REPRODUCTIVE PERIODICITY, FECUNDITY, SEX RATIO AND PARENTAL CARE OF ANGELFISH PTEROPHYLLUM SCALARE (PERCIFORMES: CICHLIDAE) UNDER LABORATORY CONDITION

Abstract

The present study showed that Pterophyllum scalare breeds within April to May i.e. in summer season in freshwater and laboratory condition. It is a single breeder and highest percentage of gravid