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Biological Basis of Behavior

Biological Basis of Behavior

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Biological Basis of Behavior

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  1. Biological Basis of Behavior • A behavior based on genetic maturation is termed; Instinctive Behavior

  2. Instinctive behavior • Has the appearance of a critical period of development.

  3. Deprivation Experiment • The animal is deprived of “normal” development during this critical period

  4. Four Criteria for Instinctive Behavior 1) Species specific behavior

  5. The behavior must be limited to a given species: • Following behavior of gray lag geese • Using the bill as a straw to suck up water by the pigeon. • Imprinting in precocial birds.

  6. 2) The behavior must be patterned

  7. The behavior must be unlearned

  8. Goal directed

  9. Best seen in three experimental models Konrad Lorenz - precocial birds Niko Tinbergen - three and ten spine stickleback Peter Maller - songs in birds

  10. The protection of its home territory. Stomach of the male turns bright red in the spring time. Females belly begins to swell with eggs. • The next slide show different lures used to get the three spine stickleback to show fighting behavior

  11. Models used to initiate fight behavior in stickleback fish

  12. The red belly of a male stickle back is a releasing stimulus for fighting behavior of the target fish.

  13. The target fish chases the red-belly invading fish when it get in the targets fishe’s home territory • It is within the home territory that the male target fish builds the nest. • When the target fish has built it nest it looks for a round belly female

  14. Three spine stickelback •

  15. The swollen belly of the female is a sign stimulus that releases a complex dance between the male and the female.

  16. The release of the eggs is a releasing stimulus for the male to nip the tail of the female. • She swims out of the nest, the male swims in and releases sperm. • Lorenz believed that all the motivation for this type of behavior was internal to the organism. He called the energy driving this behavior, “action specific energy”

  17. Three spine stickleback “pas de deux”

  18. When the female has enters the nest the male moves to the side of the nest. • The male stickleback pushes with his nose against the outside of the nest. • This push is a releasing stimulus for the female to release the eggs.

  19. Egg-rolling in the gray lag goose

  20. Fixed Action Pattern (FAP), egg-rolling

  21. Note the continues movement of the head when the egg is removed from under the bill. The is vacuous behavior and demonstrate the pattern that must be fullfilled if the behavior is a FAP

  22. Deprivation studies in monkeys • Monkeys at birth were separated from their mothers. • Housed singly with a diaper Singly housed monkeys

  23. Such animals do not breed when they reach maturity. • THEY DO NOT KNOW HOW TO BREED, NEITHER MALE NOR FEMALE KNOW THE MECHANISM OF BREEDING

  24. Surrogate raised monkeys • Contact Comfort • Contact Comfort

  25. Wire vs. Terry cloth


  27. Biological basis of Play