Data from: Paradoxical escape responses by narwhals (Monodon monoceros)
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https://datadryad.org/dataset/doi:10.5061/dryad.4vn11
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资源简介：
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 recorder to monitor
physiological and behavioral responses of East Greenland narwhals after
release from net entanglement and stranding. Escaping narwhals displayed a
paradoxical cardiovascular down-regulation (extreme bradycardia with heart
rate ≤4 beats per minute) superimposed on exercise up-regulation (stroke
frequency >25 strokes per minute and energetic costs three to six
times the resting rate of energy expenditure) that rapidly depleted
onboard oxygen stores. We attribute this unusual reaction to opposing
cardiovascular signals—from diving, exercise, and neurocognitive fear
responses—that challenge physiological homeostasis.
提供机构：
Dryad
创建时间：
2017-11-07
