Use of naturally occurring mercury to determine the importance of cutthroat trout to Yellowstone grizzly bears

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Preliminary estimates of the export of omega-3 highly unsaturated fatty acids (EPA+DHA) from aquatic to terrestrial ecosystems (2009, background): “For example, in the vicinity of Yellowstone Lake consumption of cutthroat trout ( Oncorhynchus clarki ) by grizzly bears is ~18 kg trout bear −1 year −1 (Felicetti et al. 2004) .”
Major components of grizzly bear diet across North America (2006, background): “For example, male bears consumed more spawning cutthroat trout (Oncorhynchus clarkii bouvieri (Jordan and Gilbert, 1883)) than females, and spawning fish are confined to a portion of the small streams in the Greater Yellowstone Ecosystem (Felicetti et al. 2004).”
Biology, Status, and Management of the Yellowstone Cutthroat Trout (2011, background): “…spawning streams have decreased (Haroldson et al. 2005), and estimates of Yellowstone cutthroat trout consumption by grizzly bears (2,226 fish annually; Felicetti et al. 2004) are less than 2% of the estimated number consumed by lake trout in the 1990s (Ruzycki et al. 2003; Felicetti et al. 2004).”
Nutritional ecology of ursids: a review of newer methods and management implications (2004, methodology): “For example, while most bear foods in terrestrial ecosystems contain 6 ppb mercury, salmon returning to hatcheries in Idaho contain 240 ppb mercury and spawning cutthroat trout (Oncorhynchus clarki) from Yellowstone Lake contain 508 ppb (SD ¼ 93) mercury in their dry matter (Felicetti et al. 2004).”