Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei
The spotted ratfish Hydrolagus colliei is a holocephalan fish that consumes hard prey (durophagy) but lacks many morphological characters associated with durophagy in other cartilaginous fishes. We investigated its feeding biomechanics and biting performance to determine whether it can generate bite...
Published in: | Journal of The Royal Society Interface |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Royal Society
2008
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1098/rsif.2007.1325 https://royalsocietypublishing.org/doi/pdf/10.1098/rsif.2007.1325 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsif.2007.1325 |
id |
crroyalsociety:10.1098/rsif.2007.1325 |
---|---|
record_format |
openpolar |
spelling |
crroyalsociety:10.1098/rsif.2007.1325 2024-10-20T14:12:16+00:00 Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei Huber, Daniel R Dean, Mason N Summers, Adam P 2008 http://dx.doi.org/10.1098/rsif.2007.1325 https://royalsocietypublishing.org/doi/pdf/10.1098/rsif.2007.1325 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsif.2007.1325 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Journal of The Royal Society Interface volume 5, issue 25, page 941-953 ISSN 1742-5689 1742-5662 journal-article 2008 crroyalsociety https://doi.org/10.1098/rsif.2007.1325 2024-09-30T04:14:48Z The spotted ratfish Hydrolagus colliei is a holocephalan fish that consumes hard prey (durophagy) but lacks many morphological characters associated with durophagy in other cartilaginous fishes. We investigated its feeding biomechanics and biting performance to determine whether it can generate bite forces comparable with other durophagous elasmobranchs, how biting performance changes over ontogeny (21–44 cm SL) and whether biomechanical modelling can accurately predict feeding performance in holocephalans. Hydrolagus colliei can generate absolute and mass-specific bite forces comparable with other durophagous elasmobranchs (anterior=104 N, posterior=191 N) and has the highest jaw leverage of any cartilaginous fish studied. Modelling indicated that cranial geometry stabilizes the jaw joint by equitably distributing forces throughout the feeding mechanism and that positive allometry of bite force is due to hyperallometric mechanical advantage. However, bite forces measured through tetanic stimulation of the adductor musculature increased isometrically. The jaw adductors of H. colliei fatigued more rapidly than those of the piscivorous spiny dogfish Squalus acanthias as well. The feeding mechanism of H. colliei is a volume-constrained system in which negative allometry of cranial dimensions leaves relatively less room for musculature. Jaw adductor force, however, is maintained through ontogenetic changes in muscle architecture. Article in Journal/Newspaper spiny dogfish Squalus acanthias The Royal Society Journal of The Royal Society Interface 5 25 941 953 |
institution |
Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
The spotted ratfish Hydrolagus colliei is a holocephalan fish that consumes hard prey (durophagy) but lacks many morphological characters associated with durophagy in other cartilaginous fishes. We investigated its feeding biomechanics and biting performance to determine whether it can generate bite forces comparable with other durophagous elasmobranchs, how biting performance changes over ontogeny (21–44 cm SL) and whether biomechanical modelling can accurately predict feeding performance in holocephalans. Hydrolagus colliei can generate absolute and mass-specific bite forces comparable with other durophagous elasmobranchs (anterior=104 N, posterior=191 N) and has the highest jaw leverage of any cartilaginous fish studied. Modelling indicated that cranial geometry stabilizes the jaw joint by equitably distributing forces throughout the feeding mechanism and that positive allometry of bite force is due to hyperallometric mechanical advantage. However, bite forces measured through tetanic stimulation of the adductor musculature increased isometrically. The jaw adductors of H. colliei fatigued more rapidly than those of the piscivorous spiny dogfish Squalus acanthias as well. The feeding mechanism of H. colliei is a volume-constrained system in which negative allometry of cranial dimensions leaves relatively less room for musculature. Jaw adductor force, however, is maintained through ontogenetic changes in muscle architecture. |
format |
Article in Journal/Newspaper |
author |
Huber, Daniel R Dean, Mason N Summers, Adam P |
spellingShingle |
Huber, Daniel R Dean, Mason N Summers, Adam P Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei |
author_facet |
Huber, Daniel R Dean, Mason N Summers, Adam P |
author_sort |
Huber, Daniel R |
title |
Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei |
title_short |
Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei |
title_full |
Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei |
title_fullStr |
Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei |
title_full_unstemmed |
Hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish Hydrolagus colliei |
title_sort |
hard prey, soft jaws and the ontogeny of feeding mechanics in the spotted ratfish hydrolagus colliei |
publisher |
The Royal Society |
publishDate |
2008 |
url |
http://dx.doi.org/10.1098/rsif.2007.1325 https://royalsocietypublishing.org/doi/pdf/10.1098/rsif.2007.1325 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsif.2007.1325 |
genre |
spiny dogfish Squalus acanthias |
genre_facet |
spiny dogfish Squalus acanthias |
op_source |
Journal of The Royal Society Interface volume 5, issue 25, page 941-953 ISSN 1742-5689 1742-5662 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsif.2007.1325 |
container_title |
Journal of The Royal Society Interface |
container_volume |
5 |
container_issue |
25 |
container_start_page |
941 |
op_container_end_page |
953 |
_version_ |
1813453145021349888 |