Do unprofitable prey evolve traits that profitable prey find difficult to exploit?

ABSTRACT: Prey that are unprofitable to attack (for example, those containing noxious chemicals) are often conspicuously patterned and move in a slower and more predictable manner than species lacking these defences. Contemporary theories suggest these traits have evolved as warning signals because they can facilitate both associative and discriminative avoidance learning in predators. However, it is unclear why these particular traits and not others have tended to evolve in unprofitable prey. Here we show using a signal detection model that unprofitable prey will evolve conspicuous colours and patterns partly because these characteristics cannot readily evolve in profitable prey without close mimicry. The stability of this signal is maintained through the costs of dishonesty in profitable prey. Ind

SUBMITTER: Sherratt TN 

PROVIDER: S-EPMC1559962 | biostudies-literature | 2005 Nov

REPOSITORIES: biostudies-literature