Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales

The Journal of Experimental Biology
E A Kane, Christopher D Marshall

Abstract

Cetaceans are thought to display a diversity of feeding modes that are often described as convergent with other more basal aquatic vertebrates (i.e. actinopterygians). However, the biomechanics of feeding in cetaceans has been relatively ignored by functional biologists. This study investigated the feeding behavior, kinematics and pressure generation of three odontocetes with varying feeding modes (belugas, Delphinapterus leucas; Pacific white-sided dolphins, Lagenorhynchus obliquidens; and long-finned pilot whales, Globicephala melas). Four feeding phases were recognized in all odontocetes: (I) preparatory, (II) jaw opening, (III) gular depression, and (IV) jaw closing. Belugas relied on a feeding mode that was composed of discrete ram and suction components. Pacific white-sided dolphins fed using ram, with some suction for compensation or manipulation of prey. Pilot whales were kinematically similar to belugas but relied on a combination of ram and suction that was less discrete than belugas. Belugas were able to purse the anterior lips to occlude lateral gape and form a small, circular anterior aperture that is convergent with feeding behaviors observed in more basal vertebrates. Suction generation in odontocetes is a functi...Continue Reading

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Citations

Apr 30, 2015·Integrative and Comparative Biology·Peter C WainwrightL Patricia Hernandez
Jan 30, 2015·Biology Letters·Neil P Kelley, Ryosuke Motani
Jun 4, 2016·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Christopher D Marshall
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Oct 28, 2017·The Journal of Experimental Biology·Lori L Timm-DavisChristopher D Marshall
Sep 29, 2017·Proceedings. Biological Sciences·Sarah S KienleRita S Mehta
Jun 22, 2019·Integrative and Comparative Biology·Emily A KaneChristopher D Marshall
Jun 14, 2018·The Journal of Experimental Biology·J A Goldbogen, P T Madsen
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Mar 3, 2017·Proceedings. Biological Sciences·David P HockingAlistair R Evans
Jul 14, 2020·Integrative and Comparative Biology·Stephen M DebanUlrike K Müller
Dec 3, 2021·The Journal of Experimental Biology·Nick A R JonesMike M Webster

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