optimum yield

optimum yield
the yield from a fishery which provides the greatest overall benefit to the nation with particular reference to food production, recreational opportunities and conservation or, allows rebuilding of overfished stocks. It is based on maximum sustainable yield (q.v.) as modified by economic, social or ecological factors. Generally catches are kept at less than the maximum sustainable yield as this keeps the biomass on the high side (and also it is not easy to assess what the maximum sustainable yield is). At this lower level there are more fish that are bigger, easier to catch and less expensive to do so, of better value, and easier to process. Note that the optimum may not be more big fish. It may be a longer season or many small fish as with sardines. The downside is fewer fishery jobs

Dictionary of ichthyology. 2009.

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  • optimum yield — (OY) The yield from a fishery which provides the greatest overall benefit to the nation with particular reference to food production and recreational opportunities; it is based on MSY as modified by economic, social or ecological factors.… …   Fisheries — dictionary

  • optimum yield — (OY) The yield from a fishery which provides the greatest overall benefit to the nation with particular reference to food production and recreational opportunities; it is based on MSY as modified by economic, social or ecological factors.… …   Fisheries — dictionary

  • DBLCI Optimum Yield (OY) Index — In May 2006, Deutsche Bank launched a new set of commodity index products called the Deutsche Bank Liquid Commodities Indices Optimum Yield, or DBLCI OY. The DBLCI OY indices are available for 24 commodities drawn from the energy, precious metals …   Wikipedia

  • DBLCI Optimum Yield (OY) Balanced Index — The DBLCI OY Balanced has the same underlying 14 commodities as the DBLCI OY Broad, but, the energy sector weight is reduced from 55% of the broad index to 35%. The DBLCI OY Balanced is designed to be UCITS III compliant, that is the weight of no …   Wikipedia

  • optimum sustainable yield — optimum yield …   Dictionary of ichthyology

  • Optimum sustainable yield in fisheries — In population ecology and economics, optimum sustainable yield is the level of effort (LOE) that maximizes the difference between total revenue and total cost. Or, where marginal revenue equals marginal cost. This level of effort maximizes the… …   Wikipedia

  • Optimum sustainable yield — In population ecology and economics, optimum sustainable yield is the level of effort (LOE) that maximizes the difference between total revenue and total cost. Or, where marginal revenue equals marginal cost. This level of effort maximizes the… …   Wikipedia

  • Optimum population — The optimum population is the size of a population that is optimal. There are, however, various opinions on what optimal means in this usage, resulting in various end targets for it,[1] but estimations usually take ecological sustainability and… …   Wikipedia

  • optimum height of burst — For nuclear weapons and for a particular target (or area), the height at which it is estimated a weapon of a specified energy yield will produce a certain desired effect over the maximum possible area …   Military dictionary

  • 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

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