Food resources influence levels of persistent organic pollutants and stable isotopes of carbon and nitrogen in tissues of Arctic foxes (Vulpes lagopus) from the Pribilof Islands, Alaska. (8th September 2017)

• Record Type: Journal Article
• Authors: Bolton, Jennie L.; White, Paula A.; Burrows, Douglas G.; Lundin, Jessica I.; Ylitalo, Gina M.
• Is Part Of: Polar research. Volume 36(2017)Supplement 1
• Publication Date: 2017-09-08
• Subjects: Bering Sea -- marine food web -- Pribilof fox -- conservation -- feeding ecology -- POPs; ANOVA: analysis of variance -- CI: confidence interval -- DDT: dichlorodiphenyltrichloroethane pesticide plus dichlorodiphenyldichloroethane and dichlorodiphenyldichoroethylene -- GC/MS: gas chromatography / mass spectrometry -- GLM: general linear model -- HCB: hexachlorobenzene -- LOQ: lower limit of quantitation -- NOAA: National Oceanic and Atmospheric Administration -- NWFSC: Northwest Fisheries Science Center -- PCA: principal component analysis -- PCB: polychlorinated biphenyl -- POP: persistent organic pollutant -- SRM: standardized reference material -- TLC/FID: thin-layer chromatography / flame ionization detection -- Tukey's HSD: honest significant difference test.; Polar regions -- Research -- Periodicals; Polar regions -- Periodicals; 508.311
• DOI: 10.1080/17518369.2017.1310994
• Languages: English
• ISSNs: 0800-0395

Abstract

ABSTRACT: The Arctic fox ( Vulpes lagopus ) is a small canid with a circumpolar Arctic distribution. Several subspecies are recognized, including a subspecies known as the Pribilof fox ( V. l. pribilofensis ) endemic to the Pribilof Islands of Alaska, USA. Pribilof fox tissues were collected from the islands of St. Paul ( n = 38) and St. George ( n = 13). Levels of persistent organic pollutants (POPs) and stable isotopes of carbon and nitrogen were measured and the findings related to sex, age class, island and access to anthropogenic food resources using ANOVA and principal component analysis. The rank order for POPs in fat was polychlorinated biphenyls (∑PCBs) > chlordanes (∑CHLs) ≫ hexachlorocyclohexanes (∑HCHs) > DDTs (∑DDTs) > hexachlorobenzene (HCB) ~ polybrominated diphenyl ethers (∑PBDEs). Adult females had lower mean levels of most POPs (∑PCBs, ∑CHLs, ∑HCHs, ∑DDTs) and lower δ 15 N values than adult males. Foxes on St. Paul had significantly higher levels of most POPs than those on St. George, though St. George foxes were significantly higher in HCB. Foxes with high probability of access to anthropogenic foods had significantly lower levels of ∑DDTs and lower δ 15 N values than foxes with a low probability of access. The observed differences in contaminant and stable isotope levels were consistent with fox use patterns of different food resources. POP concentrations in the tissues of some Pribilof foxes, especially from St. Paul, were higher than those associated with thresholds for adverse health effects. POPs may therefore be a factor for consideration in the conservation of Pribilof foxes.