@article {14825, title = {Effect of coastal topography on the spatial structure of the populations of small pelagic fish}, journal = {Marine Ecology Progress SeriesMarine Ecology Progress Series}, volume = {265}, year = {2003}, pages = {243{\textendash}253}, keywords = {Pisces}, author = {Giannoulaki, M. and Machias, A. and Koutsikopoulos, C. and Haralabous, J. and Somarakis, S. and Tsimenides, N.} } @article {14826, title = {The effect of coastal topography on the spatial structure of anchovy and sardine}, journal = {ICES Journal of Marine ScienceICES Journal of Marine Science}, volume = {63}, number = {4}, year = {2006}, note = {Times Cited: 0ArticleEnglishCited References Count: 35043rg}, month = {MAY}, pages = {650-662}, abstract = {Acoustic-survey data from 1995 to 2004 (six acoustic surveys in summer and two in winter) in the Aegean and Ionian Seas (eastern Mediterranean Sea) were analysed to investigate the spatial organization of European anchovy and European sardine populations. The potential effect of certain topographic characteristics (e.g. area, bottom depth, and the degree of land enclosure) on the spatial structure of the fish was studied in different geographic subareas (i.e. how topography affects the organization of fish into clusters of schools). Parameters calculated by geostatistical techniques were used as descriptors of the spatial organization. The results indicate the significant effect of area and land enclosure on the spatial structures of both species, suggesting that environmental spatial heterogeneity attributable to coastal topography affected the way fish schools were organized into aggregations. In summer, the spatial structure of sardine was more heterogeneous in subareas with increased land enclosure, whereas the spatial structure of anchovy was not significantly related to any of the area characteristics examined. In winter, the spatial structure of both species was more heterogeneous in subareas with increased enclosure and in small rather than larger subareas. The findings are discussed in terms of the species{\textquoteright} response to their environment. (c) 2006 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved.}, keywords = {abundance, anchovy, coastal topography, DAILY EGG-PRODUCTION, exhaustive variograms, geostatistics, land enclosure, northern aegean sea, Pisces, populations, sardine, small pelagic fish, stocks, waters}, author = {Giannoulaki, M. and Machias, A. and Koutsikopoulos, C. and Somarakis, S.} } @proceedings {14827, title = {Hydroacoustic investigation on the spatial distribution of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the North Aegean Sea in relation to environmental factors. }, year = {2002}, month = {22-25.5.2002}, pages = {39}, address = {Thessaloniki}, keywords = {kape pisces}, author = {Giannoulaki, M. and Machias, A. and Somarakis, S.} } @article {14828, title = {Wild fish spatial structure in response to presence of fish farms}, journal = {Journal of the Marine Biological Association of the United KingdomJournal of the Marine Biological Association of the United Kingdom}, volume = {85}, number = {05}, year = {2005}, pages = {1271-1277}, publisher = {CambridgeUnivPress}, keywords = {Pisces}, author = {Giannoulaki, M. and Machias, A. and Somarakis, S. and Karakassis, I.} } @article {14829, title = {The spatial distribution of anchovy and sardine in the northern Aegean Sea in relation to hydrographic regimes}, journal = {Belgian Journal of ZoologyBelgian Journal of Zoology}, volume = {135}, number = {2}, year = {2005}, note = {Times Cited: 1ArticleEnglishCited References Count: 20995eu}, month = {JUL}, pages = {151-156}, abstract = {Acoustic survey data were combined with hydrological parameters with the aim of understanding the relationships between the spatial distribution of anchovy and sardine and environmental regimes. Acoustic and concurrent hydrological sampling was carried out in the Northern Aegean Sea (eastern Mediterranean) during June 1995 and June 1996. In order to examine hydrological parameter selection by anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus), cumulative distribution functions were estimated. Both species were significantly associated with areas of deeper surface and upper mixed layers, which implied an association of anchovy and sardine with anticyclones. Within the range of available temperatures and bottom depths, sardine further showed a significant affinity to warm as well as to shallow waters. These results are discussed in relation to species{\textquoteright} life histories and existing knowledge of oceanographic features in the surveyed area.}, keywords = {anchovy, Atlantic, environmental variable selection, fish, northern aegean sea, Pisces, sardine, Spatial distribution}, author = {Giannoulaki, M. and Machias, A. and Somarakis, S. and Tsimenides, N.} } @article {14830, title = {Spatial modeling of the European sardine habitat in the eastern Mediterranean basin suing GIS tools}, journal = {Rapport du Congress de la CIESMRapport du Congress de la CIESM}, volume = {38}, year = {2007}, month = {2007}, pages = {486}, author = {Giannoulaki, M. and Machias, A. and Valavanis, V. and Somarakis, S. and Palialexis, A. and Tsagarakis, K. and Papaconstantinou, C.} } @proceedings {14831, title = {Spatial modelling of the european anchovy habitat in the eastern Mediterranean basin using GAMS and GIS technology}, year = {2006}, month = {26-30.6.2006}, pages = {38}, publisher = {Hellenic Zoological Society}, address = {Patra}, keywords = {kape pisces}, author = {Giannoulaki, M. and Machias, A. and Valavanis, V.D. and Somarakis, S. and Papaconstantinou, C.} } @article {14656, title = {Differential egg production of sardine off the central Hellenic coasts in December 1999. }, journal = {Rapport et Proc{\'e}s-Verbaux des R{\'e}unions de la Commission Internationale pour l{\textquoteright}Exploration Scientifique de la Mer M{\'e}diterran{\'e}eRapport et Proc{\'e}s-Verbaux des R{\'e}unions de la Commission Internationale pour l{\textquoteright}Exploration Scientifique de la Mer M{\'e}diterran}, volume = {36}, year = {2001}, pages = {268}, keywords = {Pisces}, author = {Ganias, K. and Somarakis, S. and Caragitsou, E. and Koutsikopoulos, C. and Machias, A. and Theodorou, A.} } @proceedings {14657, title = {Seasonal variation and organ weight indices of sardine in the Aegean and Ionian Seas. }, year = {2002}, month = {22-25.5.2002}, pages = {37}, address = {Thessaloniki}, keywords = {kape pisces}, author = {Ganias, K. and Somarakis, S. and Koutsikopoulos, C. and Machias, A. and Theodorou, A.} } @article {14658, title = {Ovarian atresia in the Mediterranean sardine, Sardina pilchardus sardina}, journal = {Journal of the Marine Biological Association of the United KingdomJournal of the Marine Biological Association of the United Kingdom}, volume = {83}, number = {06}, year = {2004}, pages = {1327-1332}, publisher = {CambridgeUnivPress}, keywords = {Pisces}, author = {Ganias, K. and Somarakis, S. and Koutsikopoulos, C. and Machias, A. and Theodorou, A.