Cortisol levels in narwhal (Monodon monoceros) blubber from 2000 to 2019
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چکیده
منابع مشابه
Extreme physiological adaptations as predictors of climatechange sensitivity in the narwhal, Monodon monoceros
Rapid changes in sea ice cover associated with global warming are poised to have marked impacts on polarmarinemammals.Here we examine skeletalmuscle characteristics supporting swimming and diving in one polar species, the narwhal, and use these attributes to further document this cetacean’s vulnerability to unpredictable sea ice conditions and changing ecosystems. We found that extreme morpholo...
متن کاملAspartic acid racemization rate in narwhal (Monodon monoceros) eye lens nuclei estimated by counting of growth layers in tusks
Aspartic acid racemization rate in narwhal (Monodon monoceros) eye lens nuclei estimated by counting of growth layers in tusks Eva Garde, Mads Peter Heide-Jørgensen, Susanne Ditlevsen & Steen H. Hansen 1 Center for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5 7, DK-1350 Copenhagen Ø, Denmark 2 Greenland Institute of Natural Resources, PO Box 570, DK...
متن کاملWinter Feeding Intensity of Narwhals (monodon Monoceros)
Stomach contents from 121 narwhals (Monondon monoceros) harvested in the eastern Canadian High Arctic and West Greenland were used to quantify seasonal changes in feeding activity and prey selection. Stomachs collected from summer harvests were mostly empty with little evidence of recent feeding. Stomachs collected in late fall and winter harvests had considerable amounts of undigested material...
متن کاملParadoxical escape responses by narwhals (Monodon monoceros).
Until recent declines in Arctic sea ice levels, narwhals (Monodon monoceros) have lived in relative isolation from human perturbation and sustained predation pressures. The resulting naïvety has made this cryptic, deep-diving cetacean highly susceptible to disturbance, although quantifiable effects have been lacking. We deployed a submersible, animal-borne electrocardiograph-accelerometer-depth...
متن کاملDiving behaviour of narwhals (Monodon monoceros) at two coastal localities in the Canadian High Arctic
In August 1999 and 2000, four suction-cup-attached time–depth recorders (TDRs) were deployed and retrieved from narwhals (Monodon monoceros) in Tremblay Sound, Baffin Island, and Creswell Bay, Somerset Island, Nunavut, Canada. The TDRs remained on the whales for between 12 and 33 h and collected 64.5 h of dive data. Mean dive depths ranged from 20.8 m (SD = 14.8 m) to 50.8 m (SD = 43.8 m) and m...
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ژورنال
عنوان ژورنال: Arctic Science
سال: 2021
ISSN: 2368-7460
DOI: 10.1139/as-2020-0034