Handout- Week 6

Handout- Week 6 - Lecture 12: Referential Communication...

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Referential Communication = communication that provides information about the external environment in a coded way Referential communication is: 1) stimulus class specific (i.e. a signal is only used due to a certain stimulus) 2) context independent (i.e. the signaler can’t bring the object to show others, must be able to signal without the object) Example: Vervet Monkeys - Monkeys go to the ground to eat vulnerable - Keep a guard on watch The guard can make a call of “snake” which results in the monkeys standing up on their hind legs The guard can make a call of “danger from the air” which results in the monkeys running into the trees Note: These signals are taught from one generation to the next via “imitation learning.” If a juvenile uses a call that is incorrect, the mother will hit the juvenile teaches the juvenile that the call is wrong. This teaching from one generation to the next can be thought of as cultural learning. Example: Honeybees - Karl von Frisch observed the angle of the honey bee’s dance - originally thought the dance was communicating the presence of pollen We now know the honey bee recruitment system: - is used to recruit for several different types of resources floral (nectar, pollen) resin (propylis) mud, water - at close distances (less than 50 meters away) the honey bee dance does not communicate food location (round dance). At >100m, communicates distance and direction. There is a continuous transition between the round and waggle dance. - direction coded in the angle of the waggle dance Sun’s azimuth = the direction of the sun with respect to north as projected onto a horizontal plane Bees that have a horizontal nest are thought to be able to point to a food source in reference to the sun The bees that are enclosed in a nest where they can’t see the sun use gravity’s pull to detect “straight up” the angle between “straight up” and the bee’s dance can be considered the angle of the food source with respect to the sun. The sun also moves about 1 degree every four minutes. Dancers
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This note was uploaded on 10/28/2010 for the course BIEB 166 taught by Professor Nieh during the Spring '09 term at UCSD.

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Handout- Week 6 - Lecture 12: Referential Communication...

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