Data/hora: 01/06/2024 03:40:21

Provedor de dados: | 5
País: | France
Título: | Effects of dissolved mercury on embryogenesis, survival, growth and metamorphosis of Crassostrea gigas oyster larvae
Autores: | Beiras, Ricardo; His, Edouard.
Data: | 1994
Ano: | 1994
Palavras-chave: | Mercury; Oyster; Larvae; Embryo; Bioassay; Ecotoxicology; Crassostrea gigas.
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.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00037/14867/12191.pdf
Editor: | Inter-Research
Relação: | http://archimer.ifremer.fr/doc/00037/14867/
Formato: | application/pdf
Fonte: | Marine Ecology Progress Series (0171-8630) (Inter-Research), 1994 , Vol. 113 , P. 95-103
Fonte: | 1994 Inter-Research