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Temporal trend of mercury in relation to feeding habits and food availability in arctic foxes (Vulpes lagopus) from Svalbard, Norway

Permanent link
https://hdl.handle.net/10037/17706
DOI
https://doi.org/10.1016/j.scitotenv.2019.03.239
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Date
2019-03-20
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Author
Hallanger, Ingeborg G.; Fuglei, Eva; Yoccoz, Nigel Gilles; Pedersen, Åshild Ønvik; König, Max; Routti, Heli Anna Irmeli
Abstract
We investigated the temporal trend of mercury (Hg) in arctic foxes from Svalbard, Norway sampled in the period 1997–2014 (n = 109, from 11 trapping seasons). We used linear models to investigate the effect of trapping season, feeding habits (δ13C), food availability from marine and terrestrial ecosystems (reindeer carcasses and sea ice cover), sex, age and body condition on liver total Hg (THg) levels. Liver THg levels increased in arctic foxes with 7.2% (95% CI: 2.3, 9.6) per year when the concentrations were adjusted for variation of δ13C, sea ice cover, and reindeer carcasses, whereas the raw annual trend was 3.5% (CI: −0.11, 7.2). However, the THg levels in arctic foxes from Svalbard are still lower than other marine mammals. We also demonstrate that arctic fox terrestrial food consumption is important for lowering the overall THg levels in this species.
Publisher
Elsevier
Citation
Hallanger I, Fuglei E, Yoccoz NG, Pedersen ÅØ, König M, Routti HAI. Temporal trend of mercury in relation to feeding habits and food availability in arctic foxes (Vulpes lagopus) from Svalbard, Norway. Science of the Total Environment. 2019;670:1125-1132
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  • Artikler, rapporter og annet (arktisk og marin biologi) [1633]
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