maximum sustainable yield
(缩略词： MSY)
noun
mass noun
1- (especially in forestry and fisheries) the maximum level at which a natural resource can be routinely exploited without long-term depletion（尤指林业和渔业）最大可持续产量。
1.1
- Ecology the size of a natural population at which it produces a maximum rate of increase, typically at half the carrying capacity【生态】（使自然种群产生最大增长率的）最大持续产量。