasma gonadotropin II (GTH II), testosterone (T), 11-ketotestosterone (11-KT), 17,20β-dihydroxy-4-pregnen- 3-one (17,20β-P), and 17,20β,21-trihydroxy-4-pregnen-3-one (17,20β,21-P) were correlated with changes in milt production and sperm density. GnRHa- delivery systems induced a sustained elevation of plasma GnRHa and GTH II for 14 days. Plasma T levels were unchanged after GnRHa treatment, while 11-KT levels increased significantly. Plasma 17,20β-P also increased after GnRHa treatment and remained elevated compared to levels in controls, while plasma 17,20β,21-P levels were unaffected. Both GnRHa-delivery systems induced many-fold increases in total expressible milt, lasting throughout the 14 days of the study. Sperm density decreased 2 days after GnRHa treatment, with a subsequent increase by Day 7. This study demonstrates that GnRHa-delivery systems induce a sustained elevation of plasma GTH II levels in striped bass, resulting in a long-term enhancement of milt production. The endocrine changes observed suggest that 11-KT and 17,20β-P, but not 17,20β,21-P, are mediating the effects of GTH II on spermiation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Spermiating striped bass, a perciform fish, were treated with two controlled-release gonadotropin-releasing hormone agonist (GnRHa)-delivery systems, and the resulting changes in plasma gonadotropin II (GTH II), testosterone (T), 11-ketotestosterone (11-KT), 17,20β-dihydroxy-4-pregnen- 3-one (17,20β-P), and 17,20β,21-trihydroxy-4-pregnen-3-one (17,20β,21-P) were correlated with changes in milt production and sperm density. GnRHa- delivery systems induced a sustained elevation of plasma GnRHa and GTH II for 14 days. Plasma T levels were unchanged after GnRHa treatment, while 11-KT levels increased significantly. Plasma 17,20β-P also increased after GnRHa treatment and remained elevated compared to levels in controls, while plasma 17,20β,21-P levels were unaffected. Both GnRHa-delivery systems induced many-fold increases in total expressible milt, lasting throughout the 14 days of the study. Sperm density decreased 2 days after GnRHa treatment, with a subsequent increase by Day 7. This study demonstrates that GnRHa-delivery systems induce a sustained elevation of plasma GTH II levels in striped bass, resulting in a long-term enhancement of milt production. The endocrine changes observed suggest that 11-KT and 17,20β-P, but not 17,20β,21-P, are mediating the effects of GTH II on spermiation. |
Dounas, C; Kallianiotis, Argyris Construction of an artificial reef park and creation of a marine protected zone in order to prevent fishing activities off the coasts of Thrace (N. Aegean Sea) Journal Article Fishing News, 197 , pp. 50–55, 1997, ((in Greek)). @article{dounas_construction_1997, title = {Construction of an artificial reef park and creation of a marine protected zone in order to prevent fishing activities off the coasts of Thrace (N. Aegean Sea)}, author = {C Dounas and Argyris Kallianiotis}, year = {1997}, date = {1997-01-01}, journal = {Fishing News}, volume = {197}, pages = {50--55}, note = {(in Greek)}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Mylonas, C C; III, Woods L C; Zohar, Y Cyto-histological examination of post-vitellogenesis and final oocyte maturation in captive-reared striped bass Journal Article Journal of Fish Biology, 50 (1), pp. 34–49, 1997, ISSN: 00221112. @article{mylonas_cyto-histological_1997, title = {Cyto-histological examination of post-vitellogenesis and final oocyte maturation in captive-reared striped bass}, author = {C C Mylonas and L C Woods III and Y Zohar}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030910478&doi=10.1006%2fjfbi.1996.0275&partnerID=40&md5=abcc991c7bc67da2d0568b13c38816b3}, doi = {10.1006/jfbi.1996.0275}, issn = {00221112}, year = {1997}, date = {1997-01-01}, journal = {Journal of Fish Biology}, volume = {50}, number = {1}, pages = {34--49}, abstract = {The ovarian development of captive-reared, striped bass Morone saxatilis was examined during a 10-week period encompassing the spawning season. Vitellogenic oocytes in March had a mean diameter of 838 ± 18 μm and did not grow significantly therafter. Except from one non-hormone-treated fish, all females