Cubillos, L.A. (2003) An approach to estimate the natural mortality rate in fish stocks. Naga, Worldfish Center Quarterly, 26(1), pp. 17-19.
A simple approach is introduced to estimate the natural mortality rate (M) of fish stocks. The approach is based on the age at maximum cohort biomass, or critical length (L*) concept. The ratio of the critical length to the asymptotic length ( = L*/L8) is relatively constant in 141 fish stocks at 0.62 (CV = 21.4 per cent) and the relationship M = 3K(1- )/ is derived and could be used to estimate M, where K is the growth coefficient of the von Bertalanffy growth function. Average values of are given for the various Families of fish in order to estimate M based on closely related species.
|Item Type: ||Article|
|Title: ||An approach to estimate the natural mortality rate in fish stocks|
|Personal Creator/Author: |
|Journal or Publication Title: ||Naga, Worldfish Center Quarterly|
|Page Range: ||pp. 17-19|
|Issuing Agency: ||WorldFish Center|
|Uncontrolled Keywords: ||Mortality; Stocks; Life history; Marine fish|
|Item ID: ||9140|
|Depositing User: ||Mr William Ko|
|Date Deposited: ||27 Nov 2012 08:27|
|Last Modified: ||27 Nov 2012 08:27|
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