Bio%20201%20S12%20Lect%2018%20%28True%29%20v2

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://upload.wikimedia.org/wikipedia/commons/5/56/ 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://www.calacademy.org/gallery/main.php? g2_view=core.DownloadItem&g2_itemId=13376&g2_serialNumber=2 hRp://waynesword.palomar.edu/lmexe10b.htm hRp://biology.fullerton.edu/life/im/ biston_betularia_larva01.jpg Camouflage (cryptic coloration, or crypsis) -also good for predators hRp://waynesword.palomar.edu/lmexe10b.htm 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://laststands.kennedywarne.com/wp- content/uploads/2009/07/ spicebush_1571s- medium.jpg More examples of mimicking dangerous animals hRp://waynesword.palomar.edu/lmexe10b.htm hRp://laststands.kennedywarne.com/wp- content/uploads/2009/07/spicebush_1571s- medium.jpg hRp://www.flickr.com/photos/drphotomoto/ 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://abbytrysagain.typepad.com/photos/uncategorized/acorns_1.jpg hRp://beaconwm.files.wordpress.com/2009/05/squirrel- eaAng.jpg hRp://www.cirrusimage.com/Trees/acorn_weevil.jpg hRp://www.ipm.iastate.edu/ipm/hortnews/files/images/Acorn %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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