Hunting by the Stroke: How Foraging Drives Diving Behavior and Locomotion of East-Greenland Narwhals (Monodon monoceros)

Autor: Outi M. Tervo, Susanne Ditlevsen, Manh C. Ngô, Nynne H. Nielsen, Susanna B. Blackwell, Terrie M. Williams, Mads Peter Heide-Jørgensen
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Frontiers in Marine Science, Vol 7 (2021)
Druh dokumentu: article
ISSN: 2296-7745
DOI: 10.3389/fmars.2020.596469
Popis: Deep diving air-breathing species by necessity must balance submergence time and level of exercise during breath-holding: a low activity level preserves oxygen stores and allows longer duration submergence whereas high activity levels consume oxygen quickly and shorten submergence time. In this study, we combined high-resolution multi sensor animal-borne tag data to investigate diving behavior and locomotion styles of the narwhal (Monodon monoceros) (n = 13, mean record length 91 h)–a deep diving Arctic species. Narwhals in this study dove down to >800 m but despite the deep diving abilities, one-third of the dives (33%) were shallow (>100 m) and short in duration (
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