Spatial partitioning by a subordinate carnivore is mediated by conspecific overlap

Area of Science:

• Ecology
• Conservation Biology
• Behavioral Ecology

Background:

• Territory size in mammals is influenced by various hypotheses, including resource dispersion, intruder pressure, and intraguild predation.
• Understanding these factors is crucial for managing endangered species like the African wild dog (Lycaon pictus).

Purpose of the Study:

• To test the predictions of the resource dispersion hypothesis (RDH), intruder pressure hypothesis (IPH), and intraguild predation hypothesis (IGPH) on African wild dog territory size.
• To investigate the factors influencing territoriality in African wild dogs in Kruger National Park.

Main Methods:

• Studied 19 packs of African wild dogs over two years in Kruger National Park, South Africa.
• Assessed territory size in relation to resource dispersion, pack size, conspecific and interspecific interactions (lions - Panthera leo).

Main Results:

• The intraguild predation hypothesis (IGPH) was fully supported, indicating larger territories in areas with higher lion density.
• The intruder pressure hypothesis (IPH) was partially supported by findings of increased territory overlap in areas with low resource dispersion.
• The resource dispersion hypothesis (RDH) was partially supported, with evidence of spatial partitioning between wild dogs and lions, influenced by resources and conspecific overlap.

Conclusions:

• Subordinate carnivores, like African wild dogs, must balance competition with dominant species (lions) and conspecifics for successful coexistence.
• Spatial avoidance strategies and resource mediation play key roles in territory dynamics for endangered carnivores.