failed to undergo final oocyte maturation (FOM) and their ovaries became atretic with the onset of high spring temperatures. A clearing fixative was found useful in identifying early of atresia, evident by the absence of the germinal vesicle (GV). Final oocyte maturation of fish maturation of fish treated with gonadotropin-releasing hormone agonist (GnRhA) consisted of two phases. Early FOM lasted from 1 to 3 weeks, and was associated with lipid-droplet coalescence, and displacement of the GV and yolk globules to the peripheral cytoplasm. Late FOM lasted textless24 h, and consisted of yolk-globule coalescence and GV breakdown (GVBD). Ovulated eggs had completely coalesced lipid and yolk masses, with cortical alveoli lined against the cell wall. Both phases of FOM were associated with significant increases in oocyte diameter. Striped boss oocytes showed important morphological differences compared to oocytes of other members of the Moronidae family, in terms of percentage lipid content, chorion thickness and degree of hydration after ovulation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The ovarian development of captive-reared, striped bass Morone saxatilis was examined during a 10-week period encompassing the spawning season. Vitellogenic oocytes in March had a mean diameter of 838 ± 18 μm and did not grow significantly therafter. Except from one non-hormone-treated fish, all females failed to undergo final oocyte maturation (FOM) and their ovaries became atretic with the onset of high spring temperatures. A clearing fixative was found useful in identifying early of atresia, evident by the absence of the germinal vesicle (GV). Final oocyte maturation of fish maturation of fish treated with gonadotropin-releasing hormone agonist (GnRhA) consisted of two phases. Early FOM lasted from 1 to 3 weeks, and was associated with lipid-droplet coalescence, and displacement of the GV and yolk globules to the peripheral cytoplasm. Late FOM lasted textless24 h, and consisted of yolk-globule coalescence and GV breakdown (GVBD). Ovulated eggs had completely coalesced lipid and yolk masses, with cortical alveoli lined against the cell wall. Both phases of FOM were associated with significant increases in oocyte diameter. Striped boss oocytes showed important morphological differences compared to oocytes of other members of the Moronidae family, in terms of percentage lipid content, chorion thickness and degree of hydration after ovulation. |
Pavlidis, M; Berry, M; Divanach, P; Kentouri, M Diel pattern of haematocrit, serum metabolites, osmotic pressure, electrolytes and thyroid hormones in sea bass and sea bream Journal Article Aquaculture International, 5 , pp. 237 – 247, 1997. @article{pavlidis_diel_1997, title = {Diel pattern of haematocrit, serum metabolites, osmotic pressure, electrolytes and thyroid hormones in sea bass and sea bream}, author = {M Pavlidis and M Berry and P Divanach and M Kentouri}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0000527603&partnerID=40&md5=43ffd0cedb64e4f7359a2e7f9a22c7ef}, year = {1997}, date = {1997-01-01}, journal = {Aquaculture International}, volume = {5}, pages = {237 -- 247}, abstract = {The diel pattern of haematocrit, serum metabolites, electrolytes and thyroid hormones are described in sea bass, Dicentrarchus labrax, and sea bream, Sparus auratus, held under 12L:12D light cycle (0600-1800 h light). No diel rhythmicity in haematocrit, total proteins, potassium and chloride was observed. Maximum values of glucose, osmotic pressure and sodium were recorded at dusk (1800 h) in both species, irrespective of differences in the size of fish and feeding regime used. Maximum and minimum triiodothyronine values were found during the scotophase in bass and during the photophase in bream. Maximum thyroxine levels occurred at 1400 h (bass) and 1800 h (bream) and minimum during the scotophase, in both species. The light/dark alternation seems to be an important synchronizer of the observed diel changes. Results are discussed in relation to the timing of feeding and the general activity of the fish.