A group of individuals within a species that, based on similarities in their production characteristics, are often managed as a unit in support of the same fisheries. In practice, stocks sometimes include individuals from multiple populations.

An aggregate of populations of a single species that are grouped for management purposes. They generally have similar migration patterns and run timing.

group of individuals of a species (usually genetically distinct and/or physically separated) which can be regarded as an entity for management or assessment purposes

An Atlantic salmon population that is reproductively isolated from other Atlantic salmon populations. A river system may contain one or several stocks.

A biological population, generally defined for management purposes.

A population of individuals that are managed as a single unit within a fishery

A genetically distinct group of chinook salmon or steelhead trout. The AFRP defines a stock as a group of individuals which are more likely to mate with each other than with individuals not included within the group.

Animals of the same species, usually aquatic or marine, that reproduce with one another and live in the same general geographic area.