} } @article {14659, title = {Pattern of oocyte development and batch fecundity in the Mediterranean sardine}, journal = {Fisheries ResearchFisheries Research}, volume = {67}, number = {1}, year = {2004}, note = {Times Cited: 3ArticleEnglishCited References Count: 47775ju}, month = {MAR}, pages = {13-23}, abstract = {In the present study, the pattern of oocyte development was investigated in the Mediterranean sardine (Sardina pilchardus sardina) in order to examine whether non-hydrated females could be included in batch fecundity measurements. Gonad histology and frequency distributions of oocyte diameters demonstrated that the Mediterranean sardine exhibits group-synchronous type of oocyte development. The spawning batch begins to separate in size from the adjacent population of smaller oocytes at the secondary yolk globule stage and a well-developed size-hiatus is established at the tertiary yolk globule stage. The spawning batch could be clearly identified prior to hydration and batch fecundity-on-fish weight relationships did not differ significantly between hydrated females and females at the tertiary and migratory nucleus stages. Thus, apart from hydrated females, batch fecundity in the Mediterranean sardine may also be measured by the use of females at the tertiary and migratory nucleus stages. Relative fecundity was shown to be independent of body weight and its estimates during the respective peak spawning months for the Aegean Sea and Ionian Sea stocks were 360 eggs/g (December 2000) and 339 eggs/g (February 2001). (C) 2003 Elsevier B.V. All rights reserved.}, keywords = {anchovy, batch fecundity, egg-production method, estimating biomass, fishes, Florida, group-synchronous, mediterranean sardine, oocyte development, ovarian development, Pisces, reproductive-biology, sagax, sardina pilchardus sardina, size, spawning frequency}, author = {Ganias, K. and Somarakis, S. and Machias, A. and Theodorou, A.} } @article {14660, title = {Evaluation of spawning frequency in a Mediterranean sardine population (Sardina pilchardus sardina)}, journal = {Marine BiologyMarine Biology}, volume = {142}, number = {6}, year = {2003}, pages = {1169-1179}, publisher = {Springer}, keywords = {Pisces}, author = {Ganias, K. and Somarakis, S. and Machias, A. and Theodorou, A. J.} } @article {13246, title = {Discarding practices in a Mediterranean small-scale fishing fleet (Patraikos Gulf, Greece)}, journal = {Fisheries Management and EcologyFisheries Management and EcologyFisheries Management and Ecology}, volume = {14}, number = {4}, year = {2007}, note = {ISI Document Delivery No.: 201RATimes Cited: 7Cited Reference Count: 26}, month = {Aug}, pages = {277-285}, type = {Article}, abstract = {Discarding practices from 110 fishing operations in a Mediterranean small-scale fishing fleet (Patraikos Gulf, western Greece) from August 2004 to July 2005 were analysed. On average, I kg of fish was discarded per fishing operation (10\% of the catch). The reasons for discarding were: low commercial value (78\% of discards), damage at sea before retrieval of the gear (5\%), and bad handling on-board (17\%). More than half of discards belonged to Spicaraflexuosa (L.), Lepidopus caudatus (Euphrasen), Sardinella aurita Valenciennes and Merluccius merluccius (L.). The bulk of discards of each species were associated with a single fishing method (metier). A Generalized Linear Model (Delta-X - error-model) indicated that, when discards were present, significant differences existed in the discard ratio among different metier groups (groups comprising metiers with similar characteristics). Longlines and trammel nets with small mesh-sizes had the highest discard ratios. Discarding practices for the species Diplodus annularis (L.), S. aurita, Squilla mantis (L.), S.flexuosa and Scorpaena scrofa (L.) did not follow a consistent pattern (these species were either fully discarded or fully retained during a fishing operation). The decision seemed to be dependent on market demands rather than fish size. Significant correlation was found between discarded and catch weight, but the presence of many outliers indicated deviance from a case where discards are high when there is an abundant catch. The findings of the study imply that monitoring and management should be carried out preferably on the metier level. Discards could be reduced by technical measures, controlling effort regulations and by improving working conditions on-board fishing vessels.}, keywords = {bycatch, catch, discards, fishery, GILL NET, Greece, management, Mediterranean, north-sea, Patraikos Gulf, Small-scale fisheries, TRAWL DISCARDS}, isbn = {0969-997X}, author = {Tzanatos, E. and Somarakis, S. and Tserpes, G. and Koutsikopoulos, C.} } @article {13247, title = {Catch length analysis, relation to minimum landing sizes and management implications from a Mediterranean small-scale fisheril (Patraikos Gulf, Greece)}, journal = {Fisheries ResearchFisheries ResearchFisheries Research}, volume = {93}, number = {1-2}, year = {2008}, note = {ISI Document Delivery No.: 345KGTimes Cited: 2Cited Reference Count: 34}, month = {Sep}, pages = {125-134}, type = {Article}, abstract = {Fisheries management in the Mediterranean is planned on the basis of fishing effort allocation, gear technical characteristics and minimum landing sizes (MLSs), the latter being a measure recently updated in the EU Mediterranean fisheries policy. Very few elements on the evaluation of the MLS in regard to the catch and landings of the small-scale fisheries in the Mediterranean exist and this is due to both the great heterogeneity of the sector and the lack of systematic monitoring. The catch length composition of five species (Merluccius merluccius, Diplodus annularis, Mullus barbatus, Sepia officinalis and Squilla mantis) from a yearly record of small-scale fishing operations in the Patraikos Gulf(w. Greece, e. Mediterranean) was associated with temporal (season), spatial (depth of fishing, substrate type) and fishery (metier) characteristics by means of general linear models. Smaller individuals appeared in the catch in autumn for all five species indicating this season as suitable if a seasonal fishery Closure was established. When length was found to be significantly different between different metiers this was either due to smaller mesh sizes (M. barbatus) or due to gear type (M. merluccius). For all species except S. officinalis, depth significantly affected length of individuals in the catch providing in the case of M. merluccius a clear association of bigger individuals with deeper fishing grounds. Substrate types also affected the length for the species D. annularis, M. barbatus. In relation to MLSs, the sizes of Mullus surmuletus and Scomber japonicus were fully legal, M. merluccius, M. barbatus, Solea vulgaris, Trachurus mediterraneus, Pagellus erythrinus had higher than 80\% of the catch over MLS, while D. annularis, Diplodus sargus, Sparus aurata and Pagellus acarne had high fractions of the total catch below MLS. The metiers where undersized individuals appear were identified. Further management implications of the findings are discussed taking into account the current management scheme and the discarding practices in the area. (c) 2008 Elsevier B.V. All rights reserved.