Journal
BRAZILIAN JOURNAL OF OCEANOGRAPHY
Volume 60, Issue 4, Pages 463-472Publisher
INST OCEANOGRAFICO, UNIV SAO PAULO
DOI: 10.1590/s1679-87592012000400005
Keywords
Bioaccumulation; essential and non-essential metals; Metal pollution index; Estuaries; Cathorops spixii; Genidens genidens
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Funding
- Sao Paulo Foundation for Research Support-FAPESP [2008/58261-6]
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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 (Cananeia) and in two regions within the Santos-Sao Vicente estuary, Sao 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.
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