Recommendations for the management of sarcoptic mange in free–ranging Iberian ibex populations

J. E. Granados,J. Espinosa,F. J. Cano–Manuel,J. M. Pérez,J. R. López–Olvera,A. Baéz–Bravo,R. C. Soriguer,P. Fandos

doi:10.32800/abc.2020.43.0137

Abstract

In recent decades, sarcoptic mange has become the main driver of demographic changes in Iberian ibex (Capra pyrenaica) populations in the Iberian Peninsula. Given this species’ economic and ecological importance, priority must be given to management measures aimed at limiting the effects of this disease. However, despite the wealth of research on sarcoptic mange in ibex, no common patterns of action are yet available to manage this disease under field conditions. The lack of national and international protocols aimed at controlling sarcoptic mange has favoured the spontaneous emergence of various disease management initiatives in Spain. However, very little information is available concerning this trend and what there is tends to be available only as ‘grey literature’ or is consigned to the memory of local observers. Traditional strategies designed to combat this disease include the administration of medicated feed and the non–selective culling of mangy ibex. Here, we propose a management approach that takes into account aspects relating to the ecology and conservation of ibex populations, as well as public–health–related factors. Our recommendations are based on knowledge of the disease and host–parasite interaction, and aim to promote long–term advances in its control. Moreover, we discuss the efficacy of the measures traditionally used in mange management. The overall aim is to encourage debate between wildlife managers and motivate the development of alternative management strategies.

Highlights

Awareness of the importance of actively managing infectious diseases in wild animals is a relatively novel phenomenon
The emergence of virulent forms of infectious agents or highly susceptible hosts may jeopardize the structure of wild populations (Woodroffe, 1999), as occurred in the case of sarcoptic mange caused by the Sarcoptes scabiei mite
In light of the four categories used for the management of wildlife diseases (Wobeser, 1994, 2002; Artois et al, 2001, Artois, 2003), here we propose action that lies halfway between laissez–faire and control, given that prevention and eradication under field conditions is an extremely complex task

Summary

Introduction

Awareness of the importance of actively managing infectious diseases in wild animals is a relatively novel phenomenon. Two good examples of such distortions are the elimination of large predators and the loss of biodiversity (Packer et al, 2003; Keesing et al, 2006) In many zones, this has led to an unsustainable overabundance of wild animals in their chosen habitats, which creates ideal conditions for the flare–up of disease (Rossi et al, 2005; Gortázar et al, 2006; Vicente et al, 2007). The emergence of virulent forms of infectious agents or highly susceptible hosts may jeopardize the structure of wild populations (Woodroffe, 1999), as occurred in the case of sarcoptic mange caused by the Sarcoptes scabiei mite

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