Journal
MARINE POLLUTION BULLETIN
Volume 83, Issue 1, Pages 241-247Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2014.03.046
Keywords
Procellariiformes; Stable isotopes; Polychlorinated biphenyls; Organochlorine pesticides; Brazil
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) provided a scholarship
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Carbon and nitrogen stable isotopes in albatrosses and petrels collected off southern Brazil were compared with concentrations of organochlorine contaminants (0Cs). 613C and 515N values, as well as OCs concentrations, exhibited a high degree of variability among individuals and overlap among species. 313C values reflected latitudinal differences among species, with lower values found in Wandering and Tristan Albatrosses and higher values found in Black-browed and Atlantic Yellow-nosed Albatrosses and White-chinned Petrels. Some relationships were found between OCs and stable isotopes, but in general a partial 'uncoupling' was observed between OCs concentrations and stable isotopes ratios (especially for 615N). 613C and.515N values in Procellariiformes tissues during the non-breeding season appear to be a better indicator of foraging habitats than of trophic relationships, which may partially explain the high degree of variability between concentrations of OCs and stable isotopes ratios in birds with a diversified diet and wide foraging range. (C) 2014 Elsevier Ltd. All rights reserved.
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