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Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters.
Environ Toxicol Chem. 2020 12; 39(12):2462-2474.ET

Abstract

Mercury is found in Arctic marine mammals that are important in the diet of northern Indigenous peoples. The objectives of the present long-term study, spanning a 45-yr period, were to 1) investigate the temporal trends of total mercury (THg; muscle and liver) and selenium (Se; liver) in ringed seals (Pusa hispida) from different regions of the Canadian Arctic; and 2) examine possible relationships with age, diet, and climate parameters such as air temperature, precipitation, climatic indices, and ice-coverage. Ringed seals were collected by hunters in northern communities in the Beaufort Sea, Central Arctic, Eastern Baffin Island, Hudson Bay, and Ungava/Nunatsiavut regions (Canada) between 1972 and 2017. Mercury levels did not change through time in seal liver, but THg levels in muscle decreased in seals from Hudson Bay (-0.91%/yr) and Ungava/Nunatsiavut (-1.30%/yr). Carbon stable isotope values in seal muscle decreased significantly through time in 4 regions. Selenium-to-THg ratios were found to be >1 for all years and regions. Variation partitioning analyses across regions indicated that THg trends in seals were mostly explained by age (7.3-21.7%), climate parameters (3.5-12.5%), and diet (up to 9%); climate indices (i.e., Arctic and North Atlantic Oscillations, Pacific/North American pattern) explained the majority of the climate portion. The THg levels had a positive relationship with Arctic Oscillation for multiple regions. Associations of THg with air temperature, total precipitation, and sea-ice coverage, as well as with North Atlantic Oscillation and Pacific/North American pattern were found to vary with tissue type and geographical area. Environ Toxicol Chem 2020;39:2462-2474. © 2020 Her Majesty the Queen in Right of Canada. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC. Reproduced with the permission of the Minister of Fisheries and Oceans Canada.

Authors+Show Affiliations

Environment and Climate Change Canada, Montreal, Quebec, Canada.Environment and Climate Change Canada, Montreal, Quebec, Canada.Environment and Climate Change Canada, Burlington, Ontario, Canada.Arctic Aquatic Research Division, Department of Fisheries and Oceans, Winnipeg, Manitoba, Canada.Environment and Climate Change Canada, Montreal, Quebec, Canada.Arctic Aquatic Research Division, Department of Fisheries and Oceans, Winnipeg, Manitoba, Canada.Nunavik Research Centre, Kuujjuaq Quebec, Canada.Environment and Climate Change Canada, Burlington, Ontario, Canada.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

33025637

Citation

Houde, Magali, et al. "Mercury in Ringed Seals (Pusa Hispida) From the Canadian Arctic in Relation to Time and Climate Parameters." Environmental Toxicology and Chemistry, vol. 39, no. 12, 2020, pp. 2462-2474.
Houde M, Taranu ZE, Wang X, et al. Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters. Environ Toxicol Chem. 2020;39(12):2462-2474.
Houde, M., Taranu, Z. E., Wang, X., Young, B., Gagnon, P., Ferguson, S. H., Kwan, M., & Muir, D. C. G. (2020). Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters. Environmental Toxicology and Chemistry, 39(12), 2462-2474. https://doi.org/10.1002/etc.4865
Houde M, et al. Mercury in Ringed Seals (Pusa Hispida) From the Canadian Arctic in Relation to Time and Climate Parameters. Environ Toxicol Chem. 2020;39(12):2462-2474. PubMed PMID: 33025637.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mercury in Ringed Seals (Pusa hispida) from the Canadian Arctic in Relation to Time and Climate Parameters. AU - Houde,Magali, AU - Taranu,Zofia E, AU - Wang,Xiaowa, AU - Young,Brent, AU - Gagnon,P, AU - Ferguson,Steve H, AU - Kwan,Michael, AU - Muir,Derek C G, Y1 - 2020/10/06/ PY - 2020/05/28/received PY - 2020/06/16/revised PY - 2020/08/19/accepted PY - 2020/10/8/pubmed PY - 2021/2/5/medline PY - 2020/10/7/entrez KW - Climate change KW - Inuit Nunangat KW - Metals KW - Pinnipeds KW - Temporal trends SP - 2462 EP - 2474 JF - Environmental toxicology and chemistry JO - Environ Toxicol Chem VL - 39 IS - 12 N2 - Mercury is found in Arctic marine mammals that are important in the diet of northern Indigenous peoples. The objectives of the present long-term study, spanning a 45-yr period, were to 1) investigate the temporal trends of total mercury (THg; muscle and liver) and selenium (Se; liver) in ringed seals (Pusa hispida) from different regions of the Canadian Arctic; and 2) examine possible relationships with age, diet, and climate parameters such as air temperature, precipitation, climatic indices, and ice-coverage. Ringed seals were collected by hunters in northern communities in the Beaufort Sea, Central Arctic, Eastern Baffin Island, Hudson Bay, and Ungava/Nunatsiavut regions (Canada) between 1972 and 2017. Mercury levels did not change through time in seal liver, but THg levels in muscle decreased in seals from Hudson Bay (-0.91%/yr) and Ungava/Nunatsiavut (-1.30%/yr). Carbon stable isotope values in seal muscle decreased significantly through time in 4 regions. Selenium-to-THg ratios were found to be >1 for all years and regions. Variation partitioning analyses across regions indicated that THg trends in seals were mostly explained by age (7.3-21.7%), climate parameters (3.5-12.5%), and diet (up to 9%); climate indices (i.e., Arctic and North Atlantic Oscillations, Pacific/North American pattern) explained the majority of the climate portion. The THg levels had a positive relationship with Arctic Oscillation for multiple regions. Associations of THg with air temperature, total precipitation, and sea-ice coverage, as well as with North Atlantic Oscillation and Pacific/North American pattern were found to vary with tissue type and geographical area. Environ Toxicol Chem 2020;39:2462-2474. © 2020 Her Majesty the Queen in Right of Canada. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC. Reproduced with the permission of the Minister of Fisheries and Oceans Canada. SN - 1552-8618 UR - https://www.unboundmedicine.com/medline/citation/33025637/Mercury_in_Ringed_Seals__Pusa_hispida__from_the_Canadian_Arctic_in_Relation_to_Time_and_Climate_Parameters_ L2 - https://doi.org/10.1002/etc.4865 DB - PRIME DP - Unbound Medicine ER -