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OLS Field Name OLS Field Data

Main Title Long-Term Effects of Methylmercuric Chloride on Three Generations of Brook Trout (Salvelinus fontinalis): Toxicity, Accumulation, Distribution, and Elimination.

Author McKim, J. M. ; Olson, G. F. ; Holcombe, G. W. ; Hunt., E. P. ;

CORP Author Environmental Research Lab.-Duluth, Minn.

Year Published 1976

Report Number EPA/600/J-76/031;

Stock Number PB-265 314

Additional Subjects Toxicity ; Trout ; Fishes ; Tissues(Biology) ; Mercury organic compounds ; Chlorine organic compounds ; Bioassay ; Exposure ; Mortality ; Physiological effects ; Toxicology ; Accumulation ; Distribution ; Elimination ; Tables(Data) ; Congenital abnormalities ; Larvae ; Reproduction(Biology) ; Concentration(Composition) ; Lethal dosage ; Permissible dosage ; Reprints ; Water pollution effects(Animals) ; Mercury/chloro-methyl ; Salvelinus fontinalis ; Bioaccumulation ; Maximum permissible exposure level ; Teratology

Holdings

Library	Call Number	Additional Info	Location	Last Modified	Checkout Status
NTIS	PB-265 314	Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.		06/23/1988

Collation 16p

Abstract

During a 144-wk period three generations of brook trout (Salvelinus fontinalis) were continuously exposed to mean water concentrations of methylmercuric chloride (MMC) of 2.93, 0.93, 0.29, 0.09, 0.03, and less than 0.010 (control) micrograms Hg/liter. During the first 39 wk the highest concentration (2.93 micrograms Hg/liter) produced deformities and 88% mortality of first-generation adults. At an MMC concentration of 0.93 micrograms Hg/liter, second-generation trout developed deformities and all but one female died during the 108-wk exposure. No significant effects on survival, growth, or reproduction of second-generation trout were noted at any of the lower MMC concentrations. No toxic symptoms were observed in the third generation at the three lowest MMC concentrations. The maximum acceptable toxicant concentration (MATC) for brook trout exposed to MMC in this water with a hardness of 45 mg/liter (as CACO3) and a pH of 7.5 fell between 0.93 and 0.29 micrograms Hg/liter. The mean 96-h LC50 for yearling (200 g) and 20-wk-old (12 g) juvenile brook trout exposed to MMC was 75.0 micrograms Hg/liter, and the application factor (MATC/96-h LC50) lies between 0.004 and 0.013.

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