Longevity and Mortality Rates of Fish in Nature 149 



SIZE AT MATURITY OF FISH IN NATURAL POPULATIONS 



M = natural mortality coefficient, Tmax = maximum age recorded in samples, 



(indicated by an asterisk) is somewhat below that recorded from records of the 

 mary has been compiled by Brown (1957). For the fish in question, the maximum 

 aeglefimis, 14^15 years; Salmo trutta, 18 years and more; Anguilla anguilla, 55 years; 