}, keywords = {Aegean sea, Demersal fish, DIPLODUS-ANNULARIS, EUROPEAN HAKE, GILL NET SELECTIVITY, Greece, HAKE MERLUCCIUS-MERLUCCIUS, length composition, management, Mediterranean, minimum landing, MULLUS-SURMULETUS, season, size, Small-scale fisheries, Species composition, TRAMMEL-NET, trends}, isbn = {0165-7836}, author = {Tzanatos, E. and Somarakis, S. and Tserpes, G. and Koutsikopoulos, C.} } @article {13079, title = {Food-web traits of the North Aegean Sea ecosystem (Eastern Mediterranean) and comparison with other Mediterranean ecosystems}, journal = {Estuarine, Coastal and Shelf ScienceEstuarine, Coastal and Shelf Science}, volume = {88}, number = {2}, year = {2010}, note = {Cited By (since 1996): 1Export Date: 8 November 2011Source: Scopus}, pages = {233-248}, author = {Tsagarakis, K. and Coll, M. and Giannoulaki, M. and Somarakis, S. and Papaconstantinou, C. and Machias, A.} } @article {13080, title = {Seasonal and temporal trends in metrics of fish community for otter-trawl discards in a Mediterranean ecosystem}, journal = {ICES Journal of Marine ScienceICES Journal of Marine Science}, volume = {65}, number = {4}, year = {2008}, month = {May}, pages = {539-550}, isbn = {1054-3139}, author = {Tsagarakis, K. and Machias, A. and Giannoulaki, M. and Somarakis, S. and Karakassis, I.} } @article {12429, title = {Can we define target species in Mediterranean trawl fisheries?}, journal = {Fisheries ResearchFisheries Research}, volume = {59}, year = {2003}, pages = {431-435}, keywords = {kape pisces}, author = {Stergiou, I. K. and Machias, A. and Somarakis, S. and Kapantagakis, A.} } @article {12086, title = {Fluctuating asymmetry in the otoliths of larval anchovy Engraulis encrasicolus and the use of developmental instability as an indicator of condition in larval fish.}, journal = {Marine Ecology Progress SeriesMarine Ecology Progress Series}, volume = {151}, number = {1-3}, year = {1997}, pages = {191-203}, author = {Somarakis, S. and Kostikas, I. and Peristeraki, N. and Tsimenides, N.} } @article {12087, title = {Fluctuating asymmetry in the otoliths of larval fish as an indicator of condition. Justification and preliminary field evidence.}, journal = {Fisheries Society of the British IslesFisheries Society of the British Isles}, year = {1997}, pages = {50pp.}, author = {Somarakis, S. and Kostikas, I. and Tsimenides, N.} } @article {12088, title = {Age, growth and bathymetric distribution of red pandora (Pagellus erythrinus) on the Cretan shelf (eastern Mediterranean)}, journal = {Journal of the Marine Biological Association of the United KingdomJournal of the Marine Biological Association of the United Kingdom}, volume = {82}, number = {01}, year = {2002}, pages = {149-160}, publisher = {CambridgeUnivPress}, keywords = {Pisces}, author = {Somarakis, S. and Machias, A.} } @article {12089, title = {Covariation in mean abundance of larval Myctophids and zooplankton biovolumes in the NE Aegean Sea. }, journal = {Rapport et Proc{\'e}s-Verbaux des R{\'e}unions de la Commission Internationale pour l{\textquoteright}Exploration Scientifique de la Mer M{\'e}diterran{\'e}eRapport et Proc{\'e}s-Verbaux des R{\'e}unions de la Commission Internationale pour l{\textquoteright}Exploration Scientifique de la Mer M{\'e}diterran}, volume = {36}, year = {2001}, pages = {325}, keywords = {marine}, author = {Somarakis, S. and Maraveya, E.} } @article {12090, title = {Multispecies ichthyoplankton associations in epipelagic species: is there any intrinsic adaptive function}, journal = {Belgian Journal of ZoologyBelgian Journal of Zoology}, volume = {130}, number = {1}, year = {2000}, pages = {125-129}, keywords = {Pisces}, author = {Somarakis, S. and Maraveya, E. and Tsimenides, N.} } @proceedings {12091, title = {A multispecies ichthyoplankton association in epipelagic species: does it have an intrinsic adaptive function?}, year = {1999}, month = {17-21 May 1999}, pages = {134}, publisher = {Hellenic Zoological Society}, address = {Kavala}, keywords = {kape pisces}, author = {Somarakis, S. and Maraveya, E. and Tsimenidis, N.} } @proceedings {12082, title = {Marked interannual differences in reproductive parameters and daily egg production of anchovy (Engraulis encrasicolus) in the northern Aegean Sea. }, year = {2002}, month = {22-25.5.2002}, pages = {139}, address = {Thessaloniki}, keywords = {kape pisces}, author = {Somarakis, S.} } @article {12083, title = {Distribution and abundance of larval fish in the northern Aegean Sea{\textemdash}eastern Mediterranean{\textemdash}in relation to early summer oceanographic conditions}, journal = {Journal of Plankton ResearchJournal of Plankton Research}, volume = {24}, number = {4}, year = {2002}, pages = {339-358}, keywords = {Pisces}, author = {Somarakis, S. and Drakopoulos, P. and Filippou, V.} } @article {12084, title = {Spawning habitat and daily egg production of sardine (Sardina pilchardus) in the eastern Mediterranean}, journal = {Fisheries OceanographyFisheries Oceanography}, volume = {15}, number = {4}, year = {2006}, note = {Times Cited: 0ArticleEnglishCited References Count: 45048nt}, pages = {281-292}, abstract = {Spawning habitats of two eastern Mediterranean sardine, Sardina pilchardus (Walbaum, 1792), stocks ( coastal waters of central Aegean and Ionian Seas) are characterized from daily egg production method (DEPM) surveys conducted during the peak of the spawning period. The latter occurs earlier in the Aegean Sea ( December) than in the less-productive Ionian Sea ( February). Single-parameter quotient analysis showed that the preferred bottom depth for spawning was 40-90 m in both areas but sardine selected sites of increased zooplankton in the Aegean Sea during December and increased fluorescence in the Ionian Sea during February. Estimates of daily egg production (P) and spawning stock biomass ( B) were about four times lower for the Ionian Sea (P 7.81 eggs m(-2), B = 3652 tonnes) than the Aegean Sea (P=27.52 eggs m(-2), B = 16 174 tonnes). We suggest that zooplankton biomass might not be sufficient to support sardine reproduction in the highly oligotrophic Ionian Sea where the very small sardine stock may rely on the late-winter phytoplankton bloom. Actively selecting sites with increased zooplankton or phytoplankton and feeding plasticity (the well-known switching from selective particle feeding to non-selective filter feeding in sardines) are interpreted as adaptations to grow and reproduce optimally at varying prey conditions. Despite differences in temperature and productivity regimes, reproductive performance of sardine in the Ionian Sea was very similar to that in the Aegean Sea during the peak of the spawning period. In comparing adult parameters from DEPM applications to Sardina and Sardinops stocks around the world, a highly significant linear relation emerged between mean batch fecundity ( F) and mean weight of mature female ( W, g) (F = 0.364W, r(2) = 0.98). The latter implies that, during the peak of the spawning period, mean relative batch fecundity (eggs g(-1)) of sardine is fairly constant in contrasting ecosystems around the world.}, keywords = {anchovy, batch fecundity, biomass, eastern Mediterranean, Egg production, fish, Pisces, sagax, sardine, sea, single-parameter quotient analysis, walbaum, waters}, author = {Somarakis, S. and Ganias, K. and Siapatis, A. and Koutsikopoulos, C. and Machias, A. and Papaconstantinou, C.