Organochlorine Pesticides and Polychlorinated Biphenyls (PCBs) in Sediments and Biota from Four US Arctic Lakes |
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| Authors: | S M Allen-Gil C P Gubala R Wilson D H Landers T L Wade J L Sericano L R Curtis |
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| Institution: | (1) Department of Fisheries and Wildlife, 104 Nash hall, O. S. U., Corvallis, Oregon 97331, USA , US;(2) Institute of Natural Systems Engineering, Department of Civil and Environmental Engineering, UMC 4110, Utah State University, Logan, Utah 84322, USA , US;(3) USEPA National Health and Environmental Effects Research Laboratory, 200 SW 35th St., Corvallis, Oregon 97333, USA , US;(4) Geochemical and Environmental Research Group, Texas A&M University, 833 Graham Road, College Station, Texas 77845, USA , US;(5) Department of Environmental Health, College of Public and Allied Health, east Tennessee State University, Hohnson City, Tennessee 37614-0682, USA , US |
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| Abstract: | Organochlorine (OC) concentrations in surface sediment, snails (Lymnea sp.), and two freshwater fish species (grayling, Thymallus arcticus; and lake trout, Salvelinus namaycush) from four lakes in the US Arctic were determined. In surface sediment, chlorinated benzenes (including hexachlorobenzene,
HCB), and p,p′-DDT were the primary analytes detected (max = 0.7 ng/g dry wt), while individual polychlorinated biphenyl (PCB) congeners
were always below 0.1 ng/g. A wider range of compounds and higher concentrations were found in lake trout, the top predatory
fish species in the same lakes. The concentration ranges for hexachlorocyclohexanes (HCHs), chlordane-related compounds (CHLORs),
DDTs, and PCBs in lake trout and grayling were similar to those reported for other arctic freshwater fish (1–100 ng/g wet
wt), but one to two orders of magnitude lower than Great Lakes salmonids. Nitrogen isotope analysis confirmed that differences
in OC concentrations between grayling and lake trout are explained partly by differences in food web position.
Received: 30 August 1996/Accepted: 24 July 1997 |
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