Izvestiya of Saratov University.
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

американская норка

Особенности питания, основные и замещающие корма в рационе американской норки (NEOVISON VISON SCHREBER, 1777) на территории приволжских венцов

Проведена оценка компонентов питания американской норки
(Neovison vison Schreber, 1777) на территории Приволжских вен-
цов в период с 2005 по 2011 гг. Для комплексного описания были
задействованы критерий встречаемости (В, %) и биомасса (Б, %).
Установлены основные и замещающие корма в рационе хищника,
проведен расчет трофической ниши и степень ее перекрывания
в различные годы.

Seasonal dynamics Individual Plot Sizes of Males and Females of the American Mink (Neovison vison Schreber, 1777) in the Saratov Region

The estimation size of individual plots the American mink on the res- ervoirs in Saratov region in the period from 2000 to 2014. The average plot size of males – 30.6 hectares, females – 27.8 hectares. During the cold period on most waters plot sizes are increased almost two- fold. Found that females go farther from the center of the rivers and streams than males (females – 203.8 m; males – 166.7 m). American mink is more inclined to the rivers with wide floodplain (?2 = 26.2; p = 0.01).

Seasonal Dynamics of Nutrition American Mink (Neovison Vison Schreber, 1777) in the Coastal Zone River B. Irgiz

Spend seasonal estimation diet of American mink on the river B. Irgiz between 2000 and 2011. The basis of nutrition predator: spring – amphibians (24.5% BIO), crayfish (43.1% BIO), mammals (21.3% BIO); summer – fish (29.3% BIO), amphibians (22.6% BIO), mammals (13.3% BIO); autumn – amphibians (43.3% BIO), fish (15.5% BIO), mammals (11.8% BIO); winter – fish (30.8% BIO); mammals (30.1% BIO). The regularities of changes in the composition of the diet in the conditions of anthropogenic load.

Habitat Types of American Mink (Neovison Vison Schreber, 1777) on for Example of Northern Lower Volga

Objective of the study – to identify biotopical American mink in the north of the Lower Volga region and conduct its ranking analyzed the predator population density in model habitats. We used the methods of accounting the route trail mapping and detection of sites with use GPS-navigator. Calculation animals identified on individual sites using camera traps, as well as classical methods of estimation of population density of predatory mammals. Statistical analysis was performed using cluster analysis.