title: Organochlorine pesticides and polychlorinated biphenyls (PCBs) in sediments and biota from four US Arctic lakes.
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.
authors.affiliation: Department of Fisheries and Wildlife, 104 Nash Hall, O. S. U., Corvallis, Oregon 97331, USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Allen-Gil
authors.forename: C P
authors.initials: CP
authors.lastname: Gubala
authors.forename: R
authors.initials: R
authors.lastname: Wilson
authors.forename: D H
authors.initials: DH
authors.lastname: Landers
authors.forename: T L
authors.initials: TL
authors.lastname: Wade
authors.forename: J L
authors.initials: JL
authors.lastname: Sericano
authors.forename: L R
authors.initials: LR
authors.lastname: Curtis
mesh_terms: D000818:Animals; D001110:Arctic Regions; D018533:Biomass; D004785:Environmental Pollutants / Q000032:analysis*; D005618:Fresh Water / Q000737:chemistry*; D007306:Insecticides / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014481:United States
chemical_list: D004785:Environmental Pollutants; D007306:Insecticides; D012989:Soil Pollutants; D011078:Polychlorinated Biphenyls