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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.12 no.3 Curitiba Sept. 1995

http://dx.doi.org/10.1590/S0101-81751995000300022 

Contaminação por mercúrio em sedimento e em moluscos do Pantanal, Mato Grosso, Brasil

 

Mercury contamination in sediment and in molluscs of Pantanal, Mato Grosso, Brazil

 

 

Luiz M. VieiraI; Cleber J.R. AlhoII; Geraldo A.L. FerreiraIII

ICentro de Pesquisa Agropecuária do Pantanal, Empresa Brasileira de Pesquisa Agropecuária, Caixa Postal 109, 79320-970 Corumbá, Mato Grosso do Sul, Brasil
IIFundo Mundial para a Natureza (WWF-Brasil). SHIS EQQL 6/8 Conjunto E 2º andar, 71620-430 Brasília, Distrito Federal, Brasil
IIIDepartamento de Química, Universidade de Brasília, Caixa Postal 0463, 70910-970 Brasília, Distrito Federal, Brasil

 

 


ABSTRACT

The total level of mercury detected in the sediment and in the tissues of molluscs from the Bento Gomes basin, although low, have shown that the mercury used in the gold mining activities in the Poconé wetlands has contaminated those aquatic habitats in Pantanal. From 69 sediment samples analyzed, 26 % (N = 18) have shown levels ranging from 0.01 to 0.25µg.g-1 of mercury (moist weight). Mercury levels analyzed in 54 samples of mollusc tissues (Ampullaria scalaris Orbigny, 1835; A. canaliculata Lamarck, 1819 and Marisa planogyra Pilsbry, 1933) have shown that 30% (N = 16) were contaminated with levels ranging from 0.02 to 1.16µg.g-1 moist weight. This study shows that the mercury used in digs for gold mining and released into the environment has reached the habitats of Pantanal spread from the sediment into the molluscs living in the region.

Key words: Molluscs, biomagnification, contaminants, mercury, sediment


 

 

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Full text available only in PDF format.

 

 

AGRADECIMENTOS. Às diretorias do Centro de Pesquisa Agropecuária dos Cerrados (CPAC), da Empresa Brasileira de Pesquisa Agropecuária, do Fundo Mundial para a Natureza (WWF-Brasil), do Centro Nacional de Recursos Genéticos e Biotecnologia (CENARGEN) e Universidade de Brasília (UnB), pelas facilidades técnico-científicas e apoio. A Prefeitura Municipal de Poconé (Mato Grosso), pelo apoio logístico.

 

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Recebido em 16.VIII.1994; aceito em 20.XI.1995.

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