stock-recruitment relationship
The relationship between the level of parental biomass and subsequent recruitment. Determination of this relationship is difficult and usually involves the study of population size-age composition, growth and mortality rates.

Fisheries — dictionary. . 2004.

Look at other dictionaries:

  • stock recruitment relationship — stock recruitment model. Abbreviated as SSR …   Dictionary of ichthyology

  • stock recruitment model — a fishery model that predicts the amount of juvenile recruitment as a function of the parent stock. Also called stock recruitment relationship …   Dictionary of ichthyology

  • SRR — stock recruitment relationship (the relationship between the level of parental biomass, e.g. spawning stock size, and subsequent recruitment level. Difficult to determine accurately) …   Dictionary of ichthyology

  • B 20% B-virg — level of spawning stock corresponding to a fraction (here 20%) of the unexploited biomass. Virgin biomass is estimated as the point where the replacement line for F=0 intersects the stock recruitment relationship or as the biomass from a spawning …   Dictionary of ichthyology

  • B 50% R — the level of spawning stock at which average recruitment is one half (50%) of the maximum of the underlying stock recruitment relationship …   Dictionary of ichthyology

  • 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

  • age-structured production model — a stock assessment programme based on a deterministic form of a stock recruitment relationship, with non equilibrium tuning of abundance indices. Abbreviated as ASPM …   Dictionary of ichthyology

  • ASPM — age structured production model (a stock assessment programme based on a deterministic form of a stock recruitment relationship, with non equilibrium tuning of abundance indices) …   Dictionary of ichthyology

  • biomass at MSY — the long term average biomass value expected if fishing at FMSY (the fishing mortality rate which, if applied constantly, would result in maximum sustainable yield. Can be estimated from simple biomass aggregated production models or from age… …   Dictionary of ichthyology

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