Prey tracking and predator avoidance in a Neotropical moist forest: a camera-trapping approach

Area of Science:

• Ecology
• Wildlife Biology
• Behavioral Ecology

Background:

• Understanding predator-prey interactions, specifically prey avoidance and predator tracking, is crucial but challenging to measure in wild populations.
• Traditional methods like GPS tracking are invasive and limited to a few individuals.

Purpose of the Study:

• To investigate predator avoidance by prey and prey tracking by predators using a noninvasive camera trapping approach.
• To test if prey animals avoid ocelots (Leopardus pardalis) and if ocelots track prey.

Main Methods:

• Camera traps were deployed at fixed locations on Barro Colorado Island, Panama.
• Parametric survival models analyzed time intervals between camera trap captures of predators and prey.
• Observed intervals were compared to random permutations to assess temporal proximity.

Main Results:

• Prey animals appeared significantly less often after an ocelot passage than expected by chance.
• Ocelots appeared significantly more often after prey passage than expected by chance.
• These temporal patterns provide indirect evidence for prey avoidance and predator tracking.

Conclusions:

• Predator avoidance and prey tracking significantly influence predator and prey distribution in a field setting.
• Camera trapping offers a viable, noninvasive alternative to GPS tracking for studying certain predator-prey dynamics.
• This research advances our understanding of ecological interactions and methodological approaches.