Spatial ecology of translocated raccoons

Area of Science:

• Wildlife Ecology
• Disease Ecology
• Conservation Biology

Background:

• Raccoon translocation is a common practice for human-wildlife conflict mitigation.
• Translocation has been implicated in the spread of rabies virus across North America.
• Understanding raccoon movement post-translocation is critical for disease transmission modeling.

Purpose of the Study:

• To investigate the spatial ecology and movement behavior of raccoons after experimental translocation.
• To quantify changes in home range size and movement patterns following translocation.
• To assess the potential impact of translocation on disease transmission dynamics.

Main Methods:

• Reciprocal translocation of 30 raccoons over 16 km between high (bottomland hardwood) and low (upland pine) density habitats.
• Utilized GPS collars to track raccoon movements and estimate 95% utilization distributions (UDs).
• Compared pre- and post-translocation space use, home range sizes, and movement distances.

Main Results:

• Translocated raccoons showed a 13-fold increase in 95% UD post-translocation.
• Raccoons from upland pine habitats exhibited greater space use and movement than those from bottomland hardwood habitats.
• Male raccoons had larger home ranges than females, unaffected by translocation; most animals established new ranges, some returning to original sites or crossing rivers.

Conclusions:

• Raccoon translocation dramatically alters spatial ecology, increasing potential for disease spread.
• Habitat type influences post-translocation movement, with upland pine origin animals showing greater dispersal.
• Discouraging mesocarnivore translocation is recommended to mitigate wildlife rabies outbreaks.