Description:

This study sampled largemouth bass, northern pike, black crappie, brown bullhead, and yellow perch from Killarney Lake, a lateral lake on the Coeur dAlene River in northern Idaho (17010301, 17010303) and analyzed edible flesh for concentrations of zinc, lead, mercury, cadmium, copper, and arsenic. Mean concentrations of zinc were highest in yellow perch and lowest in brown bullheads, considerable lower than the 45 mg/kg action level from the literature. Mean concentrations of copper ranged from 0.265 mg/kg in black crappie to 0.31 mg/kg in yellow perch, northern pike and largemouth bass, also well below the recommended action level of 20 mg/kg. Mean concentrations of lead ranged from 0.014 mg/kg in largemouth bass to 0.183 mg/kg in brown bullheads, compared to the 3.50 mg/kg action level. Mean concentrations of cadmium ranged from 0.018 to 0.04 mg/kg, highest in brown bullheads and lowest in northern pike, compared to the action level of 0.07 mg/kg. Mean mercury concentrations ranged from 0.034 mg/kg in brown bullheads to 0.093 mg/kg in yellow perch, also less than the 1 mg/kg action level. Concentrations of arsenic were generally below detection limits for all species but varied considerable between 2 laboratories which conducted analysis on replicate tissue samples. Comparisons of fish flesh content with allowable human intakes resulted in estimation of a maximum allowable consumption of 3.1 kg/week of fish from Killarney Lake. Bennet, D.H., C.M. Falter, and W.D. Sawle. 1990. Technical Bulletin 90-6. Bureau of Land Management, Boise, ID. 45 pp.

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Record Type:DOCUMENT

Product Published Date:10/24/1997

Record Last Revised:09/26/2003

Record ID: 5943

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Title :KILLARNEY LAKE, COEUR D'ALENE RIVER SYSTEM IDAHO - PILOT SAMPLING FOR HEAVY METALS IN FISH FLESH, 1990

Version :1.0

State :ID

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Title :KILLARNEY LAKE, COEUR D'ALENE RIVER SYSTEM IDAHO - PILOT SAMPLING FOR HEAVY METALS IN FISH FLESH, 1990

Data Use & Constraints :Concentrations of metals in fish flesh obtained from the UI VET Science Laboratory were closely comparable to those results obtained by Laucks Laboratories. In general, concentrations measured by Laucks Laboratories generally fell within the 95% confidence intervals of the samples analyzed at the UI but were consistently lower than those measured for the same species except for mercury in largemouth bass. When multiple samples from the same fish were tested, concentrations of metals varied slightly but were within 95% confidence intervals. No consistent trends were obvious between mean metal concentration from the analyses of 10 individuals and the individual and mean concentrations from the 3 other tissue samples.