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Provedor de dados:  ArchiMer
País:  France
Título:  Genetic and reproduction strategy in Crassostrea gigas mortality
Autores:  Moal, Jeanne
Bedier, Edouard
Fleury, Pierre-gildas
Langlade, Aime
Le Coguic, Yvette
Degremont, Lionel
Boudry, Pierre
Le Coz, Jean-rene
Pouvreau, Stephane
Enriquez-diaz, M.
Lambert, Christophe
Quere, Christele
Soudant, Philippe
Samain, Jean-francois
Data:  2003-04-13
Ano:  2003
Palavras-chave:  Summer
Oyster culture
Genetic diversity
Commercial species
Resumo:  Bi-parental families were produced in hatchery and tested in the field in 2001. Two sets of 5 families were constituted, selected on their high (R) and low (S) survival. These two sets were reared in Brittany from March to November 2002. Samplings were performed twice a month to obtain data on biometry, survival, reproductive cycle, biochemical composition, adenylate energy charge, hemolymph parameters (ions and defense system) and muscle strength. "R" and "S" oysters exhibited different reproductive effort and spawning strategy. "R" oysters allocated less energy in gonad than "S" ones and presented a complete spawning at the end of August contrary to the "S" which spawns partially. Mortality started in July when the seawater temperature reached 19 degree C and affected mainly "S" oysters. Concentrations of Na and Cl ions in hemolymph were different for "S" and "R" from May to June. A bacterial increase in hemolymph (R and S) was observed during the same period. The adenylate energy charge was more lowered for "R" than for "S" oysters, just before the spawning event However, other physiological and immunological parameters were similar between the two sets during the phases of maturation and mortality but discriminated groups after the spawning peak.
Tipo:  Text
Idioma:  Inglês
Editor:  95. Annual Meeting of the National Shellfisheries Association, New Orleans, LA (USA), 13-17 Apr 2003
Formato:  application/pdf

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