Callum F. Ross
Bite force and cranial bone strain in four species of lizards
Ross, Callum F.; Porro, Laura B.; Herrel, Anthony; Evans, Susan E.; Fagan, Michael J.
Authors
Laura B. Porro
Anthony Herrel
Susan E. Evans
Michael J. Fagan
Abstract
In vivo bone strain data provide direct evidence of strain patterns in the cranium during biting. Compared to mammals, in vivo bone strains in lizard skulls are poorly documented. This paper presents strain data from the skulls of Anolis equestris, Gekko gecko, Iguana iguana and Salvator merianae during transducer biting. Analysis of variance was used to investigate effects of bite force, bite point, diet, cranial morphology and cranial kinesis on strain magnitudes. Within individuals the most consistent determinants of variance in bone strain magnitudes are gage location and bite point, with the importance of bite force varying between individuals. Inter-site variance in strain magnitudes—strain gradient—is present in all individuals, and varies with bite point. Between individuals within species, variance in strain magnitude is driven primarily by variation in bite force, not gage location or bite point, suggesting that inter-individual variation in patterns of strain magnitude is minimal. Between species, variation in strain magnitudes is significantly impacted by bite force and species membership, as well as by interactions between gage location, species, and bite point. Independent of bite force, species differences in cranial strain magnitudes may reflect selection for different cranial morphology in relation to feeding function, but what these performance criteria are is not clear. The relatively low strain magnitudes in Iguana and Uromastyx compared to other lizards may be related to their herbivorous diet. Cranial kinesis and the presence or absence of postorbital and supratemporal bars are not important determinants of inter-specific variation in strain magnitudes.
Citation
Ross, C. F., Porro, L. B., Herrel, A., Evans, S. E., & Fagan, M. J. (2018). Bite force and cranial bone strain in four species of lizards. The journal of experimental biology, 221(23), jeb.180240. https://doi.org/10.1242/jeb.180240
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 16, 2018 |
Online Publication Date | Oct 23, 2018 |
Publication Date | Dec 4, 2018 |
Deposit Date | Nov 5, 2018 |
Publicly Available Date | Oct 24, 2019 |
Journal | The Journal of Experimental Biology |
Print ISSN | 0022-0949 |
Publisher | The Company of Biologists |
Peer Reviewed | Peer Reviewed |
Volume | 221 |
Issue | 23 |
Pages | jeb.180240 |
DOI | https://doi.org/10.1242/jeb.180240 |
Keywords | Insect Science; Animal Science and Zoology; Aquatic Science; Physiology; Ecology, Evolution, Behavior and Systematics; Molecular Biology |
Public URL | https://hull-repository.worktribe.com/output/1144570 |
Publisher URL | http://jeb.biologists.org/content/early/2018/10/22/jeb.180240 |
Contract Date | Nov 5, 2018 |
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©2018 The authors
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