43 Weeks 



Fig. 15 (a). — Growth in length (mm.) of male fish of the genera Xipho- 



phorusy Lebistes and Heterandria during the first year of life. Sexual maturity is 



indicated by 6* (from Wellensieck, 1953). 



44 48 weeks 



Fig. 15 (b). — Growth in length of female fish of the genera Xiphophorus y 



Lebistes and Heterandria during the first year of life. Sexual maturity is 



indicated by '$ (Wellensieck, 1953). 



