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Author |
Renaud S., Delépine C., Ledevin R., Pisanu B., Quéré J.-P., Hardouin E.A. |
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Title |
A sharp incisor tool for predator house mice back to the wild |
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Journal |
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Year  |
2019 |
Publication |
Journal of zoological systematics and evolutionary research |
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Volume |
57 |
Issue |
4 |
Pages |
989-999 |
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Keywords |
adaptation, biting, functional morphology, geometric morphometrics, Mus musculus domesticus |
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Abstract |
The house mouse (Mus musculus domesticus), as a successful invasive species worldwide, has to forage a variety of resources. Subantarctic mice display among the most notable diet shift from the usual omnivorous–granivorous diet, relying on a larger proportion of terrestrial animal prey. In agreement, a recent study of their mandible morphology evidenced an evolution of their mandible shape to optimize incisor biting and hence seize preys. Here, the incisors themselves are the focus of a morphometric analysis combined with a 3D study of their internal structure, aiming at a comparison between subantarctic populations (Guillou island, Kerguelen archipelago) with a range of western European continental, commensal mice. The predatory foraging behavior of Guillou mice was indeed associated with a sharper bevel of the lower incisor, which appears as an efficient morphology for piercing prey. The incisor of these mice also displays a reduced pulp cavity, suggesting slower eruption counterbalancing a reduced abrasion on such soft food material. The dynamics of the ever‐growing incisor may thus allow adaptive incisor sculpting and participate to the success of mice in foraging diverse resources. |
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Programme |
136 |
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Thesis |
Bachelor's thesis |
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ISSN |
1439-0469 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7456 |
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