Voles Clethrionomys rutilus

Mink (Mustela vison) collected from the Northwest Territories of Canada between 1991 and 1995 had liver mirex concentrations between 0.08 and 0.39 pg/kg FW. These extremely low mirex concentrations were, nevertheless, higher than liver mirex concentrations in prey species (snowshoe hare, Lepus americanus, 0.08 to 0.13 pg/kg FW northern red-backed vole, Clethrionomys rutilus, 0.32 pg/kg FW), suggesting that mirex biomagnification in mammalian wildlife food chains is possible (Poole et al. 1998). 

Elevated nickel concentrations in Norwegian wildlife are linked to emissions from Russian nickel smelters. In Norway, nickel concentrations were elevated in livers and kidneys of moose (Alces alces) and caribou (Rangifer tarandm) because of atmospheric transport of wastes from nickel-processing plants of nearby Russian towns. In Russia between 1974 and 1992, three species of voles (Clethrionomys glareolus, Clethrionomys rutilus. Lemmas lemmas) were eliminated from the immediate vicinity of a copper-nickel smelter that discharged 2700 metric tons of nickel annually... 

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