Red kangaroo (Macropus rufus) dynamics: Effects of rainfall, density dependence, harvesting and environmental stochasticity

Abstract

1. Change in the number of red kangaroos (Macropus rufus) in the South Australian pastoral zone is related to rainfall and population size. 2. These relationships are used to assess effects of harvesting red kangaroos by predicting the change in the risk of population decline and explosion under a range of harvesting regimes. The predictions account for the combined influences of rainfall, density dependence and environmental stochasticity. 3. The method illustrates the importance of considering environmental stochasticity when assessing impacts, and how risk assessment may be used to assist wildlife management. Sustainable harvesting rates will be overestimated if environmental stochasticit..