BIOL10004 Lecture Notes - Lecture 14: Malathion, Insecticide, Endangered Species

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28 Aug 2018
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Evolutionary change in one species may become a new selective force on the other, which may respond in turn. Such co-evolutionary processes generate some of the most remarkable examples of ecological and evolutionary phenomena. Specialist frog-eating bats of the new world tropics. Use sophisticated hearing to detect frogs in the dark. Some frog species have responded to this predatory selec=on pressure by producing toxins that make them unpalatable. In turn, bats have learnt to discriminate between poisonous and non-poisonous frogs! Mother cuckoo adds an egg to the clutch of the host" species. Cuckoo chick develops more quickly and hatches earlier than host chicks. Host parents then raise the cuckoo chick as its own. Selection on host to avoid being duped. Selection on the cuckoo to avoid being detected. Horsfield"s bronze cuckoo has evolved a mime=c egg that fairy-wrens are unable to distinguish from their own. In response, fairy-wrens have acquired the ability to recognise and reject cuckoo chicks.

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