surplus production
Inherent productivity of a fish stock that can be harvested on a sustainable basis. Based on the theory that, at large stock size, reproductive rates and rate of stock growth are slowed by self-regulating mechanisms, and that stock growth rates are faster after removals, as the stock attempts to rebuild. In theory, fishing can be moderated to take advantage of the more productive stock growth rates, provided that it does not exceed the stock recovery capacity.

Fisheries — dictionary. . 2004.

Look at other dictionaries:

  • surplus production — Production of new weight by a fishable stock, plus recruits added to it, less what is removed by natural mortality. This is usually estimated as the catch in a given year plus the increase in stock size (or less the decrease). Also called:… …   Fisheries — dictionary

  • surplus production — Production of new weight by a fishable stock, plus recruits added to it, less what is removed by natural mortality. This is usually estimated as the catch in a given year plus the increase in stock size (or less the decrease). Also called:… …   Fisheries — dictionary

  • surplus production — production of new weight by a fishable stock, plus recruits added to it, less what is removed by natural mortality. Usually estimated as the catch in a given year plus the increase in stock size or less the decrease (Ricker, 1975). As a stock is… …   Dictionary of ichthyology

  • surplus production model — an estimate of the catch in a given year and the change in stock size. The stock size could increase or decrease depending on new recruits and natural mortality. A surplus production model estimates the natural increase in fish weight or the… …   Dictionary of ichthyology

  • surplus production model — Mathematical representation of the way a stock of fish responds to the removal of its individuals (e.g. by fishing) …   Fisheries — dictionary

  • 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… …   Fisheries — dictionary

  • 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… …   Fisheries — dictionary

  • 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… …   Dictionary of ichthyology

  • annual surplus production — the assumption in fisheries that there is a biomass removable without changing population size …   Dictionary of ichthyology

  • Surplus product — Part of a series on Marxism …   Wikipedia

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