Open AccessTemporal Trends of Brominated and Fluorinated Contaminants in Canadian Arctic Beluga Delphinapterus leucas
Author(s) -
Tristan A. Smythe,
Lisa L. Loseto,
Anders Bignert,
Bruno Rosenberg,
Wesley Budakowski,
Thor Halldorson,
Kerri Pleskach,
Gregg T. Tomy
Publication year - 2018
Publication title -
arctic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 4
ISSN - 2368-7460
DOI - 10.1139/as-2017-0044
Subject(s) - beluga whale , leucas , beluga , polybrominated diphenyl ethers , arctic , environmental science , environmental chemistry , population , the arctic , contamination , geography , pollutant , ecology , biology , fishery , environmental health , chemistry , oceanography , medicine , geology
Limited information exists regarding contemporary and historical emissions for many anthropogenic chemicals, especially for contaminants of emerging concern (CECs). This study examined temporal trends of several perfluoroalkyl substances (PFASs), polybrominated diphenyl ethers (PBDEs), and hexabromocyclododecanes (HBCDs) in three beluga whale (Delphinapterus leucas) populations from the Canadian Arctic [Hendrickson Island (HI), NT; Pangnirtung (PG), NU; and Sanikiluaq (SQ), NU] collected from 1982 to 2013. The confounding factors of animal size, age, and sex were included in the analyses, but were only significant for some CECs. The strongest temporal resolution was obtained from HI, which showed increasing trends in PBDEs (4.8%/year) and HBCDs (2.9%/year), and decreases in perfluoroalkylcarboxylic acids (PFCAs, −6.0%/year). Concentrations of perfluorooctanesulfonate (PFOS) were relatively stable between 1984 and 2010, increasing substantially in 2011; trends in perfluorooctanesulfonamide (PFOSA) concentr...
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