Fine scale distribution constrains cadmium accumulation rates in two geographical groups of Franciscana dolphin from Argentina

MARINE POLLUTION BULLETIN

卷:72

Article

Polizzi, P. S.^1,2  Chiodi Boudet, L. N.¹  Romero, M. B.^1,2  Denuncio, P. E.³  Rodriguez, D. H.^2,3  Gerpe, M. S.^1,2 

[1] Univ Nacl Mar del Plata, Fac Ciencias Exactas & Nat, IIMyC, Lab Toxicol Ambiental, RA-7600 Mar Del Plata, Buenos Aires, Argentina

[2] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

[3] Univ Nacl Mar del Plata, Fac Ciencias Exactas & Nat, IIMyC, Lab Mamiferos Marinos,Dept Ciencias Marinas, RA-7600 Mar Del Plata, Buenos Aires, Argentina

关键词: Pontoporia blainvillei;    Anchovy as cadmium vector;    Accumulation rates;    Fine scale distribution;    Geographic groups;   

DOI  :  10.1016/j.marpolbul.2013.05.003

来源: Elsevier

【 摘 要 】

Franciscana dolphin is an endemic cetacean in the southwestern Atlantic Ocean and is classified as Vulnerable A3d by the International Union for Conservation of Nature. Cadmium accumulation was assessed in two geographic groups from Argentina; one inhabits the La Plata River estuary, a high anthropogenic impacted environment, and the other is distributed in marine coastal, with negligible pollution. Despite the environment, marine dolphins showed an increase of renal Cd concentrations since trophic independence; while in estuarine dolphins was from 6 years. This is associated with dietary Argentine anchovy which was absent in the diet of estuarine dolphins, being a trophic vector of cadmium in shelf waters of Argentina. Cluster analysis also showed high levels of cd in association with the presence of anchovy in the stomach. The difference in the fine scale distribution of species influences dietary exposure to Cd and, along with other data, indicates two stocks in Argentina. (C) 2013 Elsevier Ltd. All rights reserved.

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