Censo y distribucion de la marmota alpina (Marmota marmota) en Navarra [Dénombrment et répartition de la marmotte alpine (Marmota marmota) en Navarre] .

Résumé

Census and distribution of the alpine marmot (Marmota marmota) in Navarre. The Alpine marmot (Marmota marmota) is a species from the Alps and the Tatra mountains, which has been taken from the Alps and introduced in to the French Pyrenees from 1948 until the eighties. Nowadays it can be found broadly scattered over both sides of the Pyrenean chain and occupying supra-forestal pastures, for the most part, above 1800 m. In 1994, a study was carried out in order to ascertain the distribution and population census of the species in Navarre, its westernmost area of distribution. The supra-forestal sub-alpine and montane pastures of the High Roncal Valley, on the borders of Aragon and France, were prospected in July. During the first week of August, a census of ten family units was carried out. The results indicate that marmots have established about thirty colonies in Navarre, which occupy supra-forestal pastures and forest clearings. the settlements are mainly made p of single family colonies of an average size similar to that observed in the Alps for the same species.