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PH25 Wildlife Ecotoxicology II
(PH293) Effect of plasma lipid content on chlorinated hydrocarbon concentrations in bald eagles.
Cesh, L1, Garcelon, D2, Williams, T1, Elliott, J1, 3, 1 Simon Fraser University, Burnaby, BC, Canada2 Institute for Wildlife Studies, Arcata, CA, USA3 Canadian Wildlife Service, Delta, BC, Canada
ABSTRACT- Use of blood samples as a non-destructive technique for assessing both exposure and effects of environmental toxicants in avian wildlife has become increasingly common in recent years. In this study, we examined the influence of the post-feeding flux of nutrients and lipids on plasma lipid and contaminant levels in samples of nestling bald eagles from the British Columbia and California coasts. All samples were analyzed for a suite of organochlorine pesticides and polychlorinated biphenyls. Samples were also assayed for glycerol, triglycerides and for total lipids. We also took sequential blood samples of captive adult and juvenile bald eagles before, during, and after a fasting and feeding cycle. DDE concentrations were significantly higher in nestling eagles from Catalina Island than from sites on the British Columbia coast, consistent with a known source in that area. Triglyceride and glycerol content in plasma appeared to vary with mass and therefore age of the nestlings. There were significant relationships between concentrations of DDE and triglycerides in plasma. Data will be further analyzed and compared to results of the study of captive eagles.
Key words: Lipids, Bald eagle, Organochlorines
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