| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Effects of dissolved mercury on embryogenesis, survival, growth and metamorphosis of Crassostrea gigas oyster larvae
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| Autores: |
Beiras, Ricardo
His, Edouard
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| Data: |
1994
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| Ano: |
1994
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| Palavras-chave: |
Mercury
Oyster
Larvae
Embryo
Bioassay
Ecotoxicology
Crassostrea gigas
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| Resumo: |
The effects of mercury (Hg) concentrations ranging from 0 (control) to 1024 µg 1-1 upon embryogenesis, survival, growth and metamorphosis of Crassostrea gigas (Thunberg) oyster larvae were investigated. Embryogenesis was abnormal in 50 % of the individuals at 11 µg 1-1 . The 48 h LD50 for D·shaped, umbonate and pediveliger larvae were 33, 115 and 200 µg 1-1 respectively. The increase in LD50 was partially explained by the larval weight increase, although weight-specific tolerance to Hg was higher in smaller larvae. Growth, the most sensitive physiological process studied, was significantly retarded at 4 µg 1-1. The metamorphosis rate was significantly reduced when competent pediveligers were exposed to 64 µg 1-1 for 48 h prior to the addition of the metamorphosis inducer epinephrine. The implications of the present results for monitoring pollution by utilising different bivalve larval stages are discussed.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00037/14867/12191.pdf
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| Editor: |
Inter-Research
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| Relação: |
http://archimer.ifremer.fr/doc/00037/14867/
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| Formato: |
application/pdf
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| Fonte: |
Marine Ecology Progress Series (0171-8630) (Inter-Research), 1994 , Vol. 113 , P. 95-103
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| Direitos: |
1994 Inter-Research
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