Recherche d’un indicateur de la cinétique démographique des populations du Campagnol des champs (Microtus arvalis)
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1990
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Sujets proches
Vole, Common Common vole Microtus arvalis Topillos campesinos Campagnol commun Microtus arvalisCiter ce document
Pierre Delattre et al., « Recherche d’un indicateur de la cinétique démographique des populations du Campagnol des champs (Microtus arvalis) », Revue d'Écologie (La Terre et La Vie) (documents), ID : 10.3406/revec.1990.2013
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Résumé
The difficulty of monitoring population densities of the Common Vole (Microtus arvalis) on a regional scale led the authors to test the validity of some density indices based on tracks of this animal, such as burrows’ openings, runways, and droppings. The results were compared with density estimates based on line trapping of voles in the same habitats. The correlations between the number of captures in trap line and the number of burrows’ openings or runways were weak or nil, whereas the correlation with the number of droppings was strong (Table II). Dropping counts may therefore be used to monitor population fluctuations of the Common Vole over large areas (ca . 1 000 ha), provided due attention be given, (1) to habitat heterogeneity, and (2) to vegetation height in grassy areas. At a regional scale a stratified sampling of the habitats is mandatory.
