title: Phylogeny and adaptation shape the teeth of insular mice.
abstract: By accompanying human travels since prehistorical times, the house mouse dispersed widely throughout the world, and colonized many islands. The origin of the travellers determined the phylogenetic source of the insular mice, which encountered diverse ecological and environmental conditions on the various islands. Insular mice are thus an exceptional model to disentangle the relative role of phylogeny, ecology and climate in evolution. Molar shape is known to vary according to phylogeny and to respond to adaptation. Using for the first time a three-dimensional geometric morphometric approach, compared with a classical two-dimensional quantification, the relative effects of size variation, phylogeny, climate and ecology were investigated on molar shape diversity across a variety of islands. Phylogeny emerged as the factor of prime importance in shaping the molar. Changes in competition level, mostly driven by the presence or absence of the wood mouse on the different islands, appeared as the second most important effect. Climate and size differences accounted for slight shape variation. This evidences a balanced role of random differentiation related to history of colonization, and of adaptation possibly related to resource exploitation.
authors: Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Campus de la Doua, Villeurbanne 69622, France.
authors: Ronan
authors: R
authors: Ledevin
authors: Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Campus de la Doua, Villeurbanne 69622, France.
authors: Pascale
authors: P
authors: Chevret
authors: Institut des Sciences de l'Evolution de Montpellier, UMR 5554, Université Montpellier, CNRS, IRD, EPHE, Montpellier 34095, France.
authors: Guila
authors: G
authors: Ganem
authors: Institut des Sciences de l'Evolution de Montpellier, UMR 5554, Université Montpellier, CNRS, IRD, EPHE, Montpellier 34095, France.
authors: Janice
authors: J
authors: Britton-Davidian
authors: Faculty of Sciences and Technology, Bournemouth University, Christchurch House, Talbot Campus, Poole, Dorset BH12 5BB, UK.
authors: Emilie A
authors: EA
authors: Hardouin
authors: Centre d'Ecologie et des Sciences de la Conservation, UMR 7204, Muséum National d'Histoire, Naturelle, 61 rue Buffon, Paris 75005, France.
authors: Jean-Louis
authors: JL
authors: Chapuis
authors: Centre d'Ecologie et des Sciences de la Conservation, UMR 7204, Muséum National d'Histoire, Naturelle, 61 rue Buffon, Paris 75005, France.
authors: Benoit
authors: B
authors: Pisanu
authors: Centro de Estudos do Ambiente e Mar and Departamento de Biologia Animal, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Lisboa 1749-016, Portugal.
authors: Maria
authors: M
authors: da Luz Mathias
authors: Anthropologie, Medizinische Fakultät der Albert Ludwigs, Universität Freiburg, Freiburg 79104, Germany.
authors: Stefan
authors: S
authors: Schlager
authors: Institut des Sciences de l'Evolution de Montpellier, UMR 5554, Université Montpellier, CNRS, IRD, EPHE, Montpellier 34095, France.
authors: Jean-Christophe
authors: JC
authors: Auffray
authors: Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Campus de la Doua, Villeurbanne 69622, France sabrina.renaud@univ-lyon1.fr.
authors: Sabrina
authors: S
authors: Renaud
mesh_terms: D063147:Animal Distribution; D000818:Animals; D001266:Atlantic Islands; D005075:Biological Evolution; D004272:DNA, Mitochondrial / Q000235:genetics; D005060:Europe; D005260:Female; D007195:Indian Ocean Islands; D008297:Male; D051379:Mice / Q000033:anatomy & histology* / Q000145:classification / Q000235:genetics / Q000502:physiology*; D008963:Molar / Q000033:anatomy & histology*; D010802:Phylogeny; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial
keywords: Mus musculus domesticus; first upper molar; house mouse; insular evolution; three-dimensional geometric morphometrics