FISHERY BULLETIN: VOL. 86, NO. 2 



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SEPTEMBER 

 DATE 



OCTOBER 



Figure 3. — Seasonal changes in weight of Atlantic salmon postsmolts coUecteci in 1982 and 1983. 



males. Though the size of ovaries did not differ 

 significantly between age groups (P = 0.07), go- 

 nadosomatic index values increased in older fe- 

 male postsmolts (P = 0.0006). Mean values 

 ranged from 133 mg (0.06%) for 2-yr-old post- 

 smolts to 205 mg (0.10%) for 5-yr-old postsmolts 

 (Table 3). The regressions of ovary weight on body 

 length, body weight, and time were all significant 

 except for 5-yr-old females (Table 4), and differed 

 between age groups particularly in elevation 

 (P < 0.05, n - 213). The regressions of gonadoso- 

 matic index values on the same variables were 



Table 3. — Gonad weight (mg) and gonadosomatic index (GSI) (%) 

 of Atlantic salmon female postsmolts: mean values and confidence 

 limits (n = 213). 



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