} } @article {12085, title = {Larval fish assemblages in coastal waters of central Greece: Reflections of topographic and oceanographic heterogeneity}, journal = {Scientia MarinaScientia Marina}, volume = {75}, number = {3}, year = {2011}, note = {Export Date: 8 November 2011Source: Scopus}, pages = {605-618}, author = {Somarakis, S. and Isari, S. and Machias, A.} } @inbook {12093, title = {Fisheries independent assessment methods: daily egg production method}, booktitle = {State of Hellenic Fisheries}, year = {2007}, pages = {350-355}, isbn = {978-960-98054-1-4}, author = {Somarakis, S. and Siapatis, A.}, editor = {Papaconstantinou, C. and Zenetos, A. and Vassilopoulou, V. and Tserpes, G.} } @inbook {11813, title = {Early life history of fish}, booktitle = {State of Hellenic Fisheries}, year = {2007}, pages = {54-61}, isbn = {978-960-98054-1-4}, author = {Siapatis, A. and Somarakis, S.}, editor = {Papaconstantinou, C. and Zenetos, A. and Vassilopoulou, V. and Tserpes, G.} } @proceedings {11465, title = {Reproductive parameters and somatic condition of anchovy, Engraulis encrasicolus (L., 1758) from the north eastern Aegean sea}, year = {2006}, month = {26-30.6.2006}, pages = {79}, publisher = {Hellenic Zoological Society}, address = {Patra}, keywords = {kape pisces}, author = {Schismenou, E. and Kallianiotis, A. and Machias, A. and Somarakis, S.} } @proceedings {10790, title = {Hydrology and biological features in the coastal areas of central Greece during the anchovy spawning period}, volume = {2}, year = {2000}, pages = {88{\textendash}93}, keywords = {Pisces}, author = {Ramfos, A. and Koutsikopoulos, K. and Fragopoulou, N. and Machias, A. and Somarakis, S. and Pyrovolaki, E. and Lykakis, I.} } @article {10791, title = {Summer mesozooplankton distribution in coastal waters of central Greece (eastern Mediterranean). 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Copepod assemblages (1997) Oceanologica Acta, 20, pp. 537-548; Siokou-Frangou, I., Panayotidis, P., Papathanassiou, E., Zooplankton composition of south Evoikos (Aegean Sea, Greece) during February and July 1982 (1984) Thalassographica, 7, pp. 27-38; Siokou-Frangou, I., Papathanassiou, E., Differentiation of zooplankton populations in a polluted area (1991) Marine Ecology Progress Series, 76, pp. 41-51; Siokou-Frangou, I., Papathanassiou, E., Lepretre, A., Frontier, S., Zooplankton assemblages and influence of environmental parameters on them in a Mediterranean coastal area (1998) Journal of Plankton Research, 20, pp. 847-870; Somarakis, S., Drakopoulos, P., Filippou, V., Distribution and abundance of larval fish in the northern Aegean Sea-eastern Mediterranean in relation to early summer oceanographic conditions (2002) Journal of Plankton Research, 24, pp. 339-357; Stergiou, K.I., Christou, E.D., Georgopoulos, D., Zenetos, A., Souvermezoglou, E., The Hellenic Seas: Physics, chemistry, biology and fisheries (1997) Oceanography and Marine Biology. Annual Review, 35, pp. 413-538; Valdes, J.L., Moral, M., Time-series analysis of copepod diversity and species richness in the southern Bay of Biscay off Santander, Spain, in relation to environmental conditions (1998) ICES Journal of Marine Science, 55, pp. 783-792.}, month = {2005///}, pages = {765-774}, abstract = {Mesozooplankton distribution was investigated over an intensive grid of 124 stations in coastal and pelagic waters of central Greece (eastern Mediterranean) during July 1998. The complex topography of the area consisted of various semi-enclosed gulfs as well as open-sea areas and provided excellent fieldwork for determining species assemblages, their relationships to environmental parameters and the distribution and abundance patterns of the copepod species. Three coastal and one pelagic group of stations were revealed by cluster analysis. Inverse analysis of species affinities defined distinct {\textquoteright}coastal{\textquoteright} and {\textquoteright}pelagic{\textquoteright} species assemblages. All coastal areas were dominated by a small number of species (e.g. Penilia avirostris, Podon spp., Ctenocalanus vanus, Paracalanus parvus and Centropages typicus) all belonging to the {\textquoteright}coastal{\textquoteright} assemblage. Differences among these coastal areas were mainly due to small changes in relative abundance of a common-species list. On the contrary, pelagic stations were characterized by higher species diversity, low dominance and the presence of characteristic epipelagic and mesopelagic species of the Mediterranean Sea (e.g. Calocalanus spp., Haloptilus longicornis, Lucicutia flavicornis, Mecynocera clausi, Farranula rostrata, Mesocalanus tenuicornis and Oncaea mediterranea). The observed differences in taxonomic composition and abundance of zooplankton were related to the marked differences in salinity values observed between the eastern and western part of the surveyed area. Bathymetry, temperature and fluorescence were also related with the inshore-offshore gradient of the zooplankton community observed in the pelagic areas as well as with the discrimination of the zooplankton communities of the various semi-enclosed gulfs of the region.}, keywords = {marine}, author = {Ramfos, A. and Somarakis, S. and Koutsikopoulos, C. and Fragopoulu, N.} } @article {10792, title = {Summer mesozooplankton distribution in coastal waters of central Greece (eastern Mediterranean). I. Hydrology and group composition}, journal = {Journal of the Marine Biological Association of the United KingdomJournal of the Marine Biological Association of the United Kingdom}, volume = {85}, number = {4}, year = {2005}, note = {Cited By (since 1996): 2Export Date: 4 September 2006Source: ScopusReferences: Alldredge, A.L., The impact of appendicularian grazing on natural food concentrations in situ (1981) Limnology and Oceanography, 26, pp. 247-257; Azov, Y., Eastern Mediterranean - A marine desert? (1991) Marine Pollution Bulletin, 23, pp. 225-232; Christou, E.D., Interannual variability of copepods in a Mediterranean coastal area (Saronikos Gulf, Aegean Sea) (1998) Journal of Marine Systems, 15, pp. 523-532; Christou, E.D., Stergiou, K.I., Modelling and forecasting the fortnightly cladoceran abundance in the Saronikos Gulf (Aegean Sea) (1998) Journal of Plankton Research, 20, pp. 1313-1320; Christou, K.D., Zervoudaki, S., Mesozooplankton coupling with hydrology in the Aegean, during September 1998 (2000) Proceedings of the 6th National Symposium of Oceanography and Fisheries, Chios, Greece, 23-26 May 2000, 1, pp. 221-225. , Athens: National Centre for Marine Research; Cullen, J.J., Eppley, R.W., Chlorophyll maximum layers of the southern California Bight and possible mechanisms of their formation and maintenance (1981) Oceanologica Acta, 4, pp. 23-32; Estrada, M., Marrase, C., Latasa, M., Berdalet, E., Delgado, M., Riera, T., Variability of deep chlorophyll maximum characteristics in the northwestern Mediterranean (1993) Marine Ecology Progress Series, 92, pp. 289-300; Fragopoulu, N., Lykakis, J.J., Vertical distribution and nocturnal migration of zooplankton in relation to the development of the seasonal thermocline in Patraikos Gulf (1990) Marine Biology, 104, pp. 