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Caractérisation et variation phénotypique et biologique des deux sexes du sandre "Sander lucioperca" (l., 1758) (teleosteen, percidae) dans la retenue de barrage de Nebhana (Tunisie Centrale). OceanDocs
Turki, O.; M'Hetli, M.; Chriki, A.; Kraiem, M.M..
Dans le but de caractériser phénotypiquement et biologiquement la population de sandre (Sander lucioperca (L, 1758)), et de détecter une éventuelle variabilité entre les sexes, une étude des variables méristiques et morphométriques ainsi que la croissance, a concerné 133 mâles et 166 femelles issus de la retenue de barrage de Nebhana. Le choix des variables méristiques et morphométriques a été décelé à partir de travaux bibliographiques montrant un taux important de variabilité chez les poissons marins et d'eau douce. Ainsi 9 caractères méristiques et 23 variables morphométriques ont été retenus. Les résultats ont montré une invariance des caractères méristiques entre les mâles et les femelles. Quant aux rapports morphométriques, les mâles diffèrent des...
Tipo: Journal Contribution Palavras-chave: Animal morphology; Biological data; Cell differentiation; Comparative studies; Freshwater fish; Growth; Meristic counts; Morphometry; Phenotypes; Phenotypic variations; Population structure; Water reservoirs; Sex; Sex characters; Marine fisheries; Pike perch.
Ano: 2009 URL: http://hdl.handle.net/1834/4748
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Supply and larval traits at metamorphosis of a coastal marine invertebrate with a bi-phasic life cycle under contrasting oceanographic conditions ArchiMer
Rey, Felisa; Silva Neto, Gina M.; Bueno-pardo, Juan; Bispo, Regina; Calado, Ricardo.
Patterns of larval supply and larval condition at metamorphosis play key roles in the structure and dynamics of marine populations. Hence, biological and environmental conditions driving the dispersion of larval individuals, shape early life phenotypes, and influence their survival and post-settlement success. We performed a study over two consecutive years at Ria de Aveiro (Portugal), a coastal lagoon influenced by upwelling regimens in the North-eastern Atlantic. This study assessed the effect of contrasting oceanographic conditions on larval supply and larval traits at metamorphosis of the green crab Carcinus maenas. Crab megalopae were daily sampled and monitored in the laboratory until metamorphosis. Environmental conditions experienced by larvae in...
Tipo: Text Palavras-chave: Carcinus maenas; Bi-phasic life cycles; Invertebrate larvae; Phenotypic variations; Time series; Upwelling; East Atlantic; Portugal; Ria de Aveiro.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00514/62599/66957.pdf
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