%0 Journal Article
%T Accumulation and distribution of metals in the tissues of two catfish species from Canan¨¦ia and Santos-S o Vicente estuaries
%A Juliana de Souza Azevedo
%A Marcos Ant£¿nio Hortellani
%A Jorge Eduardo de Souza Sarkis
%J Brazilian Journal of Oceanography
%D 2012
%I Universidade de S?o Paulo
%X Pb, Cd, Zn, and Cu concentrations and their distribution in liver, gill, and muscle tissues of the catfish Cathorops spixii and Genidens genidens were investigated in order to provide information concerning the bioaccumulation processes in these species. Fish were collected in one estuary subject to slight human influence (Canan¨¦ia) and in two regions within the Santos-S o Vicente estuary, S o Paulo, Brazil, subject to distinct anthropogenic influences: 1) industrial and 2) domestic. In general, the highest concentrations of Cu, Zn, Cd, and Pb were found in the liver tissue. Muscle showed the lowest values of metal accumulation for all the elements investigated. Regarding the distribution and the metal pollution index (MPI), the levels of the metals analyzed decreased in the following order: liver>gill>muscle. MPI results suggest that gill and liver are important organs to exemplify the bioaccumulation process and are also better able to reflect both recent and chronic exposure to metals. Concentra  es de Pb, Cd, Zn e Cu e sua distribui  o no f¨ªgado, branquias e m¨²sculo dos bagres Cathorops spixii e Genidens genidens foram determinadas visando fornecer informa  es sobre os processos de bioacumula  o desses metais nas esp¨¦cies. Os peixes foram coletados no estu¨¢rio de Canan¨¦ia e em duas regi es do estu¨¢rio de Santos-S o Vicente, ambos em S o Paulo, Brasil. Esses estu¨¢rios apresentam distintas influ¨ºncias antropog¨ºnicas, sendo o primeiro deles submetido a impacto industrial e o segundo a impacto dom¨¦stico. Em geral, as maiores concentra  es de Cu, Zn, Cd e Pb foram obtidas no tecido hep¨¢tico. No m¨²sculo foram encontrados os menores valores de acumula  o para todos os elementos investigados. Quanto ¨¤ distribui  o dos metais e ao seu ¨ªndice de polui  o (¨ªndice de Polui  o por Metais-IPM), os n¨ªveis diminu¨ªram na seguinte ordem: f¨ªgado>branquias>m¨²sculo. Resultados do IPM sugerem que as branquias e o f¨ªgado s o importantes ¨®rg os para indicar processos de bioacumula  o, sendo tamb¨¦m os melhores para refletir exposi  es cr nica e recente a metais.
%K Bioacumula  o
%K Metais essenciais e n o essenciais
%K ¨ªndice de polui  o por metais
%K Estu¨¢rios
%K Cathorops spixii
%K Genidens genidens
%K Bioaccumulation
%K essential and non-essential metals
%K Metal pollution index
%K Estuaries
%K Cathorops spixii
%K Genidens genidens
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592012000400005