DYNAMICS OF THE NUMBER AND COMMUNITY STRUCTURE OF SHREWS IN THE SURROUNDINGS OF MAGADAN (NORTHERN COAST OF THE SEA OF OKHOTSK)
S. V. KISELEV
Institute of Biological Problems of the North of FEB RAS, Magadan, Russia
Keywords: Soricidae, Sorex, dominance structure, population dynamics, Northern Priokhotye, Northeast Asia
Abstract
Data on the population dynamics and dominance structure in the community of shrews in the surroundings of Magadan (2011-2018) are represented. In general, the even-toothed shrew (S. isodon) and the Laxmann’s shrew (S. caecutiens) dominated in the catch; species of secondary abundance were the slender shrew (S. gracillimus), the Siberian large-toothed shrew (S. daphaenodon), the Kamchatka shrew (S. camtschaticus) and the least shrew (S. minutissimus). Increases and decreases of number of all species coincided to varying degrees, and the differences in the dominance structure between years were relatively small. Only the status of the Laxmann’s shrew, characterized by the largest amplitude of number fluctuations, and the slender shrew, the abundance of which has increased recently in the region, has varied. The role of some factors in the regulation of the number of animals is discussed.
|