Data and Code for: Does predation risk constrain behavior in prey species? A test with five species of Neotropical forest mammals

We also tested whether temporal overlap between prey competitor species differed between island and mainland populations. Overall, we found that activity levels during risky times were higher on islands than on the mainland for two species of agouti and the White-faced Capuchin monkey. Island prey populations showed far less anti-predator behavior and more foraging behavior than their mainland counterparts.

They did not, however, show higher levels of nocturnal activity during darker nights nor longer visits, both considered as indicative of predation release. We also found lower spatiotemporal overlap between the white-faced capuchins and the mantled howler monkeys on islands than their counterparts on the mainland. This result suggests that when predation pressure is relaxed, there is a decrease in direct competitive interactions between these species, which may also be associated with changes in the use of forest strata.

These findings provide partial support for the hypothesis that predation risk constrains activity patterns and influences spatiotemporal niche differentiation among competing mammalian prey species.