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Sociedade Brasileira de Genética, Genetics and Molecular Biology, 4(34), p. 694-697, 2011

DOI: 10.1590/s1415-47572011000400024

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Studies of micronuclei and other nuclear abnormalities in red blood cells of Colossoma macropomum exposed to methylmercury

Journal article published in 2011 by Carlos Alberto Machado da Rocha, Lorena Araújo da Cunha, Raul Henrique da Silva Pinheiro, Pinheiro,Raul Henrique da Silva, Bahia,Marcelo de Oliveira, Rommel Mario Rodr?Guez Burbano, Burbano,Rommel Mario Rodríguez, Marcelo de Oliveira Bahia, Carlos Alberto Machado da Rocha, Lorena Araújo da Cunha, Raul Henrique da Silva Pinheiro, Rocha,Carlos Alberto Machado Da, Marcelo de Oliveira Bahia, Cunha,Lorena Araújo Da ORCID, Rommel Mario Rodríguez Burbano
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The frequencies of micronuclei (MN) and morphological nuclear abnormalities (NA) in erythrocytes in the peripheral blood of tambaqui (Colossoma macropomum), treated with 2 mg.L(-1) methylmercury (MeHg), were analyzed. Two groups (nine specimens in each) were exposed to MeHg for different periods (group A - 24 h; group B - 120 h). A third group served as negative control (group C, untreated; n = 9). Although, when compared to the control group there were no significant differences in MN frequency in the treated groups, for NA, the differences between the frequencies of group B (treated for 120 h) and the control group were extremely significant (p < 0.02), thus demonstrating the potentially adverse effects of MeHg on C. macropomum erythrocytes after prolonged exposure.