The base population refers to the number of people in a given area (e.g. a nation, province, city, etc) to which a specific vital rate applies, that is, the denominator of the crude birth rate or deat [..]

The population of animals whose parents are either unknown or ignored for the purposes of inbreeding and relationship calculation-typically the individuals appearing at the back of the pedigrees of th [..]

The population of trees from which individuals are chosen to establish the breeding population for a tree improvement program. Generally refers to a wild population within a breeding region.

The beginning population upon which population projections are based on. Base populations are generally taken from the last full census year population.