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The diel pattern of haematocrit, serum metabolites, electrolytes and thyroid hormones are described in sea bass, Dicentrarchus labrax, and sea bream, Sparus auratus, held under 12L:12D light cycle (0600-1800 h light). No diel rhythmicity in haematocrit, total proteins, potassium and chloride was observed. Maximum values of glucose, osmotic pressure and sodium were recorded at dusk (1800 h) in both species, irrespective of differences in the size of fish and feeding regime used. Maximum and minimum triiodothyronine values were found during the scotophase in bass and during the photophase in bream. Maximum thyroxine levels occurred at 1400 h (bass) and 1800 h (bream) and minimum during the scotophase, in both species. The light/dark alternation seems to be an important synchronizer of the observed diel changes. Results are discussed in relation to the timing of feeding and the general activity of the fish. |
Tselepides, A; Polychronaki, T; Dafnomili, E; Plaiti, W; Zivanovic, S Distribution of nutrients, chloroplastic pigments, POC, PON and ATP in the Cretan Sea (NE Mediterranean): Seasonal and interannual variability Inproceedings pp. 189–193, 1997, (Publication Title: The 5th Pan-Hellenic Symposium of Oceanography and Fisheries). @inproceedings{tselepides_distribution_1997, title = {Distribution of nutrients, chloroplastic pigments, POC, PON and ATP in the Cretan Sea (NE Mediterranean): Seasonal and interannual variability}, author = {A Tselepides and T Polychronaki and E Dafnomili and W Plaiti and S Zivanovic}, year = {1997}, date = {1997-01-01}, volume = {I}, pages = {189--193}, note = {Publication Title: The 5th Pan-Hellenic Symposium of Oceanography and Fisheries}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Koutsoubas, D; Dounas, C; Petihakis, G; Arvanitidis, C; Triantafyllou, G; Dafnomili, E; Zivanovic, S Dynamics of the physicochemical parameters in water column and in the sediments of the Gialova lagoon (NW Peloponnese, Ionian Sea) Inproceedings pp. 351–353, Kavala, Greece, 1997, (Publication Title: Seventh Symposium on Oceanography and Fisheries, Κavala). @inproceedings{koutsoubas_dynamics_1997, title = {Dynamics of the physicochemical parameters in water column and in the sediments of the Gialova lagoon (NW Peloponnese, Ionian Sea)}, author = {D Koutsoubas and C Dounas and G Petihakis and C Arvanitidis and G Triantafyllou and E Dafnomili and S Zivanovic}, year = {1997}, date = {1997-01-01}, volume = {II}, pages = {351--353}, address = {Kavala, Greece}, note = {Publication Title: Seventh Symposium on Oceanography and Fisheries, Κavala}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Chatzifotis, S; Takeuchi, T Aquaculture, 158 (1-2), pp. 129–140, 1997, ISSN: 00448486. @article{chatzifotis_effect_1997-1, title = {Effect of supplemental camitine on body weight loss, proximate and lipid compositions and carnitine content of red sea bream (Pagrus major) during starvation}, author = {S Chatzifotis and T Takeuchi}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031457222&doi=10.1016%2fS0044-8486%2897%2900175-0&partnerID=40&md5=2050750033b443a4d28cf92926fcb924}, doi = {10.1016/S0044-8486(97)00175-0}, issn = {00448486}, year = {1997}, date = {1997-01-01}, journal = {Aquaculture}, volume = {158}, number = {1-2}, pages = {129--140}, abstract = {The effect of supplemental dietary carnitine on the body weight loss, lipid composition and carnitine content of dorsal muscle of red sea bream during starvation was investigated. Two experimental groups of red sea bream fingerlings were used. One group was fed a control diet (Diet 1; textless 0.09 g carnitine/kg feed) for 30 days prior to starvation while the second group was fed a carnitine-supplemented diet (Diet 2; 4 g carnitine/kg feed). Then fish were deprived of feed for 30 days. During the feeding period, fish fed Diet 2 accumulated free-carnitine in their dorsal muscle. The acid-soluble acylcarnitine content remained constant, indicating a redistribution of free and esterified carnitine. Although the long-chain acylcarnitine in the dorsal muscle increased during starvagion, no difference was observed in the long-chain acylcarnitine content between the carnitine and the control group. The higher concentration of carnitine in the diet prior to starvation clearly did not show any effect on body weight loss or on