A numerical response of wolves to bison abundance in Wood Buffalo National Park, Canada

摘要: The numerical response of predators to changing prey density is an important component predator-prey dynamics. We examined factors influencing two indices wolf (Canis lupus) abundance in Wood Buffalo National Park, Canada: historical pelt harvests from 1970 1988 and sightings wolves by park staff on survey flights 1973 1991. tested the effect price (adjusted 1986-equivalent Canadian dollars), number trappers, bison (Bison bison) population size returns for 18-year period using a multiple linear regression model. then relationship between overlapping 19-year period. Wolf was significant determinant harvest, whereas numbers or trappers were not predictors harvest. However, there size. This analysis suggests that correlat...