Data/hora: 03/06/2024 04:37:08

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
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