381-387; Friligos, N., Theocharis, A., Georgopoulos, D., Preliminary chemical and physical observations during summer 1980 on a silled embayment in the Ionian Sea (1985) Vie et Milieu, 35, pp. 115-125; Gaudy, R., Champalbert, G., Space and time variations in zooplankton distribution south of Marseilles (1998) Oceanologica Acta, 21, pp. 793-802; Gaudy, R., Youssara, F., Diaz, K., Raimbault, P., Biomass, metabolism and nutrition of zooplankton in the Gulf of Lions (NW Mediterranean) (2003) Oceanologica Acta, 26, pp. 357-372; Herut, B., Almogi-Labin, A., Jannink, N., Gertman, I., The seasonal dynamics of nutrient and chlorophyll a concentrations on the SE Mediterranean shelf slope (2000) Oceanologica Acta, 23, pp. 771-782; Kouwenberg, J.H.M., Copepod distribution in relation to seasonal hydrographics and spatial structure in the Northwestern Mediterranean (Golfe du Lion) (1994) Estuarine, Coastal and Shelf Science, 38, pp. 69-90; Lascaratos, A., Salusti, E., Papageorgaki, G., Wind-induced upwellings and currents in the Gulfs of Patras, Nafpaktos and Korinthos, Western Greece (1989) Oceanologica Acta, 12, pp. 159-164; Lykousis, V., Major outputs of the recent multidisciplinary biogeochemical researches undertaken in the Aegean Sea (2002) Journal of Marine Systems, 33-34, pp. 313-334; Mazzocchi, M.G., Christou, L.D., Fragopoulu, N., Siokou-Frangou, I., Mesozooplankton distribution from Sicily to Cyprus (Eastern Mediterranean): General aspects (1997) Oceanologica Acta, 20, pp. 521-535; Mazzocchi, M.G., Ribera D{\textquoteright}Alcala, M., Recurrent patterns in zooplankton structure and succession in a variable coastal environment (1995) ICES Journal of Marine Science, 52, pp. 679-691; (1992) Oceanographic Study of North Evoikos Gulf, , National Centre for Marine Research, Athens, Greece, CM1992; Poulos, S.E., Collins, M.B., Pattiaratchi, C., Cramp, A., Gull, W., Tsimplis, M., Papatheodorou, G., Oceanography and sedimentation in the semi-enclosed, deep-water Gulf of Corinth (Greece) (1996) Marine Geology, 134, pp. 213-235; Poulos, S.E., Drakopoulos, P.G., Collins, M.B., Seasonal variability in sea surface oceanographic conditions in the Aegean Sea (Eastern Mediterranean): An overview (1997) Journal of Marine Systems, 13, pp. 225-244; Psarra, S., Tselepides, A., Ignatiades, L., Primary productivity in the oligotrophic Cretan Sea (NE Mediterranean): Seasonal and interannual variability (2000) Progress in Oceanography, 46, pp. 187-204; Raimbault, P., Coste, B., Boulhadid, M., Boudjellal, B., Origin of high phytoplankton concentration in deep chlorophyll maximum (DCM) in a frontal region of the southwestern Mediterranean Sea (Algerian current) (1993) Deep-Sea Research I, 40, pp. 791-804; Ramfos, A., Somarakis, S., Koutsikopoulos, C., Fragopoulu, N., Summer mesozooplankton distribution in coastal waters of central Greece (eastern Mediterranean). II. Species assemblages (2005) Journal of the Marine Biological Association of the United Kingdom, 85, pp. 765-774; Razouls, C., Kouwenberg, J.H.M., Spatial distribution and seasonal variation of mesozooplankton biomass in the Gulf of Lions (northwestern Mediterranean) (1993) Oceanologica Acta, 16, pp. 393-401; Scotto Di Carlo, B., Ianora, A., Mazzocchi, M.G., Scardi, M., Atlantis II Cruise: Uniformity of deep copepod assemblages in the Mediterranean Sea (1991) Journal of Plankton Research, 13, pp. 263-277; Siokou-Frangou, I., (1993) Mesozooplankton Ecology in Saronikos Gulf, , PhD thesis, University of Athens, Athens, Greece; Siokou-Frangou, I., Zooplankton annual cycle in a Mediterranean coastal area (1996) Journal of Plankton Research, 18, pp. 203-223; Siokou-Frangou, I., Carbon flow in the planktonic food web along a gradient of oligotrophy in the Aegean Sea (2002) Journal of Marine Systems, 33-34, pp. 335-353; Siokou-Frangou, I., Panayotidis, P., Papathanassiou, E., Zooplankton composition of south Evoikos (Aegean Sea, Greece) during February and July 1982 (1984) Thalassographica, 7, pp. 27-30; Stergiou, K.I., Christou, E.D., Georgopoulos, D., Zenetos, A., Souvermezoglou, E., The Hellenic Seas: Physics, chemistry, biology and fisheries (1997) Oceanography and Marine Biology. Annual Review, 35, pp. 413-538; Theocharis, A., Georgopoulos, D., Lascaratos, A., Nittis, K., Water masses and circulation in the central region of the Eastern Mediterranean: Eastern Ionian, South Aegean and Northwest Levantine, 1986-1987 (1993) Deep-Sea Research II, 40, pp. 1121-1142; Townsend, D.W., Christensen, J.P., Berman, T., Walline, P., Schneller, A., Yentsch, S., Near-bottom chlorophyll maxima in southeastern Mediterranean shelf waters: Upwelling and sediments as a possible nutrient sources (1988) Oceanologica Acta, SP, pp. 235-244; Turner, J.T., Tester, P.A., Ferguson, R.L., The marine cladoceran Penilia avirostris and the microbial loop of the pelagic food webs (1988) Limnology and Oceanography, 33, pp. 245-255; Youssara, F., Gaudy, R., Variations of zooplankton in the frontal area of the Alboran Sea (Mediterranean Sea) in winter 1997 (2001) Oceanologica Acta, 24, pp. 361-376; Zar, J.H., (1984) Biostatistical Analysis, 2nd Edn., , Englewood Cliffs, New Jersey: Prentice-Hall.}, month = {2005///}, pages = {755-764}, abstract = {Zooplankton and hydrography of the upper 200 m was studied in coastal and pelagic waters off central Greece (eastern Mediterranean) during July 1998. The spatial distribution of the main environmental (temperature, salinity, fluorescence) and zooplankton (abundance, dry-weight, dominant groups) features of the area was delimited over an intense grid of 124 stations. The complex topography of the surveyed area comprised an interesting field for the study of pelagic-coastal interaction and its influence on the taxonomic composition of zooplankton. A typical summer thermal stratification was observed over the entire study area. Marked differences were found in surface-salinity between the eastern (Aegean Sea) and the western (Ionian Sea) part of the study area, which was attributed to the presence of less saline waters originating from the Black Sea. A deep fluorescence maximum was present in both coastal and pelagic stations. Zooplankton abundance and biomass showed an inshore-offshore gradient with coastal areas being significantly richer than pelagic areas. The taxonomic composition of zooplankton varied greatly both along the inshore-offshore gradient and among the different semi-enclosed Gulfs. Copepods were the dominant group in the pelagic waters comprising 67-78\% in terms of mean relative abundance. In coastal areas, copepods were less important with cladocerans (especially the species Penilia avirostris) being the dominant group (44-51\%). Appendicularians and chaetognaths comprised an important component of the zooplankton community over the entire surveyed area with mean relative abundance ranging from 2.5 to 14\% and 0.6 to 5.8\%, respectively.}, keywords = {marine}, author = {Ramfos, A. and Somarakis, S. and Koutsikopoulos, C. and Fragopoulu, N.} } @proceedings {10793, title = {Mesozooplankton characteristics in coastal and offshore water of central Greece (eastern Mediterranean) during winter 1999}, year = {2006}, month = {26-30.6.2006}, pages = {76}, publisher = {Hellenic Zoological Society}, address = {Patra}, keywords = {KAPE Marine}, author = {Ramfos, A. and Theodoropoulos, C. and Karagianni, I. and Somarakis, S. and Koutsikopoulos, C. and Frangopoulou, N.