BIOL 1902 Lecture Notes - Lecture 3: Sawfly, Quinone, Aposematism
27 Oct 2017
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Use of chemicals (toxin) form of defense: sawfly larvae. Bombardier beetle*** hot quinone gas (explosive and burns activated by the enzyme reacting) Aposematic coloration term used to describe colors/patterns. When a group of unrelated animals are, all defended, and bear similar appearances = m llerian mimicry. Monarch (model) and viceroy (gains benefit from monarch because it is poisonous while it itself is not generally won"t eat because they look similar) (mimic) Defined as: batesian mimicry (model and mimic) Wasps have many mimics (many unrelated insects have mimicked the wasps visual dragonfly, moth, beetle etc. ) Bumble bee (model stings) and hover fly (mimic harmless) Honeybee (model stings) and hover fly (mimic harmless) Number of models > # of mimics. Models and mimics must occur at same time of year. American toads have the toxin (bufotalin) in skin glands defense (behavioral defense): they puff up and look larger. Hognose snakes have a behavioral defense to play dead when being attacked.
