Mercury in fish from the Pinchi Lake Region, British Columbia, Canada

Environmental Pollution
Shari A WeechK M Cheng

Abstract

Water, surface sediments, and <40 cm rainbow trout (Oncorhynchus mykiss) and northern pikeminnow (Ptychocheilus oregonensis) were collected from Pinchi Lake, British Columbia, and from several nearby reference lakes. Hg concentrations in sediment samples from Pinchi L. were highly elevated compared to sediments from reference lakes, especially in sites adjacent to and downstream of a former Hg mine. In both fish species examined, Hg concentration was positively related to age and/or fork length. In northern pikeminnow, Hg concentrations were also positively related to trophic level (deltaN). Hg concentrations in both fish species were highest in Pinchi L., and were higher in pikeminnow than in rainbow trout of similar size. Average Hg concentrations in small rainbow trout from all lakes, including Pinchi L., were lower than dietary levels reported to cause reproductive impairment in common loons (Gavia immer); however, Hg levels in small pikeminnow from Pinchi L. were sufficiently high to be of concern. The risk for Hg toxicity in the study area is greatest for animals that consume larger piscivorous fish such as larger northern pikeminnow or lake trout, which are known from previous studies to contain higher Hg concentrations.

References

Feb 22, 2000·The Science of the Total Environment·F RigetP Aastrup

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Citations

Sep 1, 2012·Food Additives & Contaminants. Part B, Surveillance·Zhu HuangYing Tan
May 30, 2009·Ecological Applications : a Publication of the Ecological Society of America·James G Wiener, Thomas H Suchanek
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Jan 31, 2016·Archives of Environmental Contamination and Toxicology·Marc LucotteMatthieu Moingt
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Aug 14, 2012·Environmental Toxicology and Chemistry·Yan LinThorjorn Larssen
May 16, 2018·The Science of the Total Environment·Tiffany N PenlandForrest W Sessions

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