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Persistent organic pollutants in Chinook salmon (Oncorhynchus tshawytscha): implications for resident killer whales of British Columbia and adjacent waters

Environmental toxicology and chemistry, 2009, Vol.28 (1), p.148-161 [Peer Reviewed Journal]

Copyright © 2009 SETAC ;Copyright Allen Press Publishing Services Jan 2009 ;ISSN: 0730-7268 ;EISSN: 1552-8618 ;DOI: 10.1897/08-125.1 ;PMID: 18702563

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Title:
Persistent organic pollutants in Chinook salmon (Oncorhynchus tshawytscha): implications for resident killer whales of British Columbia and adjacent waters
Author: Cullon, Donna L ; Yunker, Mark B ; Alleyne, Carl ; Dangerfield, Neil J ; O'Neill, Sandra ; Whiticar, Michael J ; Ross, Peter S
Subjects: Adults ; Animal behavior ; Animals ; bioaccumulation ; Body Burden ; British ; British Columbia ; Cetacea ; Chinook salmon ; Circuit boards ; Congeners ; Contamination ; Copyrights ; DDT ; DDT (pesticide) ; Dietary exposure ; Documents ; Endangered & extinct species ; Estimates ; Feeding ; Feeding Behavior ; Fish ; HCH (pesticide) ; Killer whale ; lipid content ; Lipids ; Marine ; Metabolism ; Oncorhynchus tshawytscha ; Orcinus orca ; organic compounds ; Persistent organic pollutants ; Pollutants ; Polychlorinated biphenyls ; polychlorinated dibenzodioxins ; polychlorinated dibenzofurans ; Presses ; Printed circuits ; Raw materials ; Salmon ; Salmon - metabolism ; Studies ; trophic relationships ; Water Pollutants, Chemical - analysis ; Water Pollutants, Chemical - metabolism ; Water Pollutants, Chemical - toxicity ; water pollution ; Whale, Killer ; Whales ; wildlife food habits
Is Part Of: Environmental toxicology and chemistry, 2009, Vol.28 (1), p.148-161
Description: We measured persistent organic pollutant (POP) concentrations in chinook salmon (Oncorhynchus tshawytscha) in order to characterize dietary exposure in the highly contaminated, salmon-eating northeastern Pacific resident killer whales. We estimate that 97 to 99% of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), dichlorodiphenyltrichloroethane (DDT), and hexachlorocyclohexane (HCH) in returning adult chinook were acquired during their time at sea. Highest POP concentrations (including PCBs, PCDDs, PCDFs, and DDT) and lowest lipids were observed in the more southerly chinook sampled. While feeding by salmon as they enter some more POP-contaminated near-shore environments inevitably contribute to their contamination, relationships observed between POP patterns and both lipid content and δ13C also suggest a migration-related metabolism and loss of the less-chlorinated PCB congeners. This has implications for killer whales, with the more PCB-contaminated salmon stocks in the south partly explaining the 4.0 to 6.6 times higher estimated daily intake for sigma PCBs in southern resident killer whales compared to northern residents. We hypothesize that the lower lipid content of southerly chinook stocks may cause southern resident killer whales to increase their salmon consumption by as much as 50%, which would further increase their exposure to POPs.
Publisher: Hoboken: Wiley Periodicals, Inc
Language: English
Identifier: ISSN: 0730-7268
EISSN: 1552-8618
DOI: 10.1897/08-125.1
PMID: 18702563
Source: AUTh Library subscriptions: ProQuest Central
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Persistent organic pollutants in Chinook salmon (Oncorhynchus tshawytscha): implications for resident killer whales of British Columbia and adjacent waters

Copyright © 2009 SETAC ;Copyright Allen Press Publishing Services Jan 2009 ;ISSN: 0730-7268 ;EISSN: 1552-8618 ;DOI: 10.1897/08-125.1 ;PMID: 18702563

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