/newsroom/taxonomy/term/3408/all en /newsroom/channels/news/male-guppies-grow-larger-brains-response-predator-exposure-287497 <p><span>Male guppies exposed to predators in the wild or in captivity have heavier brains than those living in relatively predator-free conditions, according to new research published in the journal <em>Functional Ecology</em>.</span></p> <p>Behavioural ecologists at 91ÉçÇø in Montreal sampled guppies from two rivers in northern Trinidad. In each river, guppies live both above a waterfall, a location that only guppies and a few other small species of fish have managed to colonize, and below the fall, where many predators including pike cichlids live.</p> Mon, 04 Jun 2018 17:48:51 +0000 laurie.devine@mcgill.ca 43306 at /newsroom