Definition of Term

year class

(English) All the individuals of a population of fishes born or hatched in the same year. After this brood is recruited to the fishery it appears year after year until all its members die. Also called brood, year brood, cohort or generation. In the northern hemisphere where spawning occurs in fall and hatching in spring, the calendar year of the hatch is commonly used to identify the year class, except usually for salmonids.

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