Often, the population is affected by.

Define density dependent limiting factor. Any of these factors—food, shelter, breeding sites, predators, and more—may serve to limit the growth of a rabbit or toad population. Any factor that regulates the size of a population under natural circumstances by acting more severely on a population when it is large than when it is small. These can be things like food, shelter, or other limited resources.

Fleas and ticks can spread easily throughout the coyote population, and can cause sickness throughout the whole pack.