Data/hora: 02/06/2024 06:56:16

Provedor de dados: | 5
País: | France
Título: | Trace element levels in foetus-mother pairs of short-beaked common dolphins (Delphinus delphis) stranded along the French coasts
Autores: | Lahaye, V; Bustamante, Paco; Dabin, W; Churlaud, C; Caurant, Florence.
Data: | 2007-11
Ano: | 2007
Palavras-chave: | North eastern Atlantic; Pregnancy; Selenium; Mercury; Marine mammals.
Resumo: | Tissues of foetus-mother pairs of common dolphins (Delphinus delphis) stranded along the French coasts (Bay of Biscay and English Channel) were analysed for their Cd, Cu, Hg, Se and Zn contents. In the kidneys, foetal Cd levels were extremely low, and strong relationships between Cu and Zn suggested the involvement of metallothioneins since early foetal life. The results also indicated a limited maternal transfer of Hg during pregnancy since levels in the tissues of foetuses were below 1 mu g g(-1) w.wt. However, hepatic Hg levels in foetuses increased with body length, and were also proportionate to maternal hepatic, renal and muscular Hg levels. Lastly, affinities between Hg and Se in tissues would participate in Hg neutralisation in both mothers-through tiemannite granules- and fetuses-through reduced glutathione-counteracting the toxic effects linked to the particularly high quantities of methyl-Hg to which marine mammals are naturally exposed. (C) 2007 Elsevier Ltd. All rights reserved.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/2007/publication-3691.pdf

DOI:10.1016/j.envint.2007.05.008

Editor: | Elsevier
Relação: | http://archimer.ifremer.fr/doc/00000/3691/
Formato: | application/pdf
Fonte: | Environment International (0160-4120) (Elsevier), 2007-11 , Vol. 33 , N. 8 , P. 1021-1028
Fonte: | 2007 Elsevier Ltd All rights reserved.