Ecologie d'une population de Crocidura russula en milieu rural montagnard (Insectivora, Soricidae)

Détails

ID Serval
serval:BIB_0E086B3340BD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Ecologie d'une population de Crocidura russula en milieu rural montagnard (Insectivora, Soricidae)
Périodique
La Terre et la Vie
Auteur(s)
Genoud M., Hausser J.
ISSN
0040-3865
Statut éditorial
Publié
Date de publication
1979
Volume
33
Numéro
4
Pages
539-554
Langue
français
Résumé
Crocidura russula is restricted to the vicinity of human dwellings in the northern parts of its range and in the mountain regions of Central and Western Europe. In order to better understand the causes of such a distribution, a population was studied in a rural mountain habitat (750 m above sea level), where the species was found almost exclusively in the neighbourhood of human dwellings. The study was conducted on a 2000 m2 area, over a period of 20 months, by live-trapping and radioactive tracking. The abundance, the local distribution and the behaviour of the shrews vary greatly throughout the year. In summer, they chiefly inhabit areas with a dense herbaceous cover or shruby vegetation; they are mainly active at ground level, in the litter. In autumn, changes in the environmental conditions (lowering of temperatures, subsidence of the herbaceous vegetation, presence of snow) create important energetic problems. At that time, the shrews gradually become more active around and inside compost-heaps and buildings. The microclimate of such environments is mild and prey are numerous. The winter population is reduced (reaching its lowest level in late winter) and consists only of shrews frequenting these sites.
The observed spatial distribution is the result of the energetic dependence of the wintering shrews on human dwellings and their surroundings. This dependence is probably related to the physiological characteristics of the species. In the prospected region, Crocidura russula is the only shrew which regularly takes advantage of man-made habitats; the maintenance of the species in the rural mountain enviroment is probably favoured by the social organization of the populations in winter. The other native Soricids are observed only occasionaly int he neighbourhood of human dwellings.
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Création de la notice
24/01/2008 20:02
Dernière modification de la notice
03/03/2018 13:41
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