animal behavior march 25th

animal behavior march 25th - Communicat ion Sende r Receive...

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Unformatted text preview: Communicat ion Sende r Receive r sign al Signal Modalities (channels): acoustic visual tactile chemical vibr ational (intent: provide information) the process by which senders use specially designed signals or displays to modify the behavior of receivers Communicat ion Sende r Receive r sign al the process by which senders use specially designed signals or displays to modify the behavior of receivers (channel ) 4 components Sender Receive r Channe l Communicat ion Communicat ion Sende r Receive r sign al the process by which senders use specially designed signals or displays to modify the behavior of receivers Change in behavior based on information transmitted (message) (meaning ) Change in fitness based on information transmitted Contexts for Communication 1. Establishing territories (ex: redwing blackbirds) 2. Social dominance (so you don’t have to kill one another) 3. Mate attraction 4. Pair bonding 5. Exchanges between young and parents- feeding/ contact 1. Alarm/ protection/ signal danger – anti-predator 2. Threat/ predator deterrence 3. Group cooperation/ coordination – hunting/ schooling Communicat ion H onest Communication – ‘true’ signal –raises the fitness of both sender and receiver Eg warning coloration, bearing teeth, mating displays Sender only spends effort/ risk ect to produce signal if it has a high probability of altering the behavior of the receiver to improve sender’s fitness (survival reproduction) Aposematic color ation – conspicuous coloring to honestly Warn potential predators of danger poison frog Communicat ion Dishonest Communication – lowers the fitness of either sender or receiver 1 . – wrong reciever costs sender 2.- deception could cost reciever Eavesdr opping – signal is intercepted by the “wrong” recieve r – could be used against the sender or intended reciever eg predator hears mating call and locates Deceit – signal is dishonest because it doesn’t convey right abilitie Dishonest Communication/Deceit Searcy et al, 1991 Dale & Slagsvold, 1994 Pied flycatcher Males have >1 territory Females gain from mating with a male who has no other mates Males deceive females Females asses whether male is mated – of he is alone on a territory during repeated visits by the female then he is probably unmated By repeatedly sampling of male behavior, females are able to avoid mating with previously mated males Channels of Communication Visio n Advantages Disadvantage s Transmit info rapidly Instantly locatable Fast disappearance (there then not there) Use while moving Showing energetically cheap (not to grow but to use) Require clear line of sight- uncluttered habitat Easily attract unwanted receivers- predators Cant be used at night –light dependant (except fireflies etc) Growing= high energy (ex peacocks tailo very costly) Mechanisms of...
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This note was uploaded on 04/06/2008 for the course PSYC 2420 taught by Professor Wolley during the Spring '08 term at Columbia.

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animal behavior march 25th - Communicat ion Sende r Receive...

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