Through anal sis of the relationships between the mean absolute rate of pre population increase and the predator, effeciency and between the mean absolute attack rate (dHa/dt) and the prey population densit (Ht), a common modle has been constituted for the functional response of predator to prey:wherein A is the behavioural constant of predator and pre ; f(Ht) is the function to be defined.( 1 )If the attack late is independent of the pre densit , then f(Ht) = constant, and thus the functional response mode...