Masticatory muscle architectural correlates of dietary diversity in Canidae, Ursidae, and across the order Carnivora
| Autor: | Ashley R. Deutsch, Nikole Worden, Edwin Dickinson, Adam Hartstone-Rose, Gabrielle A Hirschkorn |
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| Rok vydání: | 2021 |
| Předmět: |
Felidae
Histology biology Lineage (evolution) Carnivora Context (language use) Fascicle biology.organism_classification Musteloidea Masticatory force Diet Bite force quotient Taxon Evolutionary biology Masticatory Muscles Animals Humans Allometry Anatomy Ecology Evolution Behavior and Systematics Ursidae Biotechnology Canidae |
| Zdroj: | Anatomical record (Hoboken, N.J. : 2007)REFERENCES. 305(2) |
| ISSN: | 1932-8494 |
| Popis: | Carnivorans represent extreme ecomorphological diversity, encompassing remarkable variation in form, habitat, and diet. The relationship between the masticatory musculature and dietary ecology has been explored in a number of carnivoran lineages, including felids and the superfamily Musteloidea. In this study, we present novel architectural data on two additional carnivoran families - Ursidae and Canidae - and supplement these previous studies with additional felid, musteloid, herpestid, hyaenid, and viverrid taxa (a total of 53 species across 10 families). Gross dissection data were collected following a standardized protocol - sharp dissection followed by chemical digestion. Summed jaw adductor forces were also transformed into bite force estimates (BF) using osteologically-calculated leverages. All data were linearized, log-transformed, and size-adjusted using two proxies for each taxon - body mass and cranial geometric mean - to assess relative scaling trends. These architectural data were then analyzed in the context of dietary ecology to examine the impact of dietary size and dietary mechanical properties. Muscle mass, physiological cross-sectional area and BF scaled with isometry or positive allometry in all cases, whereas fascicle lengths scaled with isometry or negative allometry. With respect to diet, body mass adjusted fascicle lengths were strongly correlated with dietary size in musteloids, but not in any other lineage. The relationship between size-adjusted BF and dietary mechanical properties was also significant within musteloids, and across the sample as a whole, but not within other individual lineages. This interfamilial trend may reflect the increased morphological and dietary diversity of musteloids relative to other carnivoran groups. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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