Authors: Elizabeth Jenkins
Mentors: Jerry Johnson
Insitution: Brigham Young University
There is convincing data on the potential relationship between predator-prey environments and cognitive abilities. There is often an increase in cognition found in species living among predators. Culum Brown and Victoria A. Braithwaite (2005) conducted an experiment to test this hypothesis on Brachyraphis episcopi. While they anticipated their results would support this hypothesis, the populations under non-predator conditions solved the cognitive tests more quickly. In this study, I replicate their experiment with a different species, named Brachyraphis rhabdophora, to determine if their results are repeatable. Populations of Brachyrhaphis rhabdophora are found in northwestern Costa Rica and are distinctly segregated into different river drainages. In each drainage, the populations are isolated into predator and non-predator populations. These populations experience a parallel separation of social environment to the populations used by Brown and Braithwaite. Using their same methodology, we measured cognition in Brachyrhaphis rhabdophora by presenting them with the task of locating a hidden food patch. I expected that that the predatory-prey population would complete this task more efficiently, although it’s possible that this species could produce the same contradictory results. Once the data are all collected, I will present the results and publish a paper on my findings.