Predators kill prey and prey attempt to avoid being killed by predators; the former obviously reduces the number of prey but, according to a new study, fear (avoiding being killed) can itself halve the population size of prey in 5 years or less, by so impairing parental investment and care fewer than half as many young reach adulthood and those that do are permanently handicapped.
Click here for original story, Fear of predators in free-living wildlife reduces population growth over generations
Source: Phys.org