Nuclear abnormalities in erythrocytes and morphometric indexes in the catfish Cathorops spixii (Ariidae) from different sites on the southeastern Brazilian coast

  • Juliana de Souza Azevedo Instituto de Pesquisas Energéticas e Nucleares; Centro de Química e Meio Ambiente
  • Elisabete de Santis Braga Universidade de São Paulo; Instituto Oceanográfico
  • Ciro Alberto Oliveira Ribeiro Universidade de São Paulo; Instituto Oceanográfico
Keywords: nuclear abnormalities, genotoxicy, biomonitoring, estuaries, catfish, Cathorops spixii

Abstract

Nuclear abnormalities in erythrocytes (NAE) were taken as biomarkers in the catfish Cathorops spixii (Ariidae) sampled in an estuary little affected by human activity (Cananéia) and in three regions (Santos Channel: SC, Santos Bay: SB and São Vicente Channel: SVC) of the Santos-São Vicente estuary impacted by various anthropogenic activities. Increases in NAE were observed in fish from SC and SVC sampled in the summer period as compared with specimens from the Cananéia estuary. These results suggest the presence of genotoxic compounds in these regions. However, the absence of significant differences in micronuclei frequency reflects slight mutagenic effects in these individuals. It is possible that the lower NAE frequency in specimens from SB might be associated with the greater remobilization and dilution of chemicals in this region. The low frequency of NAE in C. spixii from the Cananéia estuary is in accordance with the slight anthropogenic influence in this system, and may be suggestive of the absence of genotoxic and mutagenic effects in these organisms.

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Published
2012-01-01
How to Cite
Azevedo, J., Braga, E., & Ribeiro, C. (2012). Nuclear abnormalities in erythrocytes and morphometric indexes in the catfish Cathorops spixii (Ariidae) from different sites on the southeastern Brazilian coast. Brazilian Journal of Oceanography, 60(3), 323-330. https://doi.org/10.1590/S1679-87592012000300005
Section
naodefinida