Data from: Divergent in shape and convergent in function: adaptive evolution of the mandible in Sub-Antarctic mice ...

• Main Authors: Renaud, Sabrina, Ledevin, Ronan, Pisanu, Benoît, Chapuis, Jean-Louis, Quillfeldt, Petra, Hardouin, Emilie A.
• Format: Dataset
• Language: English
• Published: Dryad 2018
• Subjects: mouse mandible; Mus musculus domesticus; adaptive convergence; Antarctic; Lever; Antarc*
• Online Access: https://dx.doi.org/10.5061/dryad.1c3k32r; https://datadryad.org/stash/dataset/doi:10.5061/dryad.1c3k32r

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 ... : 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 ...