Data/hora: 01/06/2024 10:22:48

Provedor de dados: | 5
País: | France
Título: | Performance of triploid Pacific oysters Crassostrea gigas (Thunberg) reared in high carrying capacity ecosystem : survival, growth and proximate biochemical composition
Autores: | Goulletquer, Philippe; Joly, Jean-pierre; Gerard, Andre; Le Gagneur, Eric; Moriceau, Jacques; Peignon, Jean-marie; Heurtebise, Serge; Phelipot, Pascal.
Data: | 1996
Ano: | 1996
Palavras-chave: | Biochemical compostion; Survival; Carrying capacity; Triploid; Growth; Oysters; Crassostrea gigas; Composition biochimique; Survie; Capacité trophque; Triploïdes; Croissance; Huîtres; Crassostrea gigas.
Resumo: | Triploid oysters Crassllstrea gigas were: produced in 1990 by treating fertilized eggs with cytochalasin B (CS). Triploids, treated diploids, and controls were deployed early 1991 in a high carrying capacity ecosystem on the Eastern Coast of Normandy (France). A monthly monitoring in 1992 showed that triploids yielded significantly higher growth rate and biochemical composition. However, growth was more heterogeneous. No evidence was found for a length or weight bimodal frequency distribution within triploid groups after a 26 months rearing cycle. Triploids showed retardation of gametogenesis. Carbohydrates content in triploids remained almost constant (40%) from June to September. Their survival rates were significantly lower than controls. Moreover treated diploids were found more sensitive to environmental conditions than controls, demonstrating long term CS effect on oysters. Therefore, the method of induction should be improved to maximize triploidy and long term survival rates. We recommend further field testings to assess triploid response to stressfuI environmental conditions, particularly 10 low carrying capacity ecosystems.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1996/publication-3088.pdf
Editor: | Société Française de Malacololgie
Relação: | http://archimer.ifremer.fr/doc/00000/3088/
Formato: | application/pdf
Fonte: | Haliotis (Société Française de Malacololgie), 1996 , Vol. 25 , P. 1-12