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Title: Body burden contaminants in whole fish tissue and livers from the Slave River (NWT)

The Slave River Environmental Monitoring Program was established in 1990 to assess whether the commercial and subsistence fisheries in the region were being impacted by downstream transport and subsequent bioaccumulation of contaminants in the fish. Lake whitefish (Coregonus clupeaformis), northern pike (Esox lucius), burbot (Lota lota), walleye (Stizostedion vitreum), and longnose suckers (Catostomus catostomus) were collected in the Slave River at Fort Smith (NWT) and whole fish tissue was evaluated for contaminant accumulation. Due to their high lipid concentration and their importance as food source, burbot livers were also analyzed. A broad organochlorine scan was conducted for selected dioxins and furans, total PCB concentrations and individual congeners, pesticide residues such as DDT and its metabolites, dieldrin, lindane, mirex, and toxaphene. Also, PAHs, and various chlorinated phenolics such as chlorophenols, chlorocatechols, and chloroguaiacols were also examined. Although contaminants were detected in the fish, concentrations generally were minimal. Levels of total PCBs in whole fish tissue ranged from 0.006 to 0.08 mg/kg, while average concentrations in burbot livers were 0.23 mg/kg. The toxic dioxin isomer 2,3,7,8-TCDD was detected once in whole fish tissue (walleye) at levels of 0.86 pg/g, while concentrations in burbot livers ranged from 1.2 to 9.96 pg/g. Higher levelsmore » of TCDD (11.4 pg/g) were noted in fish caught at the reference site Chitty/Alexie Lake, although this body of water has no known sources of dioxins and furans. The presence of these compounds indicates a long-range transport and deposition mechanism. Toxaphene concentrations in fish averaged 0.3 mg/kg, while concentrations of p,p{prime}-DDE ranged from 0.001 to 0.008 mg/kg over the monitoring period. Levels of PAHs and chlorinated phenolics were generally below analytical detection limits, as were most of the pesticide residues.« less
Authors:
 [1] ; ; ;  [2] ;  [3] ;  [4]
  1. Univ. of Waterloo, Ontario (Canada)
  2. Dept. of Indian Affairs and Northern Development, Yellowknife, Northwest Territories (Canada)
  3. Department of Fisheries and Oceans, Burlington, Ontario (Canada)
  4. Department of Fisheries and Oceans, Yellowknife, Northwest Territories (Canada)
Publication Date:
OSTI Identifier:
398218
Report Number(s):
CONF-9511137-
ISBN 1-880611-03-1; TRN: IM9649%%426
Resource Type:
Conference
Resource Relation:
Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
Publisher:
Society of Environmental Toxicology and Chemistry, Pensacola, FL (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; NORTHWEST TERRITORIES; WATER POLLUTION; RIVERS; BIOLOGICAL INDICATORS; CHLORINATED AROMATIC HYDROCARBONS; BIOLOGICAL ACCUMULATION; POLYCYCLIC AROMATIC HYDROCARBONS; DIOXIN; FISHES; BIOLOGICAL STRESS; POLYCHLORINATED BIPHENYLS; TISSUE DISTRIBUTION