the proximate and fatty acid compositions of dorsal muscle nor on the fatty acid composition of the liver. Carnitine supplementation prior to starvation did not show any clear effect on lipid classes in dorsal muscle and liver or on crude lipid and water concentration in liver during starvation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The effect of supplemental dietary carnitine on the body weight loss, lipid composition and carnitine content of dorsal muscle of red sea bream during starvation was investigated. Two experimental groups of red sea bream fingerlings were used. One group was fed a control diet (Diet 1; textless 0.09 g carnitine/kg feed) for 30 days prior to starvation while the second group was fed a carnitine-supplemented diet (Diet 2; 4 g carnitine/kg feed). Then fish were deprived of feed for 30 days. During the feeding period, fish fed Diet 2 accumulated free-carnitine in their dorsal muscle. The acid-soluble acylcarnitine content remained constant, indicating a redistribution of free and esterified carnitine. Although the long-chain acylcarnitine in the dorsal muscle increased during starvagion, no difference was observed in the long-chain acylcarnitine content between the carnitine and the control group. The higher concentration of carnitine in the diet prior to starvation clearly did not show any effect on body weight loss or on the proximate and fatty acid compositions of dorsal muscle nor on the fatty acid composition of the liver. Carnitine supplementation prior to starvation did not show any clear effect on lipid classes in dorsal muscle and liver or on crude lipid and water concentration in liver during starvation. |
Divanach, P; Papandroulakis, N; Anastasiadis, P; Koumoundouros, G; Kentouri, M Aquaculture, 156 , pp. 145 – 155, 1997. @article{divanach_effect_1997, title = {Effect of water currents on the development of skeletal deformities in sea bass (Dicentrarchus labtax L.) with functional swimbladder during postlarval and nursery phase}, author = {P Divanach and N Papandroulakis and P Anastasiadis and G Koumoundouros and M Kentouri}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0030678081&partnerID=40&md5=ff2eb4edf54484b5987625d1168e5cac}, year = {1997}, date = {1997-01-01}, journal = {Aquaculture}, volume = {156}, pages = {145 -- 155}, abstract = {Lordosis in reared sea bass was previously related either to the absence of swimbladder, or to bad or late inflation of this organ when damages were irreversible. Our results prove that these explanations are insufficient and that similar deformations may occur frequently in fry with functional swimbladder during the early weaning phase, if currents in tanks are higher than 10 cm s-1.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Lordosis in reared sea bass was previously related either to the absence of swimbladder, or to bad or late inflation of this organ when damages were irreversible. Our results prove that these explanations are insufficient and that similar deformations may occur frequently in fry with functional swimbladder during the early weaning phase, if currents in tanks are higher than 10 cm s-1. |
Tsapakis, E; Karakassis, Ioannis; Xatziyanni, E; Maidanou, M Effects of aquaculture in three coastal areas Journal Article Fisheries News, 199 , pp. 90–95, 1997. @article{tsapakis_effects_1997, title = {Effects of aquaculture in three coastal areas}, author = {E Tsapakis and Ioannis Karakassis and E Xatziyanni and M Maidanou}, year = {1997}, date = {1997-01-01}, journal = {Fisheries News}, volume = {199}, pages = {90--95}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Publications
1999 |
Food size selectivity of Artemia franciscana at three developmental stages Journal Article Journal of Plankton Research, 21 (11), pp. 2191–2201, 1999, ISSN: 14643774. |
Leaching, palatability and digestibility of oxytetracycline and oxolinic acid included in diets fed to seabass Dicentrarchus labrax L. Journal Article Aquaculture Research, 30 , pp. 841 – 847, 1999. |
Progress in Industrial Microbiology, 35 , pp. 357–362, Elsevier, 1999, ISBN: 978-0-444-50387-9. |
Modelling the annual cycles of nutrients and phytoplankton in a Mediterranean lagoon (Gialova, Greece) Journal Article Marine Environmental Research, 48 (1), pp. 37–58, 1999, ISSN: 01411136. |
