WELCOME

Md. Kawsar Ali Hawlader Senior Lecturer Dept. Of Biology Sub:Biology Second Paper

Chapter-12

Animal Behaviour

Innate behaviour and Theory of Pavlov”s

Learning output

After completing this lesson students should be able to…

tell the definition of innate behaviourexplain the social behaviour of beesexplain the innate behaviour of spider.

Justification of innate behaviour

1. Winter migration of birds:Periodic passing of animals one place to

another.Birds have mysterious ability to navigate.The migratory birds are- lesser whistling teal,

chhota sarali, goose, balihansh, darters, gurgani etc.

310 birds are migratory.Jahangirnagar university lake is the famous

for migratory birds.

Migrating Birds

Spider websThe phylum of spider

is arthropoda.Spiders have silk glands.There is a spinneret at

the tip of the abdomen.They can form different

types of webs.The webbing behaviour

are inherited by the spiders since 360 million years.

Spider webs

Learning behaviour

Learning can be define as a persistent change in behaviour that occures as a result of experience.

Learning behaviour

Theory of Pavlov’s: Reflex and saliva of dogs

The Russian scientist introduced this theory.

Pavlov rang a bell when he fed dog.

Once he only rang the bell but did not fed the dog.

This time on hearing the bell saliva is secreted from the mouth of dog.

Theory of Pavlov’s: Reflex and saliva of dogs

Group-A Group-B

TEAM WORK

Write down the behaviour of bee

Write down the innate behaviour of spider.

EvaluationProfessor Rakib was watching a circus programme on

his T.V. In this circus an elephant was playing with a football in certain way. Having seen this he thought that animals have some special behaviours. He observe that , saliva is secreted from the mouth of his pet dog . Then he said to his wife,” the secretion of saliva from the mouth of a dog indicates a famous and special theory of zoology”

a. What is learning ?b. What is meant by reflex action?c. Describe the special behaviour of animals.d. Analyze the last statement of professor Rakib.

HOME WORK

Write down Pavlov’s theory.