POPULATION OF SMALL MAMMALS ON SHOKALSKY ISLAND (THE KARA SEA)

摘要

The number of small mammals was registered using traps and pitfalls on Shokalsky Island (72 degrees 55' N, 74 degrees 20' E) during 20 days in August 2014. A total of 157 skulls from pomarine skua (Stercorarius pomarinus) pellets were examined. Only Siberian lemming (Lemmus sibiricus Kerr 1792) was identified. Trapping cylinders were used for the work in river valleys and flat interfluves. According to these data, the total number and large proportion of young non-breeding males were higher in the river valleys. The same habitats and drift-woods at the valley wall were investigated using break-back traps. Juvenile individuals were not found using this technique. The population structure in the river valleys was similar to that in the flat interfluve. In the drift-woods compared to the other habitats, the number of small mammals was 2 times higher, and the proportion of breeding females was greater.