Feeding behavior and the state of populations of Ciscaucasian hamster (Mesocricetus raddei avaricus) in mountain agroecosystems [Russian Federation]

animal migration animal population feed intake feeding level grain granos hamster hamsters highlands migration animale mortalidad mortalite mortality niveau d'alimentation nivel alimenticio performance de reproduction population animale population density prise alimentaire (animaux) reproductive performance reproductividad russian federation seasonal variation