Evaluating how management policies affect red wolf mortality and disappearance

Area of Science:

• Conservation Biology
• Wildlife Ecology
• Population Dynamics

Background:

• Poaching is a primary threat to large carnivore survival and contributes to global endangerment.
• The 'killing for tolerance' hypothesis suggests reduced protections decrease poaching, but recent evidence points to 'facilitated illegal killing'.
• Red wolves (Canis rufus) are critically endangered, making their conservation a high priority.

Purpose of the Study:

• To evaluate the impact of federal and state policy changes on red wolf mortality and disappearance rates.
• To test the 'facilitated illegal killing' hypothesis against the traditional 'killing for tolerance' hypothesis for red wolves.
• To provide evidence-based recommendations for improving endangered species protection policies.

Main Methods:

• Survival and competing risk models were developed for adult collared red wolves (n = 526) in North Carolina (1987-2020).
• Analysis focused on changes in mortality and disappearance hazards and incidence correlated with policy shifts.
• Statistical models assessed the influence of altered hunting regulations and management phases on red wolf survival.

Main Results:

• Reduced federal and state protections significantly increased the hazard and incidence of reported red wolf poaching.
• Increases in poaching hazard ranged from 85-256%, and incidence from 56-243%, supporting facilitated illegal killing.
• Disappearances also showed smaller increases during periods of reduced protection.

Conclusions:

• Evidence strongly supports the 'facilitated illegal killing' hypothesis for red wolves.
• Current protective policies may inadvertently increase poaching risks for endangered species.
• Enhanced conservation policies and enforcement are crucial to mitigate environmental crimes and protect large carnivores.