Inter-species differences in polychlorinated biphenyl patterns from five sympatric species of odontocetes: can PCBs be used as tracers of feeding ecology?
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AuthorsMéndez-Fernandez, P. (Paula); Simon-Bouhet, B. (Benoit); Bustamante, P. (Paco); Chouvelon, T. (Tiphaine); Ferreira, M. (Marisa); López, A. (Alfredo); Moffat, C.F. (Colin); Pierce, G.J. (Graham); Russell, M. (Marie); Santos, M.B. (María Begoña); Spitz, J. (Jerome); Vingada, J.V. (José); Webster, L. (Lynda); Read, F.L. (Fiona); González, A.F. (Angel); Caurant, F. (Florence)
KeywordsPersistent organic pollutants
Northwest Iberian Peninsula
Concentrations of thirty two polychlorinated biphenyls (PCBs) were determined in the blubber of five sympatric species of odontocetes stranded or by-caught along the Northwest coast of the Iberian Peninsula: common dolphin (Delphinus delphis), long-finned pilot whale (Globicephala melas), harbour porpoise (Phocoena phocoena), striped dolphin (Stenella coeruleoalba) and bottlenose dolphin (Tursiops truncatus). Multivariate analyses were applied to evaluate the ability of PCB patterns to discriminate these sympatric species and to determine which eco-biological factors influence these patterns, thus evaluating the relevance of PCB concentrations as biogeochemical tracers of feeding ecology. The five species could be separated according to their PCB patterns. Different exposure to these contaminants, a consequence of their different dietary preferences or habitats, together with potentially dissimilar metabolic capacities, likely explain these results; sex, age, habitat and the type of prey ...
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