358 



Fishery Bulletin 90(2), 1992 



C. AREL: MALE 



C. LIDA: MALE 



UJ 



Z) 



I- 

 < 



fK3-0-Q-0-D-0-D-e-9 



N: 718 



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SIZE GROUPS (TL in mm) 



C. AREL: FEMALE 



SIZE GROUPS (TL in mm) 



C. LIDA: FEMALE 



N: 569 



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SIZE GROUPS (TL in mm) 



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SIZE GROUPS (TL in mm) 



Figure 15 



Size-at-first-maturity in male and female Cynoglossus arel and C. lida caught commercially off 

 Porto Novo, India, October 1981-September 1982. 



Age-at-flrst-maturlty In their first year, males of 

 C. arel grow to 180 mm according to the Petersen 

 method, and to 194 mm according to the probability plot 

 method and von Bertalanffy's equation (Rajaguru 

 1987). Female C. arel reached 201 mm as per the prob- 

 ability plot method and von Bertalanffy's equation, and 

 210 mm according to the Petersen method, at the end 

 of their first year of life (Rajaguru 1987). Hence it 

 appears that 50% of male and female C. arel attain first 

 maturity at the beginning of their second year of life. 

 Male C. lida, at the end of their first year of life, 



would grow to 151-154 mm based on all three methods 

 (Rajaguru 1987). Females of C. lida reach 153 mm 

 according to von Bertalanffy's equation and the prob- 

 ability plot method, and 156 mm according to the 

 Petersen method, at the end of the first year of their 

 life (Rajaguru 1987). Therefore, 50% of male and 

 female C. lida attain first sexual maturity during the 

 second year of their life. 



Fecundity Fecundity varied from 14,972 to 127,001 

 eggs/ovary in C. arel, and 11,267 to 81,004 eggs/ovary 



