BIOL 1902 Lecture Notes - Lecture 4: Müllerian Mimicry, Bumblebee, Hoverfly
23 May 2015
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Component 1: staying alive cont"d: defences cont"d, appearances cont"d, chemical defenses cont"d. Animals (often small) armed with chemical weapons often bear aposematic coloration. Aposematic coloration allows a predator to learn and avoid that color pattern: ex. A frog who gets stunk by a wasp when it tries to eat it won"t eat yellow insects anymore: ex. Yellow colored insects sting, avoid (i. e. yellow jackets, bees: mullerian mimicry when a group of unrelated animals are all defended and bear similar appearances, ex. Milkweed beetle and milkweed bug both are red with black patches, and both sequester terpenoid from milkweed. The cardiac glycosides are passed on to the butterfly stage. Batesian mimicry have a model that is bad to eat (strong defense) and a mimic that is safe to eat: ex. Viceroy butterfly looks very similar to a monarch but is quite safe to eat for birds. The poisonous monarch is the model that the edible viceroy mimics: ex.
