Spatiotemporal variation of ringed seal blubber cortisol levels in the Canadian Arctic.
| Title: | Spatiotemporal variation of ringed seal blubber cortisol levels in the Canadian Arctic. |
|---|---|
| Authors: | Ogloff WR; Freshwater Institute, Fisheries and Oceans Canada, 501 University Crescent, Winnipeg, MB R3T 2N6, Canada.; Anderson RA; Office of the Minister of Natural Resources Canada, Ottawa, ON K1A 0E4, Canada.; Yurkowski DJ; Freshwater Institute, Fisheries and Oceans Canada, 501 University Crescent, Winnipeg, MB R3T 2N6, Canada.; Department of Biological Sciences, University of Manitoba, 66 Chancellors Circle, Winnipeg, MB R3T 2N2, Canada.; Debets CD; Department of Biological Sciences, University of Manitoba, 66 Chancellors Circle, Winnipeg, MB R3T 2N2, Canada.; Anderson WG; Department of Biological Sciences, University of Manitoba, 66 Chancellors Circle, Winnipeg, MB R3T 2N2, Canada.; Ferguson SH; Freshwater Institute, Fisheries and Oceans Canada, 501 University Crescent, Winnipeg, MB R3T 2N6, Canada.; Department of Biological Sciences, University of Manitoba, 66 Chancellors Circle, Winnipeg, MB R3T 2N2, Canada. |
| Source: | Journal of mammalogy [J Mammal] 2022 Jun 17; Vol. 103 (5), pp. 1208-1220. Date of Electronic Publication: 2022 Jun 17 (Print Publication: 2022). |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Oxford University Press Country of Publication: England NLM ID: 2985081R Publication Model: eCollection Cited Medium: Print ISSN: 0022-2372 (Print) Linking ISSN: 00222372 NLM ISO Abbreviation: J Mammal Subsets: PubMed not MEDLINE |
| Imprint Name(s): | Publication: 2015- : Oxford Oxford University Press; Original Publication: Lawrence, Kan. [etc.] American Society of Mammalogists. |
| Abstract: | Climate change in the Arctic has widespread and complex effects on the health of animals and their populations. We used radioimmunoassay to measure blubber cortisol in ringed seals (Pusa hispida) sampled in Ulukhaktok, Inuvialuit Settlement Region, Northwest Territories, Canada (spring, 2002, 2004-2005, 2007-2012) and Arviat, Nunavut, Canada (autumn, 2003-2012) to examine chronic stress relative to biology (age, sex, length), body condition (blubber depth), and diet (δ13C, δ15N, and isotopic niche size). Ulukhaktok ringed seals had higher cortisol concentrations overall (0.46 ± 0.04 ng/g) than Arviat ringed seals (0.36 ± 0.03 ng/g), and these higher concentrations were associated with higher muscle δ15N and lower blubber thickness. In contrast, blubber cortisol concentrations for Arviat ringed seals decreased with blubber depth and increased with age, though testing of age effects individually suggests that age-related patterns are weak. Annual mean cortisol concentration increased from 2003 to 2012 in Arviat ringed seals, but low sample sizes precluded analysis of annual patterns for Ulukhaktok ringed seals. The trend of increased cortisol over time in Arviat ringed seals suggests that they might be experiencing greater chronic stress over time, which could have implications for numerous population health metrics including reproduction and pup recruitment.; (© The Author(s) 2022. Published by Oxford University Press on behalf of the American Society of Mammalogists.) |
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| Contributed Indexing: | Keywords: Arctic; Arviat; Pusa hispida; Ulukhaktok; blubber; body condition; chronic stress; cortisol; ringed seal; stable isotopes |
| Entry Date(s): | Date Created: 20221020 Latest Revision: 20221021 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC9562108 |
| DOI: | 10.1093/jmammal/gyac047 |
| PMID: | 36262800 |
| Database: | MEDLINE |
Journal Article