Behavioral responses associated with a human-mediated predator shelter

Area of Science:

• Wildlife ecology
• Behavioral ecology
• Conservation biology

Background:

• Human activities in protected areas can mimic predation risk, influencing wildlife behavior.
• Some ungulate species may use areas with high human presence as refuges from predators.

Purpose of the Study:

• To test the predator shelter hypothesis using pronghorn and elk in Grand Teton National Park.
• To investigate if predictable human presence offers a refuge from predatory risk for ungulates.

Main Methods:

• Utilized four years of behavioral activity budget data for pronghorn (Antilocapra americana) and elk (Cervus elephus).
• Conducted daily behavioral scans along two roads with differing traffic volumes (Teton Park Road vs. River Road).

Main Results:

• At the busier Teton Park Road, ungulates showed increased feeding and decreased alert behavior, indicative of reduced predation threat.
• Pronghorn exhibited increased movement at the less-trafficked River Road, consistent with higher perceived predation risk.
• Both species formed smaller groups at the Teton Park Road, a common response to lower predation risk.

Conclusions:

• Findings support the predator shelter hypothesis: ungulates utilize human presence as a refuge from predators.
• Human activity can modify predator-prey interactions, potentially impacting ecosystem function and biodiversity.