10.5061/DRYAD.1C3K32R
Renaud, Sabrina
University of Lyon System
Ledevin, Ronan
University of Bordeaux
University of Lyon System
Pisanu, BenoƮt
Sorbonne University
Chapuis, Jean-Louis
Sorbonne University
Quillfeldt, Petra
Bournemouth University
Hardouin, Emilie A.
Bournemouth University
Data from: Divergent in shape and convergent in function: adaptive
evolution of the mandible in Sub-Antarctic mice
Dryad
dataset
2018
mouse mandible
Mus musculus domesticus
adaptive convergence
2018-02-28T14:23:35Z
2018-02-28T14:23:35Z
en
https://doi.org/10.1111/evo.13467
154624 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Convergent evolution in similar environments constitutes strong evidence
of adaptive evolution. Transported with people around the world, house
mice colonized even remote areas, such as Sub-Antarctic islands. There,
they returned to a feral way of life, shifting towards a diet enriched in
terrestrial macroinvertebrates. Here, we test the hypothesis that this
triggered convergent evolution of the mandible, a morphological character
involved in food consumption. Mandible shape from four Sub-Antarctic
islands was compared to phylogeny, tracing the history of colonization,
and climatic conditions. Mandible shape was primarily influenced by
phylogenetic history, thus discarding the hypothesis of convergent
evolution. The biomechanical properties of the jaw were then investigated.
Incisor in-lever and temporalis out-lever suggested an increase in the
velocity of incisor biting, in agreement with observations on various
carnivorous and insectivorous rodents. The mechanical advantage related to
incisor biting also revealed an increased functional performance in
Sub-Antarctic populations, and appears to be an adaptation to catch prey
more efficiently. The amount of change involved was larger than expected
for a plastic response, suggesting microevolutionary processes were
evolved. This study thus denotes some degree of adaptive convergent
evolution related to changes in habitat-related changes in dietary items
in Sub-Antarctic mice, but only regarding simple, functionally relevant
aspects of mandible morphology.
Mandible descriptors and PCs for comparisonSheet 1: Mandible area and
Fourier coefficients from A0 to B7 describing size and shape of the
mandible. Sheet 2: Mechanical advantages (MAs) and axes for comparisons:
PCclimate, PC for D-loop analysis, and PC for mitochondrial
analysis.Md_FCs_MAs_PCs.xls