Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon
Specialized feeding behavior is generally reflected not only in skeletal anatomy (as has been the major focus of functional morphology literature) but also in muscular morphology and physiology. We show that this is the case for salmon feeding mechanics of king and pink salmon. King salmon (Oncorhyn...
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Friday Harbor Laboratories
2015
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ftunivwashington:oai:digital.lib.washington.edu:1773/34707 2023-05-15T17:52:52+02:00 Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon Kaczmarek, Elska Gidmark, Nicholas J. 2015-09 http://hdl.handle.net/1773/34707 en_US eng Friday Harbor Laboratories Blinks NSF REU Beacon Internship;Summer 2015 http://hdl.handle.net/1773/34707 salmonidae biomechanics functional morphology muscle physiology Other 2015 ftunivwashington 2023-03-12T18:55:20Z Specialized feeding behavior is generally reflected not only in skeletal anatomy (as has been the major focus of functional morphology literature) but also in muscular morphology and physiology. We show that this is the case for salmon feeding mechanics of king and pink salmon. King salmon (Oncorhynchus tshawytscha) eat small, fast fish; and pink salmon (Oncorhynchus gorbuscha) primarily filter feed on planktonic organisms by keeping their mouths open while swimming. Salmon close their jaws using the adductor mandibulae, which, like all skeletal muscles, is constrained by a strict relationship between muscle length and force. Muscles that are over-stretched or overshortened exert weaker forces than they do at optimal length, and muscle length corresponds to gape. We compared the force-length curves of king and pink salmon adductor mandibulae and demonstrated that the maximum bite force of king salmon is achieved closer to maximum gape (67% of max gape, n = 3). This may allow them to take advantage of optimal muscle length, and thus greater force production, when eating large or elusive prey. In pink salmon, the force-length curve is centered at a smaller relative gape, closer to mid-gape (43% of max gape, n = 6). This may facilitate filter feeding, allowing reasonably high forces at a range of medium gape sizes. The different feeding preferences of these species may have put different pressures on the evolution of jaw muscle physiology, resulting in distinct optimal solutions to the force-length constraint. Other/Unknown Material Oncorhynchus gorbuscha Pink salmon University of Washington, Seattle: ResearchWorks |
institution |
Open Polar |
collection |
University of Washington, Seattle: ResearchWorks |
op_collection_id |
ftunivwashington |
language |
English |
topic |
salmonidae biomechanics functional morphology muscle physiology |
spellingShingle |
salmonidae biomechanics functional morphology muscle physiology Kaczmarek, Elska Gidmark, Nicholas J. Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon |
topic_facet |
salmonidae biomechanics functional morphology muscle physiology |
description |
Specialized feeding behavior is generally reflected not only in skeletal anatomy (as has been the major focus of functional morphology literature) but also in muscular morphology and physiology. We show that this is the case for salmon feeding mechanics of king and pink salmon. King salmon (Oncorhynchus tshawytscha) eat small, fast fish; and pink salmon (Oncorhynchus gorbuscha) primarily filter feed on planktonic organisms by keeping their mouths open while swimming. Salmon close their jaws using the adductor mandibulae, which, like all skeletal muscles, is constrained by a strict relationship between muscle length and force. Muscles that are over-stretched or overshortened exert weaker forces than they do at optimal length, and muscle length corresponds to gape. We compared the force-length curves of king and pink salmon adductor mandibulae and demonstrated that the maximum bite force of king salmon is achieved closer to maximum gape (67% of max gape, n = 3). This may allow them to take advantage of optimal muscle length, and thus greater force production, when eating large or elusive prey. In pink salmon, the force-length curve is centered at a smaller relative gape, closer to mid-gape (43% of max gape, n = 6). This may facilitate filter feeding, allowing reasonably high forces at a range of medium gape sizes. The different feeding preferences of these species may have put different pressures on the evolution of jaw muscle physiology, resulting in distinct optimal solutions to the force-length constraint. |
format |
Other/Unknown Material |
author |
Kaczmarek, Elska Gidmark, Nicholas J. |
author_facet |
Kaczmarek, Elska Gidmark, Nicholas J. |
author_sort |
Kaczmarek, Elska |
title |
Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon |
title_short |
Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon |
title_full |
Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon |
title_fullStr |
Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon |
title_full_unstemmed |
Studying the Force-Length Relationship in the Adductor Mandibulae of Pink and King Salmon |
title_sort |
studying the force-length relationship in the adductor mandibulae of pink and king salmon |
publisher |
Friday Harbor Laboratories |
publishDate |
2015 |
url |
http://hdl.handle.net/1773/34707 |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_relation |
Blinks NSF REU Beacon Internship;Summer 2015 http://hdl.handle.net/1773/34707 |
_version_ |
1766160621036896256 |