DAILEY and RALSTON: BIOLOGICAL DEVELOPMENT OF HETEROCARPUS LAEVIGATUS 



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F/M A/M J/J 



Time of Year 



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0/N 



Figure 2.— Seasonal incidence of ovigerous Heterocarpus laevigatus females in the 

 Hawaiian Islands. Vertical bars represent 95% confidence intervals and sample sizes 

 are presented above. Site locations vary. 



when the analysis was restricted to mature females 

 only (see next section) the seasonal pattern of egg- 

 bearing was unchanged. From these results we 

 conclude that in Hawaiian waters H. laevigatus 

 reproduces during the fall and winter seasons 

 (August-February). 



The size at maturity of female shrimp was deter- 

 mined by aggregating the female data into 5 mm 

 CL classes and plotting the incidence of ovigerous 

 females against CL class (Fig. 3). Only samples ob- 

 tained during the reproductive season were included 

 in the analysis. As before, the overall percentage 



100 



Carapace Length - mm 



Figure 3.— Size at maturity for female Heterocarpus laevigatus sampled during the 

 reproductive season. Vertical bars represent 95% confidence intervals and sample 

 sizes are presented above. 



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