Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias
Changes in the feeding mechanism with feeding behavior were investigated using high-speed video and electromyography to examine the kinematics and motor pattern of prey capture, manipulation and transport in the spiny dogfish Squalus acanthias (Squalidae: Squaliformes), In this study, Squalus acanth...
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1998
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ftunisfloridatam:oai:digitalcommons.usf.edu:bin_facpub-1309 2023-05-15T18:51:05+02:00 Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias Wilga, Cheryl D. Motta, Philip J. 1998-04-20T07:00:00Z application/pdf https://digitalcommons.usf.edu/bin_facpub/310 http://jeb.biologists.org/content/201/9/1345 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/bin_facpub/310 http://jeb.biologists.org/content/201/9/1345 Integrative Biology Faculty and Staff Publications spiny dogfish Squalus acanthias kinematics electromyography feeding behavior elasmobranch jaw protrusion article 1998 ftunisfloridatam 2021-10-09T07:12:28Z Changes in the feeding mechanism with feeding behavior were investigated using high-speed video and electromyography to examine the kinematics and motor pattern of prey capture, manipulation and transport in the spiny dogfish Squalus acanthias (Squalidae: Squaliformes), In this study, Squalus acanthias used bath suction and ram behaviors to capture and manipulate prey, while only suction was used to transport prey. The basic kinematic feeding sequence observed in other aquatic-feeding lower vertebrates is conserved in the spiny dogfish, Prey capture, bite manipulation and suction transport events are characterized by a common pattern of head movements and motor activity, but are distinguishable by differences in duration and relative timing. In general, capture events are longer in duration than manipulation and transport events, as found in other aquatic-feeding lower vertebrates. Numerous individual effects were found, indicating that individual sharks are capable of varying head movements and motor activity among successful feeding events. Upper jaw protrusion in the spiny dogfish is not restricted by its orbitostylic jaw suspension; rather, the upper jaw is protruded by 30% of its head length, considerably more than in the lemon shark Negaprion brevirostris (Carcharhinidae: Carcharhiniformes) (18%) with its hyostylic jaw suspension. One function of upper jaw protrusion is to assist in jaw closure by protruding the upper jaw as well as elevating the lower jaw to close the gape, thus decreasing the time to jaw closure. The mechanism of upper jaw protrusion was found to differ between squaliform and carcharhiniform sharks. Whereas the levator palatoquadrati muscle assists in retracting the upper jaw in the spiny dogfish, it assists in protruding the upper jaw in the lemon shark. This study represents the first comprehensive electromyographic and kinematic analysis of the feeding mechanism in a squaliform shark. Article in Journal/Newspaper spiny dogfish Squalus acanthias Digital Commons University of South Florida (USF) |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
spiny dogfish Squalus acanthias kinematics electromyography feeding behavior elasmobranch jaw protrusion |
spellingShingle |
spiny dogfish Squalus acanthias kinematics electromyography feeding behavior elasmobranch jaw protrusion Wilga, Cheryl D. Motta, Philip J. Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias |
topic_facet |
spiny dogfish Squalus acanthias kinematics electromyography feeding behavior elasmobranch jaw protrusion |
description |
Changes in the feeding mechanism with feeding behavior were investigated using high-speed video and electromyography to examine the kinematics and motor pattern of prey capture, manipulation and transport in the spiny dogfish Squalus acanthias (Squalidae: Squaliformes), In this study, Squalus acanthias used bath suction and ram behaviors to capture and manipulate prey, while only suction was used to transport prey. The basic kinematic feeding sequence observed in other aquatic-feeding lower vertebrates is conserved in the spiny dogfish, Prey capture, bite manipulation and suction transport events are characterized by a common pattern of head movements and motor activity, but are distinguishable by differences in duration and relative timing. In general, capture events are longer in duration than manipulation and transport events, as found in other aquatic-feeding lower vertebrates. Numerous individual effects were found, indicating that individual sharks are capable of varying head movements and motor activity among successful feeding events. Upper jaw protrusion in the spiny dogfish is not restricted by its orbitostylic jaw suspension; rather, the upper jaw is protruded by 30% of its head length, considerably more than in the lemon shark Negaprion brevirostris (Carcharhinidae: Carcharhiniformes) (18%) with its hyostylic jaw suspension. One function of upper jaw protrusion is to assist in jaw closure by protruding the upper jaw as well as elevating the lower jaw to close the gape, thus decreasing the time to jaw closure. The mechanism of upper jaw protrusion was found to differ between squaliform and carcharhiniform sharks. Whereas the levator palatoquadrati muscle assists in retracting the upper jaw in the spiny dogfish, it assists in protruding the upper jaw in the lemon shark. This study represents the first comprehensive electromyographic and kinematic analysis of the feeding mechanism in a squaliform shark. |
format |
Article in Journal/Newspaper |
author |
Wilga, Cheryl D. Motta, Philip J. |
author_facet |
Wilga, Cheryl D. Motta, Philip J. |
author_sort |
Wilga, Cheryl D. |
title |
Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias |
title_short |
Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias |
title_full |
Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias |
title_fullStr |
Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias |
title_full_unstemmed |
Conservation and Variation in the Feeding Mechanism of the Spiny Dogfish Squalus Acanthias |
title_sort |
conservation and variation in the feeding mechanism of the spiny dogfish squalus acanthias |
publisher |
Digital Commons @ University of South Florida |
publishDate |
1998 |
url |
https://digitalcommons.usf.edu/bin_facpub/310 http://jeb.biologists.org/content/201/9/1345 |
genre |
spiny dogfish Squalus acanthias |
genre_facet |
spiny dogfish Squalus acanthias |
op_source |
Integrative Biology Faculty and Staff Publications |
op_relation |
https://digitalcommons.usf.edu/bin_facpub/310 http://jeb.biologists.org/content/201/9/1345 |
_version_ |
1766244876388663296 |