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Functional correlates of skull shape in Chiroptera: feeding and echolocation adaptations.

Giacomini, G, Herrel, A, Chaverri, G, Brown, RP, Russo, D, Scaravelli, D and Meloro, C Functional correlates of skull shape in Chiroptera: feeding and echolocation adaptations. Integrated Zoology. ISSN 1749-4877 (Accepted)

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Abstract

Morphological, functional and behavioural adaptations of bats are among the most diverse within mammals. A strong association between bat skull morphology and feeding behaviour has been suggested previously. However, morphological variation related to other drivers of adaptation, in particular echolocation, remains understudied. We assessed variation in skull morphology with respect to ecology (diet and emission type) and function (bite force, masticatory muscles and echolocation characteristics) using geometric morphometrics and comparative methods. Our study suggests that variation in skull shape of 10 bat families is the result of adaptations to broad dietary categories and sound emission types (oral or nasal). Skull shape correlates with echolocation parameters only in a subsample of insectivorous species, possibly because they (almost) entirely rely on this sensory system for locating and capturing prey. Insectivores emitting low frequencies are characterised by a ventrally tilted rostrum, a trait not associated with feeding parameters. This result questions the validity of a trade-off between feeding and echolocation function. Our study advances understanding of the relationship between skull morphology and specific features of echolocation and suggests that evolutionary constraints due to echolocation may differ between different groups within the Chiroptera.

Item Type: Article
Uncontrolled Keywords: 0608 Zoology
Subjects: Q Science > QL Zoology
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: Wiley
Related URLs:
Date Deposited: 09 Jun 2021 09:11
Last Modified: 09 Jun 2021 09:15
DOI or Identification number: 10.1111/1749-4877.12564
URI: https://researchonline.ljmu.ac.uk/id/eprint/15121

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