Psc101 Owings Lecture 6

Psc101 Owings Lecture 6 - 1 Predator-Prey cont. Selection...

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Unformatted text preview: 1 Predator-Prey cont. Selection arising from rattlesnakes has favored evolution of venom resistance sophisticated ways of dealing with and assessing rattlesnakes behaviorally including the elicitation and use of rattling to judge snake size and body temperature and therefore risk skills at confronting and attacking rattlesnakes without being bitten have knowledge of where snakes hang out and how long the hang around Infrared signaling (Aaron Rundus) Rattlesnakes are pit vipers have infrared sensitive pits capable of detecting infrared radiation or heat at a distance very sensitive nerve Fbers- 0.003 degrees C changes important in predatory behavior 2 Tested adult female California ground squirrels Looked at the surface temperature of six regions of the squirrels head body and tail during interactions with rattlesnake, gopher snake (a non pit viper), conspeciFc, and no stimuli Selective targeting of infrared component of tail flagging Gopher snake Rattlesnake Selective targeting of infrared component of tail flagging But, does the infrared make a difference in the...
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This note was uploaded on 09/05/2008 for the course PSC 101 taught by Professor Owings,coss,henry during the Spring '07 term at UC Davis.

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Psc101 Owings Lecture 6 - 1 Predator-Prey cont. Selection...

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