As sea ice melts, new findings add to
concerns about the effects of ocean noise and increased human activity on
deep-diving Arctic whales
Date: December
7, 2017
Source:
University of California - Santa Cruz
Summary:
Stress from human disturbances could cause
behavioral responses in narwhals that are inconsistent with their physiological
capacities, researchers say. They found that narwhals released after
entanglement in nets and outfitted with heart monitors performed a series of
deep dives, swimming hard to escape, while their heart rates dropped to
unexpectedly low levels of three to four beats per minute.
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