Polychlorinated Dibenzo-p-Dioxins (PCDDs), Dibenzofurans (PCDFs), Biphenyls (PCBs), and Organochlorine Pesticides in Yellow-Blotched Map Turtle from the Pascagoula River Basin, Mississippi, USA |
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| Authors: | K Kannan M Ueda J A Shelby M T Mendonca M Kawano M Matsuda T Wakimoto J P Giesy |
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| Institution: | (1) 213 National Food Safety and Toxicology Center, Department of Zoology, Institute for Environmental Toxicology, Michigan State University, East Lansing, Michigan 48824, USA , US;(2) Department of Environment Conservation, Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan , JP;(3) Department of Zoology and Wildlife, Auburn University, Auburn, Alabama 36849, USA , US |
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| Abstract: | Concentrations of polychlorinated-dibenzo-p-dioxins (PCDDs), -dibenzofurans (PCDFs), -biphenyls (PCBs), and organochlorine pesticides were measured in tissues of map
turtles collected from two locations in the Pascagoula River drainage of Mississippi, USA. PCBs were most predominant among
the organochlorines with a concentration of up to 99 ng/g, wet weight (580 ng/g, lipid weight) in livers. The greatest concentration
of PCDDs/DFs of 1.1 pg/g, wet weight (15.76 pg/g, lipid weight) was found in the liver of a male turtle. The measured concentrations
of organochlorines were less than those reported for turtles from the Great Lakes Basin and upper St. Lawrence River. PCBs
contributed 90–99% of the total estimated 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQs). Particularly, PCB congeners 105, 118, and 156 accounted for 68–80% of the estimated toxic potency
of PCBs in turtles.
Received: 4 May 1999/Accepted: 20 September 1999 |
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