spawning stock biomass per recruit
(SSB/R)
The effective spawning output produced by a recruit throughout its life. Each recruit must be able to replace itself to ensure sustainability, and analyses using the SSB/R approach attempt to determine critical levels of fishing effort above which sustainability is endangered.

Fisheries — dictionary. . 2004.

Look at other dictionaries:

  • spawning stock biomass per recruit — the spawning stock biomass divided by the number of recruits to the stock. It is the expected lifetime contribution to the spawning stock biomass for a recruit of a specific age, e.g. per age 2 individual. Abbreviated as SSB/R …   Dictionary of ichthyology

  • spawning stock biomass per recruit — (SSB/R) The expected lifetime contribution to the spawning stock biomass for a recruit of a specific age (e.g., per age 2 individual). For a given exploitation pattern, rate of growth, and natural mortality, an expected equilibrium value of SSB/R …   Fisheries — dictionary

  • spawning stock biomass pe pecruit — (SSB/R) The expected lifetime contribution to the spawning stock biomass for a recruit of a specific age (e.g., per age 2 individual). For a given exploitation pattern, rate of growth, and natural mortality, an expected equilibrium value of SSB/R …   Fisheries — dictionary

  • spawning potential ratio — the number of eggs that could be produced by an average recruit in a fished stock under a given regime divided by the number of eggs that could be produced by an average recruit in an unfished stock. This may also be expressed at the spawning… …   Dictionary of ichthyology

  • SSB/R — spawning stock biomass per recruit (the spawning stock biomass divided by the number of recruits to the stock. It is the expected lifetime contribution to the spawning stock biomass for a recruit of a specific age, e.g. per age 2 individual) …   Dictionary of ichthyology

  • SPR — spawning potential ratio ( the number of eggs that could be produced by an average recruit in a fished stock under a given regime divided by the number of eggs that could be produced by an average recruit in an unfished stock. This may also be… …   Dictionary of ichthyology

  • biological reference point — a fishing mortality rate or biomass that may provide acceptable protection against growth overfishing and/or recruitment overfishing for a particular stock. It is usually calculated from equilibrium yield per recruit curves, spawning stock… …   Dictionary of ichthyology

  • biological reference points — Indicators or signposts against which the status of a stock can be judged. Two types are often used: based on fishing mortality and based on the sustainability of recruitment. Reference points can be either desirable targets (target reference… …   Fisheries — dictionary

  • F high — Fhigh F corresponding to a spawning stock biomass per recruit (equal to the inverse of the 90% percentile of the observed R/SSB). A level of F where recruitment has not been sufficient to balance the mortality in about 9 years of 10. Exploitation …   Dictionary of ichthyology

  • F30%SPR — F corresponding to a spawning stock biomass per recruit (SSB/R) which is 30% of the SSB/R obtained when F=O …   Dictionary of ichthyology

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