} } @proceedings {9590, title = {Aspects of the ecology of the early life stages of ancovy, Engraulis encrasicolus (L., 1758), in the north east Aegean sea}, year = {2006}, month = {26-30.6.2006}, pages = {65}, publisher = {Hellenic Zoological Society}, address = {Patra}, keywords = {kape pisces}, author = {Nikolioudakis, N. and Machias, A. and Somarakis, S.} } @article {9271, title = {Batch fecundity of anchovy, Engraulis encrasicolus, in the NE Aegean Sea.}, journal = {Rapport et Proc{\'e}s-Verbaux des R{\'e}unions de la Commission Internationale pour l{\textquoteright}Exploration Scientifique de la Mer M{\'e}diterran{\'e}eRapport et Proc{\'e}s-Verbaux des R{\'e}unions de la Commission Internationale pour l{\textquoteright}Exploration Scientifique de la Mer M{\'e}diterran}, volume = {36}, year = {2001}, pages = {299}, keywords = {Pisces}, author = {Maraveya, E. and Somarakis, S. and Machias, A.} } @inbook {8963, title = {Small pelagics fish}, booktitle = {State of Hellenic Fisheries}, year = {2007}, pages = {192-207}, isbn = {978-960-98054-1-4}, author = {Machias, A. and Giannoulaki, M. and Somarakis, S. and Siapatis, A.}, editor = {Papaconstantinou, C. and Zenetos, A. and Vassilopoulou, V. and Tserpes, G.} } @article {8964, title = {Response of demersal fish communities to the presence of fish farms}, journal = {Marine Ecology Progress SeriesMarine Ecology Progress Series}, volume = {288}, year = {2005}, note = {Times Cited: 6ArticleEnglishCited References Count: 53916og}, pages = {241-250}, abstract = {The hypothesis that the presence of fish farms affects the communities of wild fish at large spatial scales was investigated through experimental trawl surveys. Three regions of the Aegean Sea with aquaculture zones were sampled in May and September (reproductive and recruitment periods, respectively for most species in the Aegean Sea). In each region, 2 sub-areas were sampled: 1 located nearby the fish farming zones (within 2 to 3 n mile) and a similar site ({\textquoteright}reference site{\textquoteright}) far away from these zones (> 20 n mile). Three replicate hauls were made in each sub-area for each of the 3 investigated regions. Significant differences were observed in community structure between farming and reference sites, which were mainly due to quantitative rather than qualitative aspects, The overall abundance and/or biomass of wild demersal fish was significantly higher near the fish farms in every region studied during May without any significant change in diversity or biodiversity. During the recruitment period in September, total abundance and biomass were fairly similar. These findings support the hypothesis that the presence of fish farms affects the wild fish populations in the oligotrophic eastern Mediterranean at a spatial scale larger than the immediate vicinity of fish cages. It seems that during the recruitment period all sites were stocked with fish close to the carrying capacity of the respective areas, and by late spring the areas close to fish farming zones had suffered little losses during winter, whereas populations at the reference sites had decreased substantially.}, keywords = {aquaculture, bathymetric distribution, CAGE FARM, CHEMICAL FLUXES, coastal sediments, Environmental impacts, Fish communities, fisheries, mass balances, Mediterranean, mediterranean-sea, Pisces, seagrass posidonia-oceanica, Taxonomic distinctness, wild fish}, author = {Machias, A. and Karakassis, I. and Giannoulaki, M. and Papadopoulou, K. N. and Smith, C. J. and Somarakis, S.} } @article {8965, title = {Changes in wild fish assemblages after the establishment of a fish farming zone in an oligotrophic marine ecosystem}, journal = {Estuarine, Coastal and Shelf ScienceEstuarine, Coastal and Shelf Science}, volume = {60}, number = {4}, year = {2004}, note = {Times Cited: 8ArticleEnglishCited References Count: 55845jt}, month = {AUG}, pages = {771-779}, abstract = {The species composition, abundance and diversity of demersal fish assemblages has been investigated in an oligotrophic coastal bay in the Aegean Sea which is a designated zone for the development of aquaculture. Samples were collected using experimental trawling, before the establishment of fish cages in the area during early June 1987 and after attaining the maximal production of the aquaculture zone in late May 2001. The overall abundance of the fish assemblage increased by a factor of 4 and the average trophic level of the fish community increased from 3.59 to 3.79. Traditional diversity indices showed an increase in dominance but the distinctness measures of biodiversity showed that the overall structure obtained after the establishment of fish farming was not phylogenctically impoverished. Multivariate analysis showed that the community differences between the two periods are quantitative rather than qualitative. Comparisons in length frequencies between the two periods indicated that specimens of the species compared were either similar or larger in the second period. The species favoured by the presence of aquaculture were not the ones normally feeding on the food pellets under the cages but those normally occurring in the fishing grounds of the study. It is concluded that the release of nutrients from fish farming in nutrient-poor systems can have a positive effect on local fisheries with no visible negative change in species composition or biodiversity. (C) 2004 Elsevier Ltd. All rights reserved.}, keywords = {aquaculture, biodiversity, CAGE FARM, CHEMICAL FLUXES, coastal sediments, Community structure, diversity, Environmental impact, fisheries, impact, mass balances, Mediterranean, mediterranean-sea, Pisces, seagrass posidonia-oceanica, Taxonomic distinctness}, author = {Machias, A. and Karakassis, I. and Labropoulou, M. and Somarakis, S. and Papadopoulou, K. N. and Papaconstantinou, C.} } @article {8967, title = {Settlement of the wreckfish (Polyprion americanus)}, journal = {Marine BiologyMarine Biology}, volume = {142}, number = {1}, year = {2003}, note = {Export Date: 5 September 2006Source: ScopusReferences: Alexander, R.Mc.N., Functional design in fishes (1970) Swimming, pp. 19-45. , Hutchinson, London; (2001) The State of the European Wreckfish (Polyprion americanus) Stocks, , Report to the EU (DGXIV), project 98/041. European Commission, Brussels; Ball, A.O., Sedberry, G.R., Zatcoff, M.S., Chapman, R.W., Carlin, J.L., Population structure of wreckfish Polyprion americanus determined with microsatellite genetic markers (2000) Mar Biol, 137, pp. 1077-1090; Bombace, G., Ittiofauna e produzione terziaria del coralligeno di substrato duro della costa settentrionale di Sicilia (1972) Quad Lab Tecnol Pesca, 3, pp. 23-37; Cop, H.G., Kovac, V., When do fish with indirect development become juveniles? (1996) Can J Fish Aquat Sci, 53, pp. 746-752; Fischer, W., Bauchot, M.L., Schneider, M., (1987) Fiche FAO d{\textquoteright}Identification des Espe?ces pour les Besoins de la Pe?che, Rev 1. Me?diterrane?e et Mer Noire (Zone de Pe?che 37), , FAO, Rome; Fryer, R.I., A model of