Predator-prey relationship

• The relationship between predator and prey causes fluctuations in both predator and prey numbers
• Predation therefore helps to control the sizes of both populations
• Predators control the prey numbers, but at the same time the number of available prey also controls the number of predators
• The higher the prey numbers, the more predation will occur
• The lower the prey numbers, the fewer predators will survive due to a shortage of food
• Predation is a density-dependent factor