An approach to estimate the natural mortality rate in fish stocks

Cubillos, L.A. (2003) An approach to estimate the natural mortality rate in fish stocks. Naga, Worldfish Center Quarterly, 26(1), pp. 17-19.

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Abstract

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:
CreatorsEmail
Cubillos, L.A.
Journal or Publication Title: Naga, Worldfish Center Quarterly
Volume: 26
Number: 1
Page Range: pp. 17-19
Date: 2003
ISSN: 1511-8533
Issuing Agency: WorldFish Center
Uncontrolled Keywords: Mortality; Stocks; Life history; Marine fish
Subjects: Fisheries
Item ID: 9140
Depositing User: Mr William Ko
Date Deposited: 27 Nov 2012 07:27
Last Modified: 27 Nov 2012 07:27
URI: http://aquaticcommons.org/id/eprint/9140

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