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Using a spatially structured life cycle model to assess the influence of multiple stressors on an exploited coastal-nursery-dependent population ArchiMer
Archambault, B.; Rivot, E.; Savina-rolland, Marie; Le Pape, Olivier.
Exploited coastal-nursery-dependent fish species are subject to various stressors occurring at specific stages of the life cycle: climate-driven variability in hydrography determines the success of the first eggs/larvae stages; coastal nursery habitat suitability controls juvenile growth and survival; and fisheries target mostly adults. A life cycle approach was used to quantify the relative influence of these stressors on the Eastern English Channel (EEC) population of the common sole (Solea solea), a coastal-nursery-dependent flatfish population which sustains important fisheries. The common sole has a complex life cycle: after eggs hatch, larvae spend several weeks drifting in open water. Survivors go on to metamorphose into benthic fish. Juveniles...
Tipo: Text Palavras-chave: Life cycle model; Spatial processes; Metapopulation; Coastal nursery habitat degradation; Fishing; Solea; Multiple stressors; Scenarios.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00301/41213/40367.pdf
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Etude preliminaire des equilibres de distribution de l'eau et des ions au cours de l'ovogenese de Solea solea ArchiMer
Gallis, J; Lemenn, F; Lebrun, A; Nunez, R.
During oogenesis of Solea solea L., gonadal changes in water, Na super(+) and K super(+) ions seem to be related to yolk protein incorporation by the oocyte. The decrease in oocyte water accumulation, associated with an increase in pericellular water accumluation and a decrease in K super(+) concentration occurs when vitellogenin enters the oocyte. Na super(+) concentration decreases in the oocyte at the end of the exogenous vitellogenesis when the first stages of the oocyte maturation take place. Water accumulation in the pericellular space during vitellogenesis allows the rapid transfer of water from this compartment into the oocyte during the terminal phase of maturation. However the total amount of gonadal water remains stable.
Tipo: Text Palavras-chave: Solea solea; Soleidae; Pisces; Hydration; Water content; Ion accumulation; Sexual maturity; Ovaries; Oogenesis; Solea; Maturation ovocytaire; Ovogenèse; Eau; Ions.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1231.pdf
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