Myxosporean infections in Greek mariculture Journal Article Aquaculture International, 7 , pp. 361 – 364, 1999. |
Prothrombin time, activated partial thromboplastin time and fibrinogen values in Mediterranean marine teleosts Journal Article Fish Physiology and Biochemistry, 21 (4), pp. 335–343, 1999, ISSN: 09201742. |
Seasonal variability and distribution of organic matter in surface and subsurface sediments of the Aegean Sea. Inproceedings Perpignan, France, 1999, (Publication Title: The 4th MTP workshop- MATER). |
Sequence variation of ribosomal Internal Transcribed Spacers (ITS) in commercially important Phytoseiidae mites Journal Article Experimental and Applied Acarology, 23 , pp. 851 – 859, 1999. |
Study of the seasonal fluctuation of the ecological quality of the Rivers: Kalamas, Acherontas, Alfios, Pinios with the use of benthic macro-invertebrates as bioindicators. Inproceedings of Sciences, Hellenic Society Biological (Ed.): 21st Conference of the Hellenic Society of Biological Sciences, pp. 91–92, Syros, Greece, 1999. |
The North Mediterranean Barbus lineage : phylogenetic hypotheses and taxonomic implications based on allozyme data Journal Article Journal of Fish Biology, 54 (2), pp. 267–286, 1999. |
Unilateral eye abnormalities in reared Mediterranean gilthead sea bream Journal Article Veterinary Record, 145 , pp. 494 – 497, 1999. |
1998 |
Effect of fasting and refeeding on growth and body composition of red porgy, Pagrus pagrus L.* Journal Article Aquaculture Research, 29 (6), pp. 447–452, 1998, ISSN: 1355-557X, 1365-2109. |
Effects of formaldehyde and ethanol preservation on body and otoliths of Maurolicus muelleri and Benthosema glaciale Journal Article Sarsia, 83 (2), pp. 95–102, 1998, ISSN: 0036-4827. |
Heredity, 80 (6), pp. 742–752, 1998, ISSN: 0018-067X, 1365-2540. |
Direct amplification of length polymorphisms (DALP), or how to get and characterize new genetic markers in many species Journal Article Nucleic Acids Research, 26 (6), pp. 1458–1465, 1998, ISSN: 0305-1048, 1362-4962. |
Amyloodinium occelatum infestation on sharpsnout sea bream, Puntazzo puntazzo cetti Journal Article Bulletin of the European Association of Fish Pathologists, 18 , pp. 198 – 200, 1998. |
Application of molecular markers to aquaculture and broodstock management with special emphasis on microsatellite DNA Journal Article Cahiers Options Mediterrannes, 34 , pp. 153– 168, 1998. |
Biodiversity and the impact of anthropogenic activities in Mediterranean lagoons: The case of Gialova lagoon, SW Greece Journal Article Oebalia, 24 , pp. 77–91, 1998. |
Distribution of floating tar in the Cretan Sea, Eastern Mediterranean, and its relation to the surface circulation Inproceedings Technical University of Crete, Chania Greece, 1998, (Publication Title: 7th International Conference on Natural & Man - Made Hazards). |
General and Comparative Endocrinology, 110 (3), pp. 276–289, 1998, ISSN: 00166480, (Publisher: Academic Press Inc.). |
Genetic markers in marine biology and aquaculture research: when to use what Incollection Agnese, J F (Ed.): Genetics and Aquaculture in Africa, pp. 67–78, ORSTOM, Paris, 1998, (Backup Publisher: ORSTOM). |
General and Comparative Endocrinology, 112 (2), pp. 163–177, 1998, ISSN: 00166480, (Publisher: Academic Press Inc.). |
Hormone profiles of captive striped bass Morone saxatilis during spermiation, and long-term enhancement of milt production Journal Article Journal of the World Aquaculture Society, 29 (4), pp. 379–392, 1998, ISSN: 08938849, (Publisher: World Aquaculture Society). |
Life history of Maurolicus muelleri in fjordic and oceanic environments Journal Article Journal of Fish Biology, 53 (6), pp. 1324–1341, 1998, ISSN: 00221112. |
Microsatellite sequences are under-represented in two mite genomes Journal Article Insect Molecular Biology, 7 , pp. 249 – 256, 1998. |
Molecular determinants involved in function and specificity of nucleobase transporters are conserved in bacteria, fungi, plants and metazoa Inproceedings Proceedings of the 16th SMYTE, Costa-Papiernicka, Slovakia, 1998, (Publication Title: Proceedings of the 16th SMYTE, Small Meeting on Yeast Transport and Energetics Type: Conference Paper). |
