Data/hora: 10/06/2024 09:10:37

Provedor de dados: | 5
País: | France
Título: | Seasonal changes in carbohydrate metabolism and its relationship with summer mortality of Pacific oyster Crassostrea gigas (Thunberg) in Marennes-Ole'ron bay (France)
Autores: | Soletchnik, Patrick; Faury, Nicole; Goulletquer, Philippe.
Data: | 2006-03
Ano: | 2006
Palavras-chave: | Marennes Oleron bay; Glycogenolysis; In vivo; Glycogen incorporation; Maturation; Summer mortality; Crassostrea gigas.
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.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/2006/publication-1116.pdf

DOI:10.1016/j.aquaculture.2005.07.008

Editor: | Elsevier
Relação: | http://archimer.ifremer.fr/doc/00000/1116/
Formato: | application/pdf
Fonte: | Aquaculture (0044-8486) (Elsevier), 2006-03 , Vol. 252 , N. 2-4 , P. 328-338
Fonte: | 2005 Elsevier B.V. All rights reserved