between-haul variation in selectivity (1991) ICES J Mar Sci, 48, pp. 281-290; Fuiman, L.A., Growth gradients in fish larvae (1983) J Fish Biol, 23, pp. 117-123; Fuiman, L.A., Poling, K.R., Higgs, D.M., Quantifying developmental progress for comparative studies of larval fishes (1998) Copeia, 3, pp. 602-611; Fukuhara, O., Morphological and functional development of larval and juvenile Limanda yokohamae (Pisces: Pleuronectidae) reared in the laboratory (1988) Mar Biol, 99, pp. 271-281; Hewitt, R., The value of pattern in the distribution of young fish (1981) Rapp P-V Reun Cons Int Explor Mer, 178, pp. 229-236; Karakassis, I., Eleftheriou, A., The continental shelf of Crete: Structure of macrobenthic communities (1997) Mar Ecol Prog Ser, 160, pp. 185-196; Kentouri, M., Papandroulakis, N., Divanach, P., Species diversification in Greek finfish mariculture (1995) Cah Options Mediterr, 14, pp. 129-136; Kingsford, M.J., Biotic and abiotic structure in the pelagic environment: Importance to small fishes (1993) Bull Mar Sci, 53, pp. 393-415; Kirincic, J., Lepetic, V., Recherches sur l{\textquoteright}ichthyobenthos dans les profondeurs de l{\textquoteright}adriatique me?ridionale et possibilite? d{\textquoteright}exploitation au moyen de palangres (1955) Acta Adriat, 7, pp. 3-113; Koumoundouros, G., Divanach, P., Kentouri, M., Ontogeny and allometry plasticity of Dentex dentex (Osteichthyes: Sparidae) in rearing conditions (1999) Mar Biol, 135, pp. 561-572; Koumoundouros, G., Divanach, P., Anezaki, L., Kentouri, M., Temperature-induced ontogenetic plasticity in sea bass (Dicentrarchus labrax) (2001) Mar Biol, 139, pp. 817-830; Labropoulou, M., Machias, A., Effects of habitat selection on the dietary patterns of two triglid species (1998) Mar Ecol Prog Ser, 173, pp. 275-288; Lovett, D.L., Felder, D.L., Application of regression techniques to the studies of relative growth in crustaceans (1989) J Crustac Biol, 9, pp. 529-539; Machias, A., Somarakis, S., Tsimenides, N., Bathymetric distribution and movements of red mullet Mullus surmuletus (1998) Mar Ecol Prog Ser, 166, pp. 247-257; Macpherson, E., Duarte, C.M., Bathymetric trends in demersal fish size: Is there a general relationship? (1991) Mar Ecol Prog Ser, 71, pp. 103-112; Papandroulakis, N., Divanach, P., Kentouri, M., Specific diversification in finfish mariculture: The Mediterranean case (1997) Proceedings of the International Conference in Martinique, pp. 223-224. , Spec Publ Eur Aquacult Soc Book of abstract; Petrakis, G., Stergiou, K.I., Size selectivity of diamond and square mesh codends for four commercial Mediterranean fish species (1997) ICES J Mar Sci, 54, pp. 13-23; Regner, S., Dulcic, J., Growth of sea bass, Dicentrarchus labrax, larval and juvenile stage and their otoliths under quasi-steady temperature conditions (1994) Mar Biol, 119, pp. 169-177; Roberts, C.D., The wreckfish Polyprion americanus (Schneider, 1801) in Irish waters: An underwater sighting and review of the Irish records (1977) Ir Nat J, 19, pp. 108-112; Roberts, C.D., Reproductive mode in the percomorph fish genus Polyprion Oken (1989) J Fish Biol, 34, pp. 1-9; Sagnes, P., Gaudin, P., Statzner, B., Shift in morphometrics and their relation to hydrodynamic potential and habitat use during grayling ontogenesis (1997) J Fish Biol, 50, pp. 846-858; Schaeffer, B., Rosen, D.E., Major adaptive level in the evolution of the actinopterygian feeding mechanism (1979) Reading in Ichthyology, pp. 95-111. , Love MS, Cailliet GM (eds). Goodyear, Calif; Schmidt-Nielsen, K., (1984) Scaling, Why is Animal Size so Important?, , Cambridge University Press, Cambridge; Sedberry, G.R., Ulrich, G.F., Applegate, A.J., Development and status of the fishery for wreckfish (Polyprion americanus) in the southeastern United States (1994) Proc Gulf Caribb Fish Inst, 43, pp. 168-192; Sedberry, G.R., Carlin, J.L., Chapman, R.W., Eleby, B., Population studies in the pan-oceanic wreckfish, Polyprion americanus (Teleostei: Polyprionidae), as indicated by mtDNA variation (1996) J Fish Biol, 49 (SUPPL. A), pp. 318-329; Sedberry, G.R., Carlin, J.L., Menezes, G.M., Movements of a pelagic-phase wreckfish, Polyprion americanus (Schneider, 1801), as indicated by tag and recapture (1998) Arquipel Bull Univ Azores Life Mar Sci A, 16, pp. 69-72; Sedberry, G.R., Andrade, C.A., Carlin, J.L., Chapman, R.W., Luckhurst, B.E., Manooch, C.S., Menezes, G., (...), Ulrich, G.F., Wreckfish Polyprion americanus in the North Atlantic: Fisheries, biology, and management of a widely distributed and long-lived fish (1999) Am Fish Soc Symp, 23, pp. 27-50; Somarakis, S., Machias, A., Age, growth and bathymetric distribution of red pandora (Pagellus erythrinus) on the Cretan shelf (eastern Mediterranean) (2002) J Mar Biol Assoc UK, 82, pp. 149-160; Somarakis, S., Catalano, B., Tsimenides, N., Catchability and retention of larval European anchovy, Engraulis encrasicolus, with bongo nets (1998) Fish Bull (Wash DC), 96, pp. 917-925; Stefanescu, C., Rucabado, J., Lloris, D., Depth-size trends in western Mediterranean demersal deep-sea fishes (1992) Mar Ecol Prog Ser, 81, pp. 205-213; Stergiou, K.I., Economidis, P., Sinis, A., Sex ratio, spawning season and size at maturity of red bandfish in western Aegean Sea (1996) J Fish Biol, 49, pp. 561-572; Suquet, M., Normant, Y., Severe, A., Barone, H., Fostier, A., Le Delliou, H., Fauvel, C., Growth performances of the wreckfish (Polyprion americanus) in captivity (2001) Larvi 2001. Spec Publ Eur Aquacult Soc, 30, pp. 586-589; Tortonese, E., (1975) Fauna d{\textquoteright}Italia. Osteichthyes, 11. , Calderini, Bologna; Tuck, I.D., Atkinson, R.J.A., Chapman, C.I., Population biology of the Norway lobster, Nephrops norvegicus (L.) in the Firth of Clyde, Scotland. II. Fecundity and size at onset of sexual maturity (2000) ICES J Mar Sci, 57, pp. 1227-1239; Warburton, K., Blaber, S.J.M., Pattern of recruitment and recourse use in a shallow-water fish assemblages in Moreton Bay, Queensland (1992) Mar Ecol Prog Ser, 90, pp. 113-126; Webb, P.W., Locomotor pattern in the evolution of actinopterygian fishes (1982) Am Zool, 22, pp. 329-342.}, month = {2003///}, pages = {45-52}, abstract = {The wreckfish (Polyprion americanus) is a panoceanic, long-lived, deep-water demersal species, characterized by an extended pelagic juvenile phase associated with floating objects. In the present study morphometric data from 435 specimens collected from Greece (Crete), Italy (Ionian Sea) and the Atlantic coast of France from September 1999 to March 2001 were analyzed to estimate the settlement size of the species and associated changes in morphology. The fishery sample included specimens from both the pelagic and the demersal stage. Length-at-settlement (TL50) and 95\% confidence intervals were estimated by fitting a logistic function. Eleven morphometric characters were analyzed, and the existing inflection points, reflecting alterations in body shape, were defined: (1) iteratively, as the transition point, splitting the data set into two groups, for which the reduced major axis functions, between a character and total length, of the successive groups best fit (minimum sum of squares of residuals) the combined data set and (2) where the second derivative of the fitted third-order polynomial functions to morphometric ratios equaled zero. The main size range within which wreckfish settled was 56-65 cm, and the means of the inflection points defined by the two methods were 61 and 64 cm. These results indicate changes in functional morphology associated with settlement. The monitoring of wreckfish juveniles caught in the wild and kept individually in captivity showed changes in growth and food intake at approximately the estimated settlement length and suggested that temperature was the most likely factor triggering settlement.