year class
(cohort)
Fish in a stock born in the same year. For example, the 1987 year class of cod includes all cod born in 1987, which would be age 1 in 1988. Occasionally, a stock produces a very small or very large year class which can be pivotal in determining stock abundance in later years.

Fisheries — dictionary. . 2004.

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  • year class — (year cohort) Fish in a stock born in the same year. For example, the 1987 year class of cod includes all cod born in 1987, which would be age 1 in 1988. Occasionally, a stock produces a very small or very large year class which can be pivotal in …   Fisheries — dictionary

  • year class — all the individuals of a population of fishes born or hatched in the same year, e.g. 1995. After this brood is recruited to the fishery it appears year after year until all its members die, and is referred to as the 1995 year class throughout its …   Dictionary of ichthyology

  • year-class — Individuals spawned in the same year (or spawning season, when that spans the end of one year and the beginning of the next) …   Fisheries — dictionary

  • year class — noun : the group of young of one kind of animal produced during one year used chiefly of fishes …   Useful english dictionary

  • year-class effect — the common domination of a species population by individuals recruited in one reproductive season …   Dictionary of ichthyology

  • dominant year class — a year class that predominates in the fishery, often continuing over several years …   Dictionary of ichthyology

  • incoming year class — the year class of fish recruited to the fishable stock …   Dictionary of ichthyology

  • 1+ year-class — Fish that are between one and two years old (similarly, 2+ between two and three years etc) …   Fisheries — dictionary

  • year brood — year class …   Dictionary of ichthyology

  • year — /year/, n. 1. a period of 365 or 366 days, in the Gregorian calendar, divided into 12 calendar months, now reckoned as beginning Jan. 1 and ending Dec. 31 (calendar year or civil year). Cf. common year, leap year. 2. a period of approximately the …   Universalium

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