LIFESCI 2D03 Chapter Notes - Chapter 8: Killifish, Institute For Operations Research And The Management Sciences, Alarm Signal
16 Dec 2016
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8. 1 animals modify behaviour to reduce predation risk. Cryptic colouration is a morphological adaptation that allows the organism to match with the environment to reduce detection by predators. All animals can reduce predation risk by reducing their overall level of activity. Prey have developed evasive techniques: example of bat/moth; moth developed sonar system, but so did moths. Young juveniles display colour variation that ranges from brown to tan to white, with spots and stripes: when they get older, it will change to a more uniform light purple colour. Hypothesized that the complex colouration is done to minimize detection by predators: more cryptic on the shell-hash background of ocean floor. Whiptail lizards can be killed while searching for food. Conducted an experiment and found that lizards in a pen with a predator were less active and spent less time moving, and if they did, they moved around slowly.
