PMID- 28803190
OWN - NLM
STAT- MEDLINE
DCOM- 20180814
LR  - 20180814
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 610-611
DP  - 2018 Jan 1
TI  - Legacy and new halogenated persistent organic pollutants in polar bears from a 
      contamination hotspot in the Arctic, Hudson Bay Canada.
PG  - 121-136
LID - S0048-9697(17)32033-8 [pii]
LID - 10.1016/j.scitotenv.2017.08.035 [doi]
AB  - A large and complex suite of 295 legacy and new halogenated persistent organic 
      pollutants (POPs) were investigated in fat or liver tissue samples of polar bears 
      collected in 2013-2014 from Southern (SHB) and Western (WHB) subpopulations of 
      the Canadian Arctic contaminants hotspot of Hudson Bay. A total of 210 POPs were 
      detected and/or quantifiable with some frequency in all fat or liver samples. POP 
      profile and concentration differences were investigated both within (e.g. age and 
      sex) and between the two subpopulations. Two time-point comparisons were made 
      relative to POPs reported for Hudson Bay polar bears harvested in 2007-2008. 
      SigmaPolychlorinated biphenyl (PCB) concentrations at both time points were the most 
      concentrated of the POP groups, and were spatially uniform with no detectable 
      influence of sex or age, as were concentrations of the dominant congener CB153. 
      SigmaChlordanes (SigmaCHLs, 74-79% oxychlordane) and the Sigmaperfluoroalkyl substances 
      (SigmaPFASs,  approximately 60% perfluorooctane sulfonate (PFOS)) had the second greatest POP group 
      concentrations in SHB and WHB respectively, with SigmaPFASs and SigmaCHLs being 
      significantly influenced by age and/or sex. SigmaCHLs were spatially uniform but 
      SigmaPFASs were greater in the SHB bears, as were e.g. some flame retardants, due to 
      e.g. local contamination and/or changes in bear behavior and diet. Endosulfans 
      and hexabromocyclododecane were detectable in samples from 2007-2008 but not from 
      2013-2014, which is consistent with their global POP regulations. 
      SigmaPolychlorinated naphthalenes (SigmaPCNs) were consistently detected at relatively 
      high concentrations compared to other arctic wildlife, however these 
      concentrations were low relative to legacy POPs. SigmaShort-chain chlorinated 
      paraffins (SigmaSCCPs) were major contributors to the overall POPs burden with 
      concentrations comparable to other legacy POPs, though there was no significant 
      difference between or within subpopulations for PCNs or SCCPs. Except for 
      octachlorostyrene, POPs concentrations were generally lower in female and male 
      bears from SHB in 2013-2014 relative to 2007-2008, however those of WHB males 
      were greater over the same timeframe for almost all POPs.
CI  - Crown Copyright (c) 2017. Published by Elsevier B.V. All rights reserved.
FAU - Letcher, R J
AU  - Letcher RJ
AD  - Ecotoxicology and Wildlife Health Division, Environment and Climate Change 
      Canada, National Wildlife Research Centre, Carleton University, Ottawa, ON, 
      Canada; Department of Chemistry, Carleton University, Ottawa, ON, Canada. 
      Electronic address: robert.letcher@canada.ca.
FAU - Morris, A D
AU  - Morris AD
AD  - Ecotoxicology and Wildlife Health Division, Environment and Climate Change 
      Canada, National Wildlife Research Centre, Carleton University, Ottawa, ON, 
      Canada; Department of Chemistry, Carleton University, Ottawa, ON, Canada.
FAU - Dyck, M
AU  - Dyck M
AD  - Government of Nunavut, Igoolik, NU, Canada.
FAU - Sverko, E
AU  - Sverko E
AD  - Laboratory of Urban Water Resource and Environment, Harbin Institute of 
      Technology, Harbin 150090, China.
FAU - Reiner, E J
AU  - Reiner EJ
AD  - Ontario Ministry of the Environment and Climate Change, 125 Resources Rd, 
      Toronto, ON, Canada.
FAU - Blair, D A D
AU  - Blair DAD
AD  - Ecotoxicology and Wildlife Health Division, Environment and Climate Change 
      Canada, National Wildlife Research Centre, Carleton University, Ottawa, ON, 
      Canada.
FAU - Chu, S G
AU  - Chu SG
AD  - Ecotoxicology and Wildlife Health Division, Environment and Climate Change 
      Canada, National Wildlife Research Centre, Carleton University, Ottawa, ON, 
      Canada.
FAU - Shen, L
AU  - Shen L
AD  - Ontario Ministry of the Environment and Climate Change, 125 Resources Rd, 
      Toronto, ON, Canada.
LA  - eng
PT  - Journal Article
DEP - 20170810
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Environmental Pollutants)
RN  - 12789-03-6 (Chlordan)
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
SB  - IM
MH  - Adipose Tissue/*chemistry
MH  - Animals
MH  - Arctic Regions
MH  - Bays
MH  - Canada
MH  - Chlordan/analysis
MH  - Environmental Monitoring
MH  - Environmental Pollutants/*analysis
MH  - Female
MH  - Liver/*chemistry
MH  - Male
MH  - Polychlorinated Biphenyls/analysis
MH  - *Ursidae
OTO - NOTNLM
OT  - Arctic
OT  - Canada
OT  - Hudson Bay
OT  - Legacy and new contaminants
OT  - Persistent organic pollutants
OT  - Polar bears
EDAT- 2017/08/15 06:00
MHDA- 2018/08/15 06:00
CRDT- 2017/08/14 06:00
PHST- 2017/04/05 00:00 [received]
PHST- 2017/08/03 00:00 [revised]
PHST- 2017/08/03 00:00 [accepted]
PHST- 2017/08/15 06:00 [pubmed]
PHST- 2018/08/15 06:00 [medline]
PHST- 2017/08/14 06:00 [entrez]
AID - S0048-9697(17)32033-8 [pii]
AID - 10.1016/j.scitotenv.2017.08.035 [doi]
PST - ppublish
SO  - Sci Total Environ. 2018 Jan 1;610-611:121-136. doi: 
      10.1016/j.scitotenv.2017.08.035. Epub 2017 Aug 10.