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6.4.2.1. Gulland Equation
6.4.2.1. Gulland Equation
The following equation is most commonly used for estimation of potential yields.
MSY = M $$\cdot$$ 05 $$\cdot$$ Bv. ………………………………. (1)
Bv is the Virgin standing stock (Estimated in a trawling or acoustic survey)
M = Natural mortality coefficient
For less exploited stocks, the following equation is used.
MSY = Zt $$\cdot$$ 0.5 Bt. …………………………………. (2)
Zt is the exponential rate of total mortality (F + M = Z) of the year t.
Bt = standing stock size in that year
Last modified: Friday, 22 June 2012, 7:08 AM