BIEB 166 Lecture 12 (WI13)

3 Pages
Unlock Document

Biol/Ecology, Behavior, & Evol
BIEB 166
James Nieh

Lecture 12 Referential Communication - Communication that provides information about the external environment in a coded way Warm/hot outside; direction (5miles north) 1. Stimulus class specific - Always refers that same object/condition - Not a general alarm call - Most animals do not have referential communication - Also applicable to communicating about location ○ Direction is specific (5miles north) 2. Context independent - How to test to make sure is referential - Even didn't see the source of danger, still have to respond appropriately - Prove the animal/human actually using the information that is given but not acting on their own because of other stimulus Vervet monkeys - Referential communication - Specific to the item they're trying to communicate ○ Eagle: go to the middle of the tree ○ Snake: go to top of the tree - Context independent ○ The animal doesn't see the snake/eagle but still respond to the signal Honey bees (genus Apis) - Highly social bees (highly cooperative) - Every individuals in the community is the offspring of the queen bee The discovery - Karl von Frisch - Honey bee waggle dance ○ Bees moving in a figurate style shape ○ Body tracing a kind of figurate ○ Other bees are very interested in the behavior, following her very close behind, tracking her as she made the motions - First non-human example of sophisticated referential communication The recruitment system 1. Honey bees recruit to many types of resources - Nectar - Pollen - Water - Good nest sites - Resin collection sites 2. Round dance - At close distances (0-10m) from the food source - Does not communicate food location - Only sends bees on a random search of the area less than 100m from the nest 3. Waggle dance - >100 m from the food source - Giving bees sample of food (odor of flower, know the nectar) - Communicates distance and direction - Continuous transition forms — round to waggle dance - Serving common purpose - The queen bee has information she wants to give, and the other bees have information that they want to get - Not necessarily to have goal driven behavior in the process ○ Process of natural selection have selected honeybees to act such that waggle dancers are providing the location of the food source because this is beneficial to the colony ○ Acted on signal receivers to act as if they are receiving the information in order to find food to benefit the colony Sun's Azimuth - The direction of the sun with respect to north as projected onto a horizontal plane - Birds use it to navigate - Bees are not using the north/south system ○ Everything is with reference of the sun 1. Waggle dance pointing at the food source - Evolutionary beginning ○ The bee is drawing a little map to direct the bees ○ If it is a good food source, she would go to the flower and get the nectar, and give it to the bees - Showing by the direction where to go to find food - Direction coded in the angle of the waggle run - Transpose the angle of the dance ○ If the flower is 30 degrees right to the sun, the dance would be 30 degrees to the right of vertical (azimuthic angle) ○ Dancing with respect to the up position (with respect to gravity) 2. Dancing inside dark nest - Dancer is referring to the sun and therefore needs to know the sun's position ○ Observe how fast the sun is moving ○ Able to remember where the food source is relative to the sun ○ Calculate where the sun would be - This position changes with time and thus the dancer needs an internal clock to correct for the sun's position when: ○ She is performing marathon dance
More Less

Related notes for BIEB 166

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.