Morphometric variations at an ecological scale: Seasonal and local variations in feral and commensal house mice |
| |
| Affiliation: | 1. Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne, France;2. Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Christchurch House, Talbot Campus, Poole, Dorset, BH12 5BB, United Kingdom;3. Centre de Biologie et Gestion des Populations (INRA ⁄ IRD ⁄ Cirad ⁄ Montpellier SupAgro), Campus international de Baillarguet, CS 30016, F-34988, Montferrier-sur-Lez Cedex, France;1. Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal;2. Servei d’Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia Animals, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain;3. Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén, Campus Las Lagunillas, Jaén, Spain;4. Agencia de Medio Ambiente y Agua, Isla de la Cartuja, Sevilla, Spain;5. Direcció General de Medi Ambient i Biodiversitat, Depto. de Agricultura, Ramadería, Pesca i Alimentació, Generalitat de Catalunya, Barcelona, Spain;6. Reserva Nacional de Caça dels Ports de Tortosa i Beseit, Roquetes, Tarragona, Spain;7. Institute of Zoology, Zoological Society of London, Regent’s Park, London, United Kingdom;1. South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai Key Laboratory of Marine Bioresource and Environment, School of Marine Sciences, Sun Yat-Sen University, Guangzhou, 510275, PR China;2. The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong;3. Cetacean Ecology Lab, Cetacea Research Institute, Hong Kong;1. Institute of Zoology, National Academy of Sciences of Belarus, Akademicheskaya Street, 27, Minsk 220072, Belarus;2. LIEC—UMR 7360 CNRS, University of Lorraine, Metz, France;3. LISEC EA 2310, Faculté des Sciences du Sport, Strasbourg, France;1. FLEA, Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, HD1 3DH Huddersfield, UK;2. GIEF, Gruppo Italiano per l’Entomologia Forense, Italy;1. Department of Economics and Statistics, University of Siena, P.zza S. Francesco 8, 53100, Siena, Italy;2. Institute for Environmental Protection and Research (ISPRA), Via Ca'' Fornacetta, 9, 40064, Ozzano dell''Emilia, Italy;3. Department of Biology, University of Florence, Via Madonna del Piano 6, 50019, Sesto Fiorentino, Italy |
| |
| Abstract: | The time scales of evolutionary and ecological studies tend to converge, as shown by evidences that contemporary evolution can occur as fast as ecological processes. This opens new questions regarding variation of characters usually considered to change mostly along an evolutionary time scale, such as morphometric traits, including osteological and dental features such as mandibles and teeth of mammals. Using two-dimensional geometric morphometric approach, we questioned whether such features can change on a seasonal and local basis, in relation to the ecological dynamics of the populations. Our model comprised populations of house mice (Mus musculus domesticus) in two contrasted situations in mainland Western Europe: a feral population vs. two close commensal populations. Mitochondrial DNA (D-loop) provided insight into the diversity and dynamics of the populations.The feral population appeared as genetically highly diversified, suggesting a possible functioning as a sink in relation to the surrounding commensal populations. In contrast, commensal populations were highly homogeneous from a genetic point of view, suggesting each population to be isolated. This triggered morphological differentiation between neighboring farms. Seasonal differences in morphometric traits (mandible size and shape and molar size and shape) were significant in both settings, although seasonal variations were greater in the feral than in the commensal population. Seasonal variations in molar size and shape could be attributed to differential wear in young or overwintered populations. Differences in mandible shape could be related to aging in overwintered animals, but also possibly to differing growth conditions depending on the season. The impact of these ecological processes on morphometric traits is moderate compared to divergence over a large biogeographic scale, but their significance nevertheless underlines that even morphological characters may trace populations dynamics at small scale in time and space. |
| |
| Keywords: | Murinae Rodent Geometric morphometrics Mandible Molar shape Phylogeny D-loop |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
