instantaneous rate of surplus production

instantaneous rate of surplus production
Equal to rate of growth plus rate of recruitment less rate of natural mortality - all in terms of weight and on an instantaneous basis. In a "balanced" or equilibrium fishery, this increment replaces what is removed by fishing, and rate of surplus production is numerically equal to rate of fishing. Also called: instantaneous rate of natural increase.

Fisheries — dictionary. . 2004.

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