EVERSON ET AL.: MATURATION AND REPRODUCTION IN TWO HAWAIIAN SNAPPERS 



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n 11 6 ■^'^ 3 -yW 34 2 26 23 18 'c>'^ 



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DEVELOPING 



IMMATURE 



Figure 4. — Monthly percentages of uku and onaga ovaries at various stages of development determined by visual 



staging methods. A' = number of samples per month. 



500 mm size class, 100% were mature. The small- 

 est uku with vitellogenic (stage II) ovaries dur- 

 ing the spawning season was 429 mm FL (1.27 

 kg), which is 41.7% of the maximum length 



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(MAXLEN) recorded for the study animals. The 

 smallest individual with ripe (stage III) ovaries 

 was 477 mm FL (1.82 kg) or 46.4% of the 

 MAXLEN. The predicted value of L50 obtained 

 from the logistic fit of percentage mature on FL 

 (Fig. 6) was 449 mm FL (a = -0.3444, b = 



FORK LENGTH (mm) 



FORK LENGTH (mm) 



Figure 5. — Mean gonosomatic inde.x (GSI) plotted by 50 mm 

 FL intervals for female uku and onaga sampled during their 

 respective spawning seasons. 



Figure 6. — Proportion of se.xually mature female uku and 

 onaga w^ithin each size class, plotted with the predicted pro- 

 portion of mature females. 



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