| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Individual growth variation and its relationship with survival in juvenile Pacific oysters, Crassostrea gigas (Thunberg)
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| Autores: |
Boudry, Pierre
Collet, B
Mccombie, Helen
Ernande, Bruno
Morand, B
Heurtebise, Serge
Gerard, Andre
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| Data: |
2003-09
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| Ano: |
2003
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| Palavras-chave: |
Survival
Oysters
Growth
Crassostrea gigas
Aquaculture
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| Resumo: |
In order to study individual growth variability and its relationship with survival in juvenile Crassostrea gigas, parental oysters were sampled at four sites located along the French Atlantic coast and bred under controlled hatchery conditions. Four groups of larvae were obtained by crossing five males and five females from each of the four sites, and a fifth group by crossing these 20 males and 20 females together in a pool. Larvae were reared under conditions allowing the maintenance of a maximum variability of size and gave five experimental groups. Oysters were individually monitored for growth and survival from 3 to 10 months after fertilization. The individual growth performances were relatively stable over time and no noticeable compensation for growth occurred. Early growth rate was a very good predictor of size later in life: 66% of variation in the live weight at 10 months could be explained by variation in the initial growth rate calculated between 3 and 4 months. A significant group effect was observed on survival and on growth rate. Mortality mostly occurred between 3 and 5 months and appeared to affect the slow-growing animals more. However, two groups can be distinguished among those which died during the experimental period, one which showed a decrease in weight and the other whose growth was similar to surviving oysters. These results are discussed in the light of usual oyster farming practices and selective breeding.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/2003/publication-467.pdf
DOI:10.1023/B:AQUI.0000004189.49517.c0
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| Editor: |
Kluwer
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| Relação: |
http://archimer.ifremer.fr/doc/00000/467/
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| Formato: |
application/pdf
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| Fonte: |
Aquaculture International (0967-6120) (Kluwer), 2003-09 , Vol. 11 , N. 5 , P. 429-448
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| Direitos: |
2003 Springer
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