Trace elements and organochlorines in surf scoters from San Francisco Bay, 1985 |
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| Authors: | Harry M Ohlendorf Katherine C Marois Roy W Lowe Thomas E Harvey Paul R Kelly |
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| Institution: | (1) U.S. Fish and Wildlife Service, Patuxent Wildlife Research Center, Pacific Coast Research Station, USA;(2) Department of Wildlife and Fisheries Biology, University of California, 95616 Davis, CA, USA;(3) Present address: CH2M Hill, 3840 Rosin Court, Suite 110, 95834 Sacramento, CA, USA;(4) U.S. Fish and Wildlife Service, San Francisco Bay National Wildlife Refuge, P.O. Box 524, 94560 Newark, CA, USA;(5) Present address: U.S. Fish and Wildlife Service, Hatfield Marine Science Center, 97365 Newport, OR, USA;(6) Present address: U.S. Fish and Wildlife Service, 2800 Cottage Way, 95825 Sacramento, CA, USA;(7) California Department of Fish and Game, P.O. Box 47, 94599 Yountville, CA, USA;(8) Present address: California Department of Fish and Game, Non-game Heritage Program, 1416 Ninth Street (Room 1225), 95814 Sacramento, CA, USA |
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| Abstract: | Surf scoters (Melanitta perspicillata) were collected from 6 locations in San Francisco Bay during January and March 1985. Overall, mean concentrations of cadmium and zinc were higher in livers of scoters from the southern region of the Bay, whereas mean iron and lead were higher in those from the northern Bay region. Mean concentrations of arsenic, copper, lead, zinc, aluminum (January only) and iron (January) also differed among individual locations. Mean concentrations of copper and zinc increased, arsenic decreased, and cadmium remained the same between January and March. Selenium and mercury concentrations in scoter livers were not significantly correlated (P>0.05), but cadmium concentrations in livers and kidneys were positively correlated (P<0.0001), and body weight was negatively related to mercury concentration in the liver (P<0.05). Body weight differed among locations but not between January and March. Body weight was correlated with lipid content (P<0.0001). DDE and PCBs were each detected in 34 of 36 scoter carcasses. DDE increased significantly between January and March at Richmond Harbor, but BCBs did not differ between January and March at the 3 locations that could be tested. |
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