recruit-to-spawner ratio

recruit-to-spawner ratio
an estimate of the number of recruits (fish that are available for harvest in addition to those that escape the fishery to spawn) produced by the previous generation of spawners. The spawner-to-spawner ratio estimates the number of spawners (those fish that reproduced or were expected to reproduce) in one generation produced by the previous generation of spawners. A spawner-to-spawner ratio of 1.0 indicates that, on average, each spawner produced one offspring that survived to spawn; the size of such a population would remain unchanged over that generation

Dictionary of ichthyology. 2009.

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Look at other dictionaries:

  • Fcrash — or FCRASH the fishing mortality rate corresponding to an equilibrium spawner per recruit (SPR) equal to the inverse of the survival ratio at the origin of the stock recruitment relationship. Used as a biological reference point. A stock exploited …   Dictionary of ichthyology

  • Ft — Ft; FT Fcrash (the fishing mortality rate corresponding to an equilibrium spawner per recruit (SPR) equal to the inverse of the survival ratio at the origin of the stock recruitment relationship. Used as a biological reference point. A stock… …   Dictionary of ichthyology

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