Work

Feeding mode drives mandibular shape in extant Delphinidae

Year: 2024

Type: article

Abstract: Delphinidae is the most diverse family within the toothed whale clade, displaying two biosonar modes, different feeding strategies, and diving and habitat adaptations. This work examines the delphinid mandible to determine the association between shape, size and ecological variables in extant species. Geometric morphometric analysis on 95 mandibles belonging to 30 (out of 38) extant species, representatives of all 17 extant genera, was performed in occlusal (or dorsal) and lateral (or labial) view. The results reveal that feeding mode and climate primarily drive mandibular shape in extant species. Biosonar mode is an evolutionary driver in mandibular shape in occlusal view, while diet and maximum prey size play a significant role in size only in both views. By contrast, Diving Ecology, Superficial Temperature and Rostral index do not play a significant role in driving delphinid mandibular shape and size.

Source: Journal of Zoology

DOI: 10.1111/jzo.13214

Authors: D. Vicari, G. Boccone, L. Pandolfi

Institutions: Liverpool John Moores University, University of Pisa, University of Basilicata

Language: English

Topic: Morphological variations and asymmetry

Subfield: Geometry and Topology

Field: Mathematics

Domain: Physical Sciences

SDG: Life below water

Open Access status: hybrid

Estimated APC paid: $4,220