Resource partitioning among cape foxes, bat-eared foxes, and black-backed jackals in South Africa
Wednesday, 1st August 2012
Kamler, J.F., Stenkewitz U., Klare U., Jacobsen N.F., Macdonald D.W. (2012)
The Journal of Wildlife Management, Volume 76, Issue 6, 2012.
Cape foxes (Vulpes chama) and bat-eared foxes (Otocyon megalotis) are sympatric with black-backed jackals (Canis mesomelas) over much of southern Africa, although competition with and/or predation by jackals may suppress local populations of both fox species. From 2005 to 2008, we captured, radio-collared, and monitored 11 cape foxes, 22 bat-eared foxes, and 15 black-backed jackals on a game ranch in South Africa to investigate their spatial, habitat, temporal, and dietary resource overlap.
Mean annual home-range sizes were 27.7 km2 for cape foxes, 5.0 km2 for bat-eared foxes, and 17.8 km2 for jackal family groups. Home ranges overlapped completely between species, although core areas overlapped less (
We conclude that bat-eared foxes coexisted with jackals primarily by their dietary specialization and group living. Cape foxes coexisted with jackals by exhibiting high levels of spatial, habitat, temporal, and dietary partitioning. Surprisingly, the fox species exhibited positive associations with each other. Our results show the mechanisms that may allow jackals to suppress fox populations, yet also show how foxes, in turn, use different mechanisms to coexist with a dominant canid. ß 2012 The Wildlife Society.