Evaluation of lion (Panthera leo) scat as a wild dog (Lycaon pictus) deterrent on game farms

Abstract

Context. The conservation of the Endangered African wild dog (Lycaon pictus) poses a major challenge to conservationists because outside the boundaries of protected areas, wild dogs are prone to conflict with farmers. Mitigation measures appropriate for game farmers are scarce, leaving them with limited options to reduce wild dog impact. As a result, targeted persecution is a common occurrence. However, wild dogs are subject to intraguild competition with dominant competitors, often resulting in their suppression and spatial displacement. Therefore, olfactory cues of lion presence may trigger an adverse reaction in wild dogs, and could be a means to manage wild dog movements across the landscape to prevent conflict with farmers. Aim. We aimed to evaluate whether wild dogs can be deterred by simulating lion presence. Methods. By using translocated scent cues in the form of lion scat deployed along the perimeter of plots, lion presence was simulated on game farms where lions were absent. The rate and duration of incursions by wild dogs, collared with GPS trackers, into control and treatment plots ('group') were evaluated. Key results. Wild dog incursion rate dropped by 55.5%, and duration of incursion events dropped by 72.7%, after lion scat was deposited. Control and treatment plots were equally affected with no significant effect of the grouping on wild dog movement. The magnitude of the treatment effect differed between packs. Conclusion. The significant decline of wild dog movement after implementation of treatment suggests a deterrence effect. The insignificant effect of group on wild dog movement indicates large-scale avoidance triggered by a change in the wild dogs' risk perception across the landscape following treatment. The fact that the magnitude of the treatment effect differed between packs indicates that the response to predator cues is likely to be context-dependent. Implications. The findings present a novel approach to managing free-roaming wild dogs by utilising biologically relevant cues, which may benefit wild dog conservation. There is a need for further research to develop the emerging field of scent studies to provide non-lethal solutions and progress towards evidence-based large carnivore management practices.