Monitoring 20 years of increased grazing impact on the Greek island of Crete with earth observation satellites Journal Article Journal of Arid Environments, 39 (2), pp. 165–178, 1998, ISSN: 01401963, (Publisher: Academic Press). |
Morphometric characters in gilthead sea bream, Sparus aurata, red porgy, Pagrus pagrus and their hybrids (Sparidae) Journal Article Italian Journal of Zoology, 65 (sup1), pp. 435 – 439, 1998, ISSN: 1125-0003, 1748-5851. |
Natural vs. mariculture induced variability in nutrients and plankton in the eastern Mediterranean Journal Article Hydrobiologia, 391 (1/3), pp. 179–192, 1998, ISSN: 00188158. |
Negative covariance indicates mutation bias in a two-locus microsatellite system in the fish Sparus aurata Journal Article Genetics, 150 , pp. 1567–1575, 1998. |
Pelagic tar, dissolved/dispersed petroleum hydrocarbons and plastic distribution in the Cretan Sea, Greece Journal Article Marine Pollution Bulletin, 36 (12), pp. 989–993, 1998, ISSN: 0025326X. |
Ring formation on otoliths and scales of Pagrus pagrus: A comparative study Journal Article Journal of Fish Biology, 52 , pp. 350 – 361, 1998. |
Stress-related pathology seems a significant obstacle for the intensive farming of common dentex, Dentex dentex (linnaeus 1758) Journal Article Bulletin of the European Association of Fish Pathologists, 18 , pp. 15 – 18, 1998. |
The macrofaunal assemblage associated with the scleractinian coral Cladocora caespitosa (L.) in the Aegean Sea Journal Article Annales de l'Institute Oceanographique, 74 (2), pp. 97–114, 1998, ISSN: 00789682. |
Three polymorphic microsatellites in the Japanese oyster, Crassostrea gigas (Thunberg) Journal Article Animal Genetics, 29 , pp. 69 – 70, 1998. |
1997 |
The opercular complex deformity in intensive gilthead sea bream (Sparus aurata L.) larviculture. Moment of apparition and description Journal Article Aquaculture, 156 (1-2), pp. 165–177, 1997, ISSN: 00448486. |
Fatty acids in muscle of wild and farmed red porgy, Pagrus pagrus Journal Article Aquaculture Nutrition, 3 (3), pp. 161–165, 1997, ISSN: 1353-5773, 1365-2095. |
Protein and carbon utilization of rotifers (Brachionus plicatilis) in first feeding of turbot larvae (Scophthalmus maximus L.) Journal Article Aquaculture, 153 (1-2), pp. 103–122, 1997, ISSN: 00448486. |
Normal and abnormal osteological development of caudal fin in Sparus aurata L. fry Journal Article Aquaculture, 149 (3-4), pp. 215–226, 1997, ISSN: 00448486. |
Aquaculture impact on the planktonic system in three fish farms Inproceedings pp. 219–222, 1997, (Publication Title: 5th Pan-Hellenic Symposium of Oceanography and Fisheries). |
Ceratomyxa spp. (myxosporea) infection in cultured common dentex from Greece Journal Article Bulletin of the European Association of Fish Pathologists, 17 , pp. 174 – 176, 1997. |
Biology of Reproduction, 57 (3), pp. 669–675, 1997, ISSN: 00063363. |
Construction of an artificial reef park and creation of a marine protected zone in order to prevent fishing activities off the coasts of Thrace (N. Aegean Sea) Journal Article Fishing News, 197 , pp. 50–55, 1997, ((in Greek)). |
Cyto-histological examination of post-vitellogenesis and final oocyte maturation in captive-reared striped bass Journal Article Journal of Fish Biology, 50 (1), pp. 34–49, 1997, ISSN: 00221112. |
Diel pattern of haematocrit, serum metabolites, osmotic pressure, electrolytes and thyroid hormones in sea bass and sea bream Journal Article Aquaculture International, 5 , pp. 237 – 247, 1997. |
Distribution of nutrients, chloroplastic pigments, POC, PON and ATP in the Cretan Sea (NE Mediterranean): Seasonal and interannual variability Inproceedings pp. 189–193, 1997, (Publication Title: The 5th Pan-Hellenic Symposium of Oceanography and Fisheries). |
Dynamics of the physicochemical parameters in water column and in the sediments of the Gialova lagoon (NW Peloponnese, Ionian Sea) Inproceedings pp. 351–353, Kavala, Greece, 1997, (Publication Title: Seventh Symposium on Oceanography and Fisheries, Κavala). |
Aquaculture, 158 (1-2), pp. 129–140, 1997, ISSN: 00448486. |
Aquaculture, 156 , pp. 145 – 155, 1997. |
Effects of aquaculture in three coastal areas Journal Article Fisheries News, 199 , pp. 90–95, 1997. |