equilibrium yield
the yield in weight taken from a fish stock when it is in equilibrium with fishing of a given intensity, and (apart from effects of environmental variation) its biomass is not changing from one year to the next. Also called sustainable yield, equivalent sustainable yield. Abbreviated as YE or YE. No stock is really in balance with fishing effort because effort cannot be maintained at the same level and the stock is always changing in response to environmental variables

Dictionary of ichthyology. 2009.

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  • equilibrium catch — the catch (in numbers) taken from a fish stock when it is in equilibrium with fishing of a given intensity, and (apart from the effects of environmental variation) its abundance does not change from one year to the next. Also called sustainable… …   Dictionary of ichthyology

  • yield per recruit — The expected lifetime yield per fish 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 Y/R can be calculated for each level of F …   Fisheries — dictionary

  • yield per recruit — The expected lifetime yield per fish 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 Y/R can be calculated for each level of F …   Fisheries — dictionary

  • yield-per-recruit — the expected lifetime yield per fish of a specific age (or the average recruit), e.g. per age 2 individual. Abbreviated as Y/R. For a given exploitation pattern, fishing regime, rate of growth and natural mortality, an expected equilibrium value… …   Dictionary of ichthyology

  • equivalent sustainable yield — equilibrium yield …   Dictionary of ichthyology

  • sustainable yield — the yield (in weight or number) taken from a fish stock when it is in equilibrium with fishing of a given intensity, and (apart from effects of environmental variation) its biomass is not changing from one year to the next. Also called… …   Dictionary of ichthyology

  • Maximum sustainable yield — In population ecology and economics, maximum sustainable yield or MSY is, theoretically, the largest yield (or catch) that can be taken from a species stock over an indefinite period. Fundamental to the notion of sustainable harvest, the concept… …   Wikipedia

  • Nash equilibrium — A solution concept in game theory Relationships Subset of Rationalizability, Epsilon equilibrium, Correlated equilibrium Superset of Evolutionarily stable strategy …   Wikipedia

  • Mechanical equilibrium — A pendulum in a stable equilibrium (left) and unstable equilibrium (right) A standard definition of static equilibrium is: A system of particles is in static equilibrium when all the particles of the system are at rest and the total force on each …   Wikipedia

  • equlibrium yield — The yield in weight taken from a fish stock when it is in equilibrium with fishing of a given intensity, and (apart from effects of environmental variation) its biomass is not changing from one year to the next. Also called: sustainable yield,… …   Fisheries — dictionary

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