Data/hora: 10/06/2024 12:13:53

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