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Extreme diving in mammals: first estimates of behavioural aerobic dive limits in Cuvier's beaked whales

Quick, Nicola J.; Cioffi, William R.; Shearer, Jeanne M.; Fahlman, Andreas; Read, Andrew J.

JOURNAL OF EXPERIMENTAL BIOLOGY
2020
VL / 223 - BP / - EP /
abstract
We analysed 3680 dives from 23 satellite-linked tags deployed on Cuvier's beaked whales to assess the relationship between long duration dives and inter-deep dive intervals and to estimate aerobic dive limit (ADL). The median duration of presumed foraging dives was 59 min and 5% of dives exceeded 77.7 min. We found no relationship between the longest 5% of dive durations and the following inter-deep dive interval nor any relationship with the ventilation period immediately prior to or following a long dive. We suggest that Cuvier's beaked whales have low metabolic rates, high oxygen storage capacities and a high acid-buffering capacity to deal with the by-products of both aerobic and anaerobic metabolism, which enables them to extend dive durations and exploit their bathypelagic foraging habitats.

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