Abstract
One of the most important structures for an individual’s survival is a refuge, especially for species subject to significant predatory pressure or living in environments affected by severe climatic conditions. We studied how wood mice (Apodemus sylvaticus), inhabiting a Mediterranean environment, use nests and the factors that could be determining this use. Radio-tracking of 16 mice allowed us to detect 24 diurnal nests, which were used with a high fidelity rate (1.75 nests/animal). Nest sites that had been identified using radio-tracking were matched with 24 randomly selected non-nest sites (located within an area defined by the sum of all individual home ranges), and all sites were characterized according to their macro- and micro-habitat parameters. Using a generalized linear model, we tested three hypotheses: (1) a nest’s use is influenced by its proximity to food patches; (2) the degree of sheltering provided by each site influences its use; and (3) nest use is constrained by a combination of food- and shelter-related features. Females had higher nest fidelity than males, and the degree of sheltering provided by each site had a positive significant influence on its use. Nests offering higher protection (e.g., under thick vegetation), good drainage (e.g., sleep slopes), and lower human and predatory disturbance (far from orchards) were most often used. The proximity to food patches seemed to negatively influence nest use. Results indicate the need to preserve patches of natural dense vegetation near riparian habitats, which is in agreement with the focus of mammalian protection plans in Mediterranean agricultural landscapes. These patches are important areas for Apodemus sylvaticus, an acorn disperser species, which is preyed on by raptors and mammalian carnivores.
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Acknowledgments
The study was funded by the Fundação para a Ciência e a Tecnologia and Fundo Social Europeu (III Quadro Comunitário de Apoio) (Research Contract POCI and PPCDT/BIA-BDE-61122/2004; LMR Postdoctoral fellowship: SFRH/BPD/14435/2003 and SFRH/BPD/35842/2007). Special thanks are due to Carla Gheler-Costa for the help in the trapping campaign, Maria J. Santos for the comments on an early draft, and Sarah Perkins for manuscript revision.
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Rosalino, L.M., Ferreira, D., Leitão, I. et al. Selection of nest sites by wood mice Apodemus sylvaticus in a Mediterranean agro-forest landscape. Ecol Res 26, 445–452 (2011). https://doi.org/10.1007/s11284-010-0797-9
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DOI: https://doi.org/10.1007/s11284-010-0797-9