Study on the Affinity Relation in Colonies of Brandt‘s Vole Study on the Behavior Forage and Selection for Storage of Forage plants of Brandt’s Vole (Microtus brandti) Before Overwintering Forecast population of Brandt‘‘‘‘s vole by using matrix model STUDY ON SEASONAL SURVIVAL RATES OF THE POPULATIONS OF MICROTVS BRANDTI IN DIFFERENT PERIODS Study on the Bandt’s Vole Populational Production Comparison with the methods for Brandt‘s vole population