%0 Journal Article
%T Nuclear abnormalities in erythrocytes and morphometric indexes in the catfish Cathorops spixii (Ariidae) from different sites on the southeastern Brazilian coast
%A Juliana de Souza Azevedo
%A Elisabete de Santis Braga
%A Ciro Alberto Oliveira Ribeiro
%J Brazilian Journal of Oceanography
%D 2012
%I Universidade de S?o Paulo
%R 10.1590/s1679-87592012000300005
%X Nuclear abnormalities in erythrocytes (NAE) were taken as biomarkers in the catfish Cathorops spixii (Ariidae) sampled in an estuary little affected by human activity (Canan谷ia) and in three regions (Santos Channel: SC, Santos Bay: SB and S o Vicente Channel: SVC) of the Santos-S o 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 Canan谷ia 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 Canan谷ia 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. Altera  es nucleares eritrocit芍rias (ANE) foram consideradas como biomarcadores nos bagres Cathorops spixii (Ariidae) amostrados em um estu芍rio com baixa influ那ncia humana (Canan谷ia) e em tr那s regi es (Canal de Santos: CS, Ba赤a de Santos: BS e Canal de S o Vicente: CSV) no estu芍rio de Santos-S o Vicente, impactado por diversas atividades antropog那nicas. Aumentos nas ANE foram observados nos peixes amostrados no CS e CSV durante o per赤odo de ver o, quando comparados com os esp谷cimes do estu芍rio de Canan谷ia. Estes resultados sugerem a presen a de compostos genot車xicos nessas regi es. Entretanto, aus那ncia de diferen as significativas na freq邦那ncia de micron迆cleos refletem baixos efeitos mutag那nicos nesses indiv赤duos. As menores freq邦那ncias de ANE nos esp谷cimes amostrados na BS podem estar associado 角 maior remobiliza  o e dilui  o dos compostos qu赤micos na regi o. A baixa freq邦那ncia de ANE em C. spixii do estu芍rio de Canan谷ia corrobora a menor influ那ncia antropog那nica nesse sistema, e pode estar sugerindo aus那ncia de efeitos genot車xicos e mutag那nicos nos organismos.
%K altera  es nucleares
%K genotoxicidade
%K biomonitoramento
%K estu芍rios
%K bagres
%K Cathorops spixii
%K nuclear abnormalities
%K genotoxicy
%K biomonitoring
%K estuaries
%K catfish
%K Cathorops spixii
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592012000300005