Efforts going to the dogs? Evaluating attempts to re-introduce endangered wild dogs in South Africa
Gusset, Markus; Ryan, Sadie J.; Hofmeyr, Markus; Van Dyk, Gus; Davies-Mostert, Harriet T.; Graf, Jan A.; Owen, Cailey; Szykman, Micaela; Macdonald, David W.; Monfort, Steven L.; Wildt, David E.; Maddock, Anthony H.; Mills, Michael G.L. (Gus); Slotow, Robert; Somers, Michael J.
We evaluated one of the most extensive efforts to date to re-introduce an endangered species: attempts to establish an actively managed meta-population of African wild dogs Lycaon pictus in South Africa.
Using an information-theoretic approach, known-fate modelling in program mark was employed to estimate the survival of re-introduced wild dogs and their offspring, and to model covariate effects relative to survival. Multiple a priori hypotheses on correlates of re-introduction success were tested (collated from extensive individual experiences) using different re-introduction attempts as natural quasi experiments.
Survival analyses revealed that the determinants of re-introduction success can be reduced to two factors relevant for management, suggesting that wild dog re-introductions should be attempted with socially integrated animals that are released into securely fenced areas, unless measures are implemented to mitigate human-related mortalities outside protected areas.
Synthesis and application. This study illustrates that monitoring and evaluation of conservation efforts, complimented with expert knowledge, forms the foundation of informed decision-making to underpin management recommendations with scientific evidence, particularly if the proposed actions are controversial.