Real world ie more complicated than

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Unformatted text preview: unpalatable taste –  Jays and monarch butterflies Antipredator Adaptations –  Toxic skin poisons (note also: coloration) adapAve coloraAon •  the above have been types of aposema'c coloraAon (i.e. warning coloraAon) •  the opposite strategy: –  camouflage –  also called crypsis or cryp'c colora'on hRp:// Flounder_camo_md.jpg Antipredator Adaptations •  Camouflage (cryptic coloration, or crypsis) •  – good for prey species –  Blending of organism into background color –  Stick insects mimic twigs and branches Leafy Sea Dragon - Phycodurus eques hRp:// g2_view=core.DownloadItem&g2_itemId=13376&g2_serialNumber=2 hRp:// hRp:// biston_betularia_larva01.jpg Camouflage (cryptic coloration, or crypsis) -also good for predators hRp:// Antipredator Adaptations •  Camouflage (cont.) –  Zebra stripes: blend into grassy background Antipredator Adaptations •  mimicry of a snake by a caterpillar Leucorampha Ornatus spicebush swallowtail Papilio troilus hRp:// content/uploads/2009/07/ spicebush_1571s- medium.jpg More examples of mimicking dangerous animals hRp:// hRp:// content/uploads/2009/07/spicebush_1571s- medium.jpg hRp:// 4391596229/ Antipredator Adaptations •  Adult Lepidopterans may mimic bird droppings ‘BeauAful wood nymph’ genus Eudryas (spelled wrong in original version of this slide) Antipredator Adaptations •  Chemical defense –  Ex. bombardier beetles •  hydroquinone and hydrogen peroxide (stored in separate glands then mixed) Brachinus Antipredator Adaptations Masting (see previous lecture) –  Common to trees subject to seed herbivory Acorn weevil (Family Coleoptera [beetles]) Curculio nucum hRp:// hRp:// eaAng.jpg hRp:// hRp:// %20Weevil%2092807.preview.jpg Antipredator Adaptations Masting –  Ex. 17-year and 13-year periodical cicadas –  massive emergence in single years •  “satiates” predator consumption – not enough predators to eat them all cicadas •  nymph stages underground –  suck sap from roots •  most cicadas – 2- 5 years –  even shorter life cycles are longer than life cycle of many of their predators ParasiAsm •  Defining parasiAsm •  Hosts have evolved defenses against parasites •...
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This note was uploaded on 10/02/2013 for the course BIO 201 taught by Professor True during the Spring '08 term at SUNY Stony Brook.

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