225 



200 



175 



^150 



< 



q: 125 



100 



75 



50 



25 



' 



10 12 14 



AGE ( YEARS 



16 18 20 22 



Figure 3.— The Gompertz curve fitted to weight-at-age data for the Pacific sardine following expression 

 (2b) in text; u\ = 93 g., G = 0.825, g = 0.445, and (r = 2 years. 



2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 



Figure 4. — Computer curves of P, as a function of (t-tr)', growth data from the California sardine, according 

 to expre.ssion (4) in text, \alues of constants are: li = 1,000 fish, »v = 93 g., R^ = 93 kg., O = 0.825, 

 g = 0.445. 



38 



U.S. FISH AND WILDLIFE SERVICE 



