Heavy metals and essential elements in Commerson's dolphins (Cephalorhynchus c. commersonii) from the southwestern South Atlantic Ocean

摘要: A survey of the elemental contents K, Mg, Mn, Na, Cl, Br, Cs, Co, Rb, Fe, Zn, Al, Ti, V, As, Ag, Au and Cd in liver, kidney muscle was performed specimens Commerson’s dolphins (Cephalorhynchus c. commersonii) from subantarctic waters. The concentrations were determined by Instrumental Neutron Activation Analysis derives animals incidentally caught artisanal fishing nets. Liver had highest 897(79) μg g−1 DW (dry weight) (average; standard deviation parenthesis), Cd, 35 (24) DW; 9,200 (1,700) 6,800 (1,100) 73(12) Mg 954 (71) DW. Potassium Cs ranged 12,510–13,020 0.230–0.252 DW, respectively; Zn Mn similar liver (117–122.1 3.66–16.5 respectively). Silver high 5.4(5.0) 1.2(2.7) Gold, Co As no differences among tissues. Likewise, as other odontocete species, essential elements showed little variation between analyzed, since they are regulated biochemically; however, heavy metals variability. This study constitutes first large description composition waters South Atlantic Ocean.