Reserves can threaten wildlife by attracting poachers

If you think there's no question that reserves are great for wildlife, think again. Spain's Donana National Park is such a draw to poachers that there are fewer badgers just inside the reserve than in the area just outside it, according to new research in the February issue of Conservation Biology.

"The story of badger conservation in Donana is probably a very good example of what is going on with many other species and in most protected areas," says author Eloy Revilla, then of the Consejo Superior de Investigaciones Cientificas in Seville, Spain, and now of the UFZ Centre for Environmental Research in Leipzig, Germany.

The problem is that although European reserves are nominally protected from hunting, the abundance of fearless game (deer and wild boars) attracts poachers who also kill non-game species incidentally. This could devastate badgers and other carnivores because they require large habitats and live at low densities. However, little is known about the net effect of reserves on carnivore conservation.

To learn how reserves affect the Eurasian badger, Revilla and his colleagues studied a population living in and around the 200-square mile Donana National Park in southwestern Spain. Because it lies between Europe and Africa, and between the Atlantic Ocean and the Mediterranean Sea, Donana is one of the most biologically diverse reserves in Europe. The badgers, which weigh about 15 pounds and are nocturnal, are thought to be declining in the Mediterranean region.

Revilla and his colleagues studied the rates and causes of death in two groups of badgers in the reserve: one near the edge and one near the core. The researchers estimated badger abundance at the edge, core and just outside of reserve based on a 1992-1993 survey of carnivore tracks in the Donana region. The researchers monitored deaths in 33 radio-tagged badgers from both the "edge" and "core" groups, as well as of untagged badgers both in and ju

Contact: Eloy Revilla
Society for Conservation Biology

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