Animal behavior.txt

• Evolutionary stable strategy ( game theory and assumptions)
• Evolution of display ( hawks and doves, hawks and doves and bourgeois)

it is a behavioral response of an individual

strategy which if adopted by all members of a population cannot be invaded by any alternative strategy . This is found using game theory

it is needed when fitness consequences of a behaviour depend on what others are doing.( frequency dependent)

right and left jaw fish

• Infinite population
• Asexual reproduction
• all strategies are specified
• either pairwise contest occur or one individual competes against a group

• display
• fight but risk injury
• retreat

when they are all hawks or all doves. Usually when V resource is greater than cost

It means fitness depends on strategy frequancy

stable strategy set in which a single individual sometimes performs one strategy and sometimes another with the probability p.

in which a fraction p of the population adopts one strategy and the remainder 1-p adopts another.

• they have three throat color morphs
• Blue they are ineffective against orange males
• orange males have large territories
• yellow males sneak copulation
• this is an example of stable polymorphism

• it is where opponents differ but not with regard to fighting ability
• example is the hawk dove and bourgeois

if V> C then hawk will be pure ESS and when V