Behavioral Biology Evolution of Social Systems. Societies Groups of organisms of the same species which cooperate to exist.

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Presentation transcript:

Behavioral Biology Evolution of Social Systems

Societies Groups of organisms of the same species which cooperate to exist.

Benefits of Sociality Kin Selection Decreased Predation Risk Increased Feeding Sources Increased Hunting Success

Insect Societies Hymenoptera –Honeybees –Leaf-cutter ants Isoptera –Termites

Honeybee Society Caste system – Division of Duties –Queen Diploid female Duty: Reproduction Produces ‘Queen substance’ Lays 1500 eggs/day till death or runs out of sperm

Honeybee Society Which one is the Queen?

Honeybee Societies Queen Cell

Honeybee Society Caste system – Division of Duties –Drone Haploid Male Duty: Find the queen and mate Dies after reproduces (2 seconds!)

Honeybee Societies Drone Workers

Honeybee Societies Drone Cells

Honeybee Society Caste system – Division of Duties –Worker Diploid female with ovaries suppressed Duty: Everything except laying eggs

Honeybee Society

Workers ‘Festooning’

Honeybee Society Worker ‘Scenting’ to Signal Disturbance

Bibliography Raven, Peter H. Et al Biology, 8 th ed. McGraw Hill Higher Education. New York, NY. All photos are by D. Hautau, Alpena Community College.