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With the use of statistical methods it is possible to forecast the extent of damage in farm crops done by big game (red deer and wild boars). Mathematical model for a definite number of animals in definite ecological environment and on definite area was solved with the aid of multiple regression analysis. Studies, carried out during years 1973-1975, included 23 lowland forest districts situated within the Silesian Land. Data collected in each forest district concered the size of animal populations, information on environmental characters related with their behaviour, as well as the area and value of damage inflicted in farm crops. There were obtained regression equations illustrating economic and ecological aspects of the situation prevailing in hunting grounds.

Comparative accuracy of population estimators for enclosed small mammal populations