PMID- 37879388
OWN - NLM
STAT- MEDLINE
DCOM- 20240105
LR  - 20240105
IS  - 1096-0953 (Electronic)
IS  - 0013-9351 (Linking)
VI  - 241
DP  - 2024 Jan 15
TI  - Polychlorinated biphenyl and polybrominated diphenyl ether profiles vary with 
      feeding ecology and marine rearing distribution among 10 Chinook salmon 
      (Oncorhynchus tshawytscha) stocks in the North Pacific Ocean.
PG  - 117476
LID - S0013-9351(23)02280-6 [pii]
LID - 10.1016/j.envres.2023.117476 [doi]
AB  - Chinook salmon (Oncorhynchus tshawytscha) along the west coast of North America 
      have experienced significant declines in abundance and body size over recent 
      decades due to several anthropogenic stressors. Understanding the reasons 
      underlying the relatively high levels of persistent organic pollutants (POPs) in 
      Chinook stocks is an important need, as it informs recovery planning for this 
      foundation species, as well for the Chinook-dependent Resident killer whales 
      (Orcinus orca, RKW) of British Columbia (Canada) and Washington State (USA). We 
      evaluated the influence of stock-related differences in feeding ecology, using 
      stable isotopes, and marine rearing ground on the concentrations and patterns of 
      polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in 
      Chinook salmon. A principal components analysis (PCA) revealed a clear divergence 
      of PCB and PBDE congener patterns between Chinook with a nearshore rearing 
      distribution ('shelf resident') versus a more offshore distribution. Shelf 
      resident Chinook had 12-fold higher PCB concentrations and 46-fold higher PBDE 
      concentrations relative to offshore stocks. Shelf resident Chinook had PCB and 
      PBDE profiles that were heavier and dominated by more bioaccumulative congeners, 
      respectively. The higher delta(13)C and delta(15)N in shelf resident Chinook compared to 
      the offshore rearing stocks, and their different marine distributions explain the 
      large divergence in contaminant levels and profiles, with shelf resident stocks 
      being heavily influenced by land-based sources of industrial contamination. 
      Results provide compelling new insight into the drivers of contaminant 
      accumulation in Chinook salmon, raise important questions about the consequences 
      for their health, and explain a major pathway to the heavily POP-contaminated 
      Resident killer whales that consume them.
CI  - Crown Copyright (c) 2023. Published by Elsevier Inc. All rights reserved.
FAU - Holbert, S
AU  - Holbert S
AD  - School of Resource and Environmental Management, Simon Fraser University, 
      Burnaby, BC, Canada; Pacific Science Enterprise Centre, Fisheries and Oceans 
      Canada, West Vancouver, BC, Canada.
FAU - Colbourne, K
AU  - Colbourne K
AD  - Pacific Science Enterprise Centre, Fisheries and Oceans Canada, West Vancouver, 
      BC, Canada.
FAU - Fisk, A T
AU  - Fisk AT
AD  - School of the Environment, University of Windsor, Windsor, ON, Canada.
FAU - Ross, P S
AU  - Ross PS
AD  - Raincoast Conservation Foundation, Sidney, BC, Canada.
FAU - MacDuffee, M
AU  - MacDuffee M
AD  - Raincoast Conservation Foundation, Sidney, BC, Canada.
FAU - Gobas, F A P C
AU  - Gobas FAPC
AD  - School of Resource and Environmental Management, Simon Fraser University, 
      Burnaby, BC, Canada.
FAU - Brown, T M
AU  - Brown TM
AD  - School of Resource and Environmental Management, Simon Fraser University, 
      Burnaby, BC, Canada; Pacific Science Enterprise Centre, Fisheries and Oceans 
      Canada, West Vancouver, BC, Canada; School of the Environment, University of 
      Windsor, Windsor, ON, Canada. Electronic address: Tanya.Brown@dfo-mpo.gc.ca.
LA  - eng
PT  - Journal Article
DEP - 20231023
PL  - Netherlands
TA  - Environ Res
JT  - Environmental research
JID - 0147621
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
RN  - 7REL09ZX35 (pentabromodiphenyl ether)
RN  - 0 (Halogenated Diphenyl Ethers)
SB  - IM
MH  - Animals
MH  - *Polychlorinated Biphenyls/analysis
MH  - Salmon/metabolism
MH  - Halogenated Diphenyl Ethers/analysis
MH  - Pacific Ocean
MH  - *Whale, Killer/metabolism
MH  - British Columbia
OTO - NOTNLM
OT  - Chinook salmon
OT  - Contaminants
OT  - Feeding ecology
OT  - Marine distribution
OT  - Resident killer whales
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/10/26 00:42
MHDA- 2024/01/05 06:42
CRDT- 2023/10/25 19:18
PHST- 2023/07/10 00:00 [received]
PHST- 2023/10/20 00:00 [revised]
PHST- 2023/10/21 00:00 [accepted]
PHST- 2024/01/05 06:42 [medline]
PHST- 2023/10/26 00:42 [pubmed]
PHST- 2023/10/25 19:18 [entrez]
AID - S0013-9351(23)02280-6 [pii]
AID - 10.1016/j.envres.2023.117476 [doi]
PST - ppublish
SO  - Environ Res. 2024 Jan 15;241:117476. doi: 10.1016/j.envres.2023.117476. Epub 2023 
      Oct 23.