Relationship Between Trophic Level and Total Mercury Concentrations in 5 Steller Sea Lion Prey Species
Relationship between trophic level and total mercury concentrations in 5 Steller sea lion prey species Item Type Poster Authors Johnson, Gabrielle; Rea, Lorrie; Castellini, J. Margaret; Loomis, Todd; O'Hara, Todd Download date 24/09/2021 18:03:56 Link to Item http://hdl.handle.net/11122/3461 Relationship between trophic level and total mercury concentrations in 5 Steller sea lion prey species Gabrielle Johnson 1,2, Lorrie Rea 2,3,4, J. Margaret Castellini 1,4, Todd Loomis 5 and Todd O’Hara 4,6 1School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK 99775, 2Alaska Department of Fish and Game , Division of Wildlife Conservation, 1300 College Road, Fairbanks, AK 99701 3Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, 4Wildlife Toxicology Laboratory, University of Alaska Fairbanks, Fairbanks, AK 99775 5Ocean Peace Inc., 4201 21st Avenue West Seattle, WA 98199, 6Department of Veterinary Medicine, College of Natural Sciences and Mathematics, University of Alaska Fairbanks, Fairbanks, AK 99775 Abstract: Results: Conclusions: Total mercury concentrations [THg] were measured in 5 Steller sea lion finfish prey species collected in the eastern Aleutian Islands to determine if the amount and/or variation in mercury in select prey could explain the wide range of [THg] in sea lion pup hair and blood (Castellini et al. 0.20 • In 3 of the 5 prey species (ARFL, KAFL and PACO) [THg] linearly 2012, Rea et al. 2013). Atka mackerel (ATMA; Pleurogrammus monopterygius), Pacific cod Walleye pollock (PACO; Gadus macrocephalus), walleye pollock (WAPO; Theragra chalcogramma), arrowtooth 0.18 increased with length of the fish suggesting that [THg] Atka mackerel flounder (ARFL; Atheresthes stomias), and Kamchatka flounder (KAFL; Atheresthes evermanni) bioaccumulates with age in these species.
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