| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Seasonal changes in carbohydrate metabolism and its relationship with summer mortality of Pacific oyster Crassostrea gigas (Thunberg) in Marennes-Ole'ron bay (France)
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| Autores: |
Soletchnik, Patrick
Faury, Nicole
Goulletquer, Philippe
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| Data: |
2006-03
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| Ano: |
2006
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| Palavras-chave: |
Marennes Oleron bay
Glycogenolysis
In vivo
Glycogen incorporation
Maturation
Summer mortality
Crassostrea gigas
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| Resumo: |
This paper investigates the biological responses of Crassostrea gigas under traditional culture conditions on a mudflat in Marennes-Oleron bay. Summer mortality has been regularly observed in recent years in oysters reared using "on bottom" culture conditions. The present study attempts to provide a better understanding of the mortality phenomenon through biological parameters. Classical 'field parameters' such as mortality and growth rates, and quality index (dry meat weight/ dry shell weight x 1000) were monitored. Additional parameters, as biochemical composition of oyster meat and glucose incorporation capacity, were included as potential new bioindicators. The work highlighted a critical timing (May-June) preceding the summer mortality and characterised by an arrest in lipid synthesis and a decrease in carbohydrate content. During this period, growth (especially gonad maturation) either slowed down significantly or even stopped. The first mortality event occurred during a growth renewal period at the end of June. Short-term analysis (15 days) provided information to identify such responses which may indicate a physiological stress and demonstrating the need for further investigation. The seasonal food availability (estimated from chlorophyll a levels) did not facilitate the mortality understanding which occurred after water temperature went above 18-19 T. Nevertheless, this study shows carbohydrate anabolism contributed in the physiological stress leading to mortality events.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/2006/publication-1116.pdf
DOI:10.1016/j.aquaculture.2005.07.008
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| Editor: |
Elsevier
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| Relação: |
http://archimer.ifremer.fr/doc/00000/1116/
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| Formato: |
application/pdf
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| Fonte: |
Aquaculture (0044-8486) (Elsevier), 2006-03 , Vol. 252 , N. 2-4 , P. 328-338
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| Direitos: |
2005 Elsevier B.V. All rights reserved
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