Assumptions:
• density-independent exponential growth of the prey population V in the absence of predators,
with intrinsic rate of increase b
• a constant predation rate a (fraction of the prey population eaten per predator), so that total
predation is proportional to the abundance of prey and the abundance of predators; there is no
slowing of predation at high prey abundance, and no interference among predators.
• a constant conversion rate c of eaten prey into new predator abundance
• a constant per capita mortality rate of predators,