When a population of laboratory rats is allowed to increase in a confined space, the rats develop acutely abnormal patterns of behavior that can even lead to the extinction of the population ...

Limitations to population growth are either density-dependant or density-independent ... They found that when squirrel densities were high, territoriality relegated some females to poor quality ...

Population density (often abbreviated PD) is a compound measure that tells us roughly how many people live in an area of known size. It is commonly used to compare how 'built-up' two areas are.

density-dependent factors: Depending on the local density of the population density-independent ... The slow-growth-high-mortality hypothesis: A test using the cabbage butterfly.