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- Title
Stressed and slim or relaxed and chubby? A simultaneous assessment of gray whale body condition and hormone variability.
- Authors
Lemos, Leila S.; Olsen, Amy; Smith, Angela; Burnett, Jonathan D.; Chandler, Todd E.; Larson, Shawn; Hunt, Kathleen E.; Torres, Leigh G.
- Abstract
Continued monitoring of body condition and hormone levels of this gray whale population will generate "health profiles" of individual whales, enabling assessment of change over time and potential identification and diagnosis for variations in population health. Hence, to increase our sample size for correlation analysis, we used BAI values measured within ± 14 days of a fecal sample collection from the same individual as gray whales do not significantly change their body condition within a period of two weeks (paired I t i -test using all BAI values of individuals assessed within 14 days in 2016, 2017, and 2018: I n i = 61, I p i =.86, I df i = 60, I t i = -0.174). In this study, we employed simultaneous multidisciplinary techniques to investigate the effects of body condition variability on hormones associated with stress (i.e., cortisol) and energy allocation (i.e., cortisol and thyroid hormones) in Eastern North Pacific (ENP) gray whales ( I Eschrichtius robustus i ). Conversely, the random factor of whale identity highly contributed to the Tm model ( I R i SP 2 sp c = 0.522, I R i SP 2 sp m = 0.835; Table 2). 2 TABLELinear mixed model selection parameters of gray whale glucocorticoid metabolite (GCm) and thyroid metabolite (Tm) concentrations relative to Body Area Index (BAI), sex, year, and day of the year (DOY).
- Subjects
WHALES; WHALING; CALVES; BALEEN whales; KILLER whale; HUMPBACK whale; THYROID hormone regulation
- Publication
Marine Mammal Science, 2022, Vol 38, Issue 2, p801
- ISSN
0824-0469
- Publication type
Article
- DOI
10.1111/mms.12877