Changes between Version 2 and Version 3 of EwEugProduction
 Timestamp:
 20100128 14:51:31 (9 years ago)
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EwEugProduction
v2 v3 13 13 Production rate is the sum of natural mortality (''M = M0'' + ''M2'') and fishing mortality (''F''), i.e., ''Z'' = ''M'' + ''F''. In the absence of catchatage data from an unexploited population, natural mortality for finfish can be estimated from an empirical relationship (Pauly, 1980) linking ''M'', two parameters of the von Bertalanffy Growth Function (VBGF) and mean environmental temperature, i.e., 14 14 15 ../Resources/Images/08000016.png''' Eq. 16''' 15 [[Image(wiki:EwEugImages:08000016.png)]] 16 Eq. 16''' 16 17 17 18 where, ''M'' is the natural mortality (/year), ''K'' is the curvature parameter of the VBGF (/year), ''L'',,''∞'',, is the asymptotic length (total length, cm), and ''Tc'' is the mean habitat (water) temperature, in °C .