La Marmotta alpina Marmota m. marmota (Linné, 1758) nella Regione Friuli-Venezia Guilia.

Résumé

The Author makes a synthesis of the distribution of the alpine marmot Marmota m. marmota (L., 1758) in the extreme north eastern Italy (Friuli-Venezia Giulia region). The present occurrence of the ground-dwelling Sciuridae in this area is entirely due to various reintroduction projects of italian, austrian and jugoslavian organizations and at it may be surely considered very appreciable particularly in the north west of the Camic Alp mountain chain. The species had been also widely spread in Julian Alps and in Julian and Carnic Prealps, but in these areas there are only scattered and fragmented populations which few possibilities of interpopulational conact. This is due to the particular orography and climate of these mountain chain, which are quite low and cut by a lot of deep valleys. In these environmental situations it is very important to continue the reintroduction - or restocking - activities for ecological reasons as well as for conservational purposes, but these operations must follow precise objectives. These must be summarized as follow: I - It may be selected only rocky herbaceous areas before the local upper trees line with a minimal extension of 300 hectares. II -In this area the better period of the year for these operations is the half of may.III - The release of 20 specimens in a locality is the minimum objective for a single reintroduction.