численность

Number of Small Mammals in Fields, Stacks and Ricks in the South of the Central Black-Earth Region

Authors: Trankvilevsky D. V., Kvasov D. A.

The results of studies conducted by the sanitary and epidemiological service in the Voronezh region from 1959 till 2013 were analyzed. Records of small mammals (SM) were carried out by snap traps with wire hooks for baiting. Standard bait (black bread pieces flavored with sunflower oil) was used. Traps were placed in lines. The numbers of SM were calculated as a percentage of animals fallen into 100 traps per day. The data obtained were analyzed using conventional statistical methods, including the method of standard deviations.

Tendencies in the Dynamics of Birds Community in Agricultural Landscapes of the Steppe Trans-Urals at the Turn of the Century

Authors: Korovin V. A.

The dynamics of the bird community in agricultural landscapes of the Trans-Urals steppe from the period of heavy agricultural intensification (1988 - 1992) until the decline of agricultural production (2000 - 2008) is considered. In the conditions of inten-sive agriculture, the agrophytocenosis structure and features of the agricultural cultivation technology serve as the key factors for the differentiation of bird communities in the steppe agricultural landscape.

ABUNDANCE OF TETRAX TETRAX L. 1758 (OTIDIDAE, AVES) IN THE SARATOV REGION

Authors: Oparin M. L., Kondratenkov I. A., Oparina O. S., Mamayev A. B.

Based on the count data obtained by various methods and their statistical processing, the abundance of the autumn population of Tetrax tetrax in the Saratov Trans-Volga region was estimated from the late 1990s till now. From 2012 to 2016 it averaged about 30,000 individuals, and in the Right Volga Bank region it was one or two orders lower, the species’ distribution there was sporadic. When studying the T. tetrax abundance dynamics, an increase in its population on the studied territory in the first half of the 2000s was established.

ASSESSMENT OF THE IMPACT OF MAJOR LIMITING FACTORS ON THE GROWTH OF A VIMBA BREAM POPULATION (VIMBA VIMBA VIMBA) (CYPRINIDAE) - AN INTRODUCED SPECIES IN THE VOLGOGRAD RESERVOIR

Authors: Belyanin I. A., Shashulovsky V. A., Mosiyash S. S.

An attempt was made to estimate the impact of major limiting factors on changes of the vimba population size in the Volgograd reservoir. The vimba population size in the reservoir is already close to its limit by one hypothesis, based on the accessibility of spawning area resources. A 15-fold increase in the vimba population size is possible for at least two decades by another hypothesis, providing for the population restriction by food resources.