148 



R. J. H. Beverton and S. J. Holt 



Table I 



COLLECTED DATA ON GROWTH, MORTALITY, LONGEVITY AND 



Notes: (i) Loo and K are the parameters of the growth equation (1) given on p. 157, 

 Lm = mean length at maturity. 



(ii) In a few instances the value of Tmax obtained from the age composition samples 

 longevity of the same or closely related species in captivity, of which a recent sum- 

 ages recorded by Brown are as follows: Gadus virens, 14 years; Melanogrammus 

 Dasyatis pastinaca, 21 years. 



