Profiles of polychlorinated biphenyl congeners, organochlorine pesticides and butlyns in southern sea otters and their prey
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Abstract
Concentrations of organochlorine pesticides, polychlorinated biphenyl (PCB)congeners, and butyltins were measured in sea otters and selected prey species (invertebrates) collected from the California (USA) coast. Polychlorinated biphenyls, DDTs (sum of p,p′-dichlorodiphenyldichloroethylene [p,p-DDE], p,p′-dichlorodiphenyldichloroethane [p,p-DDD], andp,p′-DDT), and butyltins were the major contaminants found in sea otters and their prey. Lipid-normalized concentrations of PCBs and DDT in sea otter livers were 60- and 240-fold greater than those found in the prey. Great biomagnification of PCBs and DDT in sea otters is suggested to result from their high per-capita intake of diet compared with those of other marine mammals. Profiles of PCB congeners in sea otters and prey species suggest a great capacity of sea otters to biotransform lower-chlorinated congeners. Sea otters seem to possess a greater ability than cetaceans to metabolize PCBs. The 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents of non- and mono-ortho PCBs in sea otters and certain prey species were at or above the theoretical threshold for toxic effects.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Profiles of polychlorinated biphenyl congeners, organochlorine pesticides and butlyns in southern sea otters and their prey |
| Series title | Environmental Toxicology and Chemistry |
| DOI | 10.1897/03-53 |
| Volume | 23 |
| Issue | 1 |
| Year Published | 2004 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | National Wildlife Health Center |
| Description | 8 p. |
| First page | 49 |
| Last page | 56 |
| Country | United States |
| State | California |
| Other Geospatial | Coastal Areas |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |