Effectif des marmottes àtête noire Marmota camtschatica Pall.) en Yakoutie. Number of the black-capped marmot Marmota camschatica Pall.) in Yakutia.

Résumé

In 1950s the number of black- capped marmot was being estimated as 80.000 individuals in the Northern-Eastern Yakutian mountains. The density of their population was characterized by a mean value which is equal to 25 individuals on 100 km2 of relative natural territory (Kapitonov, 1978). The received results of investigations show that M. Camschatica populations density is very low now- 9 individuals on 100 km2. These data are evidence of the fact that only about 30.000 marmots dwell in Northern-Eastern Yakutia. The marmot number is no more than several hundreds in Southern Yakutia. So it turned out that the present number of black-capped marmot is lower for 2, 3 times on the whole than it had been named to be 4 decades ago. The species number lowering is to be observed almost everywhere. It is evidence of obvious degradation of black-capped marmot Yakutian population.