}, keywords = {Pisces}, author = {Machias, A. and Somarakis, S. and Papadroulakis, N. and Spedicato, M.-T. and Suquet, M. and Lembo, G. and Divanach, P.} } @article {8968, title = {Bathymetric distribution and movements of red mullet Mullus surmuletus.}, journal = {Marine Ecology Progress SeriesMarine Ecology Progress Series}, volume = {166}, year = {1998}, pages = {247-257}, author = {Machias, A. and Somarakis, S. and Tsimenides, N.} } @article {7725, title = {Site-attachment behaviour of Oblada melanura (Linnaeus, 1758) (Osteichthyes: Sparidae) benthic larvae: a quantitative approach}, journal = {Scientia MarinaScientia MarinaScientia Marina}, volume = {72}, number = {3}, year = {2008}, note = {ISI Document Delivery No.: 360NDTimes Cited: 0Cited Reference Count: 33}, month = {Sep}, pages = {429-436}, type = {Article}, abstract = {The site-attachment behaviour of O. melanura settlers was examined in an estuarine area of western Greece. The approach that was followed included underwater assignments of shoal identities and continuous recording of specific behavioural traits. Variations between ontogenetic stages with respect to the pattern of residence at the sites were quantified via an index (the residence-persistence index (RPI)) devised for this purpose. Our findings suggest that this species initiates settlement in small shoals that occupy specific sites at the substratum where they reside for various days. This behavioural trait is stage-specific and gradually diminishes as the fish complete metamorphosis, while at the same time they change their social organisation. Such an ontogeny-dependent site-attachment behaviour has not been described before and is markedly different from that described for other members of the Sparidae family.}, keywords = {CORAL-REEF FISHES, FIDELITY, juvenile, movement, Oblada melanura, ontogenetic shift, patterns, recruitment, Settlement, site-attachment, SNAPPER LUTJANUS-CAMPECHANUS, Sparidae, STAGE LARVAE, TEMPERATE}, isbn = {0214-8358}, author = {Kiparissis, S. and Tserpes, G. and Somarakis, S. and Economidis, P. S. and Koutsikopoulos, C.} } @article {6896, title = {Interranual variability in horizontal patterns of larval fish assemblages in the northeastern Aegean Sea (eastern Mediterranean) during early summer}, journal = {Estuarine, Coastal and Shelf ScienceEstuarine, Coastal and Shelf ScienceEstuarine, Coastal and Shelf Science}, volume = {79}, number = {4}, year = {2008}, note = {ISI Document Delivery No.: 358XSTimes Cited: 9Cited Reference Count: 53}, month = {Sep}, pages = {607-619}, type = {Article}, abstract = {Larval fish community structure was studied in the northeastern Aegean Sea (NEA) over an area influenced by the advection of Black Sea water (BSW). Sampling was carried out in early summer during a period of 4 years (2003-2006). Taxonomic composition and abundance presented high variability in space that remained relatively constant among years. Tow depth and indicators of trophic conditions in the upper water column (i.e., zooplankton displacement volume, fluorescence) explained significantly the structure of larval assemblages during all surveys. The northern continental shelf (Thracian and Strymonikos shelo, where a large amount of enriched, low salinity BSW is retained, was dominated by larvae of epipelagic species, mainly anchovy (Engraulis encrasicolus). Interannual changes in horizontal extension of the BSW seemed to match closely observed changes in the distribution of anchovy larvae. Mesopelagic fish larvae were particularly abundant beyond the continental shelf (over the North Aegean Trough) where a strong frontal structure is created between the low salinity waters of BSW origin and the high salinity waters of the Aegean Sea. Larvae of certain mesopelagic species (e.g., Ceratoscopelus maderensis) may occasionally be transported inshore when the prevailing current meanders towards the coast or feeds anticyclonic gyres over the continental shelf. (C) 2008 Elsevier Ltd. All rights reserved.}, keywords = {advection, ANCHOVY ENGRAULIS-ENCRASICOLUS, community, composition, continental shelves, DAILY EGG-PRODUCTION, DISTRIBUTION PATTERNS, eastern Mediterranean, EUROPEAN ANCHOVY, fish larvae, Greece, habitat, HETEROGENEITY, horizontal distribution, ichthyoplankton, MESOSCALE, northeastern Aegean Sea, populations, sardinella-aurita, VERTICAL-DISTRIBUTION}, isbn = {0272-7714}, author = {Isari, S. and Fragopoulu, N. and Somarakis, S.} } @proceedings {6897, title = {Mesozooplankton community structure in the northeastern Aegean sea, in relation to Black sea water circulation}, year = {2006}, month = {26-30.6.2006}, pages = {46}, publisher = {Hellenic Zoological Society}, address = {Patra}, keywords = {KAPE Marine}, author = {Isari, S. and Ramfos, A. and Somarakis, S. and Koutsikopoulos, C. and Frangopoulou, N.} } @article {6898, title = {Mesozooplankton distribution in relation to hydrology of the Northeastern Aegean Sea, Eastern Mediterranean}, journal = {Journal of Plankton ResearchJournal of Plankton Research}, volume = {28}, number = {3}, year = {2006}, pages = {241}, keywords = {marine}, author = {Isari, S. and Ramfos, A. and Somarakis, S. and Koutsikopoulos, C. and Kallianiotis, A. and Fragopoulu, N.} } @conference {2157, title = {Distribution of Anchovy and Sardine in N. Aegean Sea in June 1995}, booktitle = {ΕΛΛΗΝΙΚΗ ΕΤΑΙΡΕΙΑ ΒΙΟΛΟΓΙΚΩΝ ΕΠΙΣΤΗΜΩΝ - 18{\textdegree} ΠΑΝΕΛΛΗΝΙΟ ΣΥΝΕΔPΙΟ}, year = {1996}, month = {17-19 ΑΠΡΙΛΙΟΥ}, publisher = {ΕΛΛΗΝΙΚΗ ΕΤΑΙΡΕΙΑ ΒΙΟΛΟΓΙΚΩΝ ΕΠΙΣΤΗΜΩΝ}, organization = {ΕΛΛΗΝΙΚΗ ΕΤΑΙΡΕΙΑ ΒΙΟΛΟΓΙΚΩΝ ΕΠΙΣΤΗΜΩΝ}, address = {ΚΑΛΑΜΑΤΑ}, keywords = {Aegean, anchovy, distribution, marine, sardine, Αιγαίο, γαύρος, διανομή, θαλάσσιο ψάρι, σαρδέλα, ψάρια}, author = {Machias, A. and Somarakis, S. and Kapandagakis, A. and Tsimenides, N} } @conference {2000, title = {Spatial Modelling of the European Anchovy Habitat in the Eastern Mediterranean Basin Using GAMS and GIS Technology}, booktitle = {10th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions}, year = {2006}, month = {26-30 June}, publisher = {Hellenic Zoological Society, Hellenic Ornithological Society, Hellenic Ministry of Rural Development, Section of Animal Biology (Dept. Of Biology, Univ. of Patras)}, organization = {Hellenic Zoological Society, Hellenic Ornithological Society, Hellenic Ministry of Rural Development, Section of Animal Biology (Dept. Of Biology, Univ. of Patras)}, address = {Patras}, keywords = {anchovy, GAMs, GIS, habitat, model, modelling, spatial, γαύρος, ενδιαίτημα, μοντέλο, μοντελοποίηση, χωρικός}, author = {Giannoulaki, M. and Machias, A. and Valavanis, V. and Somarakis, S. and Papaconstantinou, C.} }