(spawning stock biomass)

См. также в других словарях:

• 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 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 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 — the total weight of the fish in a stock that are old enough to spawn; the biomass of all fish beyond the age or size class in which 50% of the individuals are mature. Generally used for females only. May be used instead of measuring egg… …   Dictionary of ichthyology

• 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… …   Fisheries — dictionary

• spawning stock biomass — The total weight of all mature fish in a population …   Fisheries — dictionary

• spawning stock biomass — (SSB) The total weight of all sexually mature fish in the population. This quantity depends on year class abundance, the exploitation pattern, the rate of growth, fishing and natural mortality rates, the onset of sexual maturity and environmental …   Fisheries — dictionary

• spawning stock biomass — (SSB) The total weight of all sexually mature fish in the population. This quantity depends on year class abundance, the exploitation pattern, the rate of growth, fishing and natural mortality rates, the onset of sexual maturity and environmental …   Fisheries — dictionary

• spawning stock — the mature part of the stock that is able to spawn; the number or biomass of all fish beyond the age or size class in which 50% of the individuals are mature. Also called adult stock …   Dictionary of ichthyology

• 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

• parental biomass — the weight of the adult spawning population of a species. Also called spawning stock biomass …   Dictionary of ichthyology