Ecological and biological determinants of trace elements accumulation in liver and kidney of Pontoporia blainvillei.

摘要: The present work tested whether ecological and biological variables have an influence on the assimilation of trace elements by tissues a cetacean from Western South Atlantic Ocean. No significant differences were observed in concentrations for both sexes. As individuals two sampling areas belong to distinct genetic morphological populations, animals similar body length older southeastern than southern coast. liver showed highest mercury, whereas levels cadmium found kidney. Hepatic selenium south coast about four times as high those southeast However, arsenic kidney coastal areas. increased with coast, although no correlations (PN0.05) between either area renal hepatic concentrations. A positive linear relationship was molar Hg Se all (r 2 =0.93; Pb0.001), presenting Se:Hg ratios close 4. Differences among Hg, Cd dolphins probably due preferred prey, bioavailability each marine environment, environment (water temperature, net primary production). consequence, this species can be considered result surrounding environment. © 2007 Elsevier B.V. All rights reserved.