| [a dynamic study of the count of a commercial muskrat population (ondatra zibethica: mammalia) in a simulation model]. | density-dependent mechanisms of muskrat numbers regulation in karakalpakstan were investigated by mathematical imitation model. the behaviour of model and native population is quite similar. the upper limit for optimum level of density under given conditions is determined by exogenous factors. within population mechanisms lead the density and population structure to the level suitable for given conditions. | 2006 | 8967163 |