HEPHERD AND GRIMES: GROWTH VARIATIONS IN WEAKFISH 



TABLE 1.— Mean back-calculated lengths at age of weakfish, Cynoscion regalis, by sex and 

 region with the grand mean weighted by n. 



TABLE 2. — Results of Duncan's new multiple range 

 test, including probability values, comparing mean 

 back-calculated lengths at age of weakfish, Cynoscion 

 regalis, between regions. Connecting bars indicate no 

 significant differences (P> 0.05); N is given in paren- 

 theses. 



occurred in the first year for both sexes (Table 3). 

 Growth of weakfish from Region III was highest at 22 

 cm, while Regions I and II to the north each averaged 

 20 cm in the first year. Growth rate in Region III 

 declined steadily after the first year. Growth in 

 Regions I and II decreased in the second year to 10 

 and 7 cm, but increased to 14 and 9 cm during the 

 third year. Thereafter growth rate declined, reaching 

 a low of 2 cm in the 11th year for Region I and 4 cm in 

 the 5th year for Region II. 



Initial growth in weight was slower than length 

 (Table 4). Back-calculated lengths at age were con- 

 verted to weight using the GM functional regression 

 (Rickerl973): 



807 



