Persistent organic pollutants and stable isotopes in biopsy samples (2004/2006) from Southern Resident killer whales.
Mar Pollut Bull
; 54(12): 1903-11, 2007 Dec.
Article
em En
| MEDLINE
| ID: mdl-17931664
ABSTRACT
"Southern Resident" killer whales include three "pods" (J, K and L) that reside primarily in Puget Sound/Georgia Basin during the spring, summer and fall. This population was listed as "endangered" in the US and Canada following a 20% decline between 1996 and 2001. The current study, using blubber/epidermis biopsy samples, contributes contemporary information about potential factors (i.e., levels of pollutants or changes in diet) that could adversely affect Southern Residents. Carbon and nitrogen stable isotopes indicated J- and L-pod consumed prey from similar trophic levels in 2004/2006 and also showed no evidence for a large shift in the trophic level of prey consumed by L-pod between 1996 and 2004/2006. Sigma PCBs decreased for Southern Residents biopsied in 2004/2006 compared to 1993-1995. Surprisingly, however, a three-year-old male whale (J39) had the highest concentrations of Sigma PBDEs, Sigma HCHs and HCB. POP ratio differences between J- and L-pod suggested that they occupy different ranges in winter.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Tecido Adiposo
/
Exposição Ambiental
/
Orca
Limite:
Animals
Idioma:
En
Revista:
Mar Pollut Bull
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos