Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales
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...
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fthighwire:oai:open-archive.highwire.org:jexbio:212/24/3939 2023-05-15T15:41:58+02:00 Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales Kane, E. A. Marshall, C. D. 2009-12-15 00:00:00.0 text/html http://jeb.biologists.org/cgi/content/short/212/24/3939 https://doi.org/10.1242/jeb.034686 en eng Company of Biologists http://jeb.biologists.org/cgi/content/short/212/24/3939 http://dx.doi.org/10.1242/jeb.034686 Copyright (C) 2009, Company of Biologists Research Articles TEXT 2009 fthighwire https://doi.org/10.1242/jeb.034686 2013-04-02T07:37:34Z 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 function of hyolingual displacement and rapid jaw opening, and is likely to be significantly enhanced by lip pursing behaviors. Some degree of subambient pressure was measured in all species, with belugas reaching 126 kPa. Functional variations of suction generation during feeding demonstrate a wider diversity of feeding behaviors in odontocetes than previously thought. However, odontocete suction generation is convergent with that of more basal aquatic vertebrates. Text Beluga* Delphinapterus leucas HighWire Press (Stanford University) Pacific Journal of Experimental Biology 212 24 3939 3950 |
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Research Articles |
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Research Articles Kane, E. A. Marshall, C. D. Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales |
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Research Articles |
description |
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 function of hyolingual displacement and rapid jaw opening, and is likely to be significantly enhanced by lip pursing behaviors. Some degree of subambient pressure was measured in all species, with belugas reaching 126 kPa. Functional variations of suction generation during feeding demonstrate a wider diversity of feeding behaviors in odontocetes than previously thought. However, odontocete suction generation is convergent with that of more basal aquatic vertebrates. |
format |
Text |
author |
Kane, E. A. Marshall, C. D. |
author_facet |
Kane, E. A. Marshall, C. D. |
author_sort |
Kane, E. A. |
title |
Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales |
title_short |
Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales |
title_full |
Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales |
title_fullStr |
Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales |
title_full_unstemmed |
Comparative feeding kinematics and performance of odontocetes: belugas, Pacific white-sided dolphins and long-finned pilot whales |
title_sort |
comparative feeding kinematics and performance of odontocetes: belugas, pacific white-sided dolphins and long-finned pilot whales |
publisher |
Company of Biologists |
publishDate |
2009 |
url |
http://jeb.biologists.org/cgi/content/short/212/24/3939 https://doi.org/10.1242/jeb.034686 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Beluga* Delphinapterus leucas |
genre_facet |
Beluga* Delphinapterus leucas |
op_relation |
http://jeb.biologists.org/cgi/content/short/212/24/3939 http://dx.doi.org/10.1242/jeb.034686 |
op_rights |
Copyright (C) 2009, Company of Biologists |
op_doi |
https://doi.org/10.1242/jeb.034686 |
container_title |
Journal of Experimental Biology |
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212 |
container_issue |
24 |
container_start_page |
3939 |
op_container_end_page |
3950 |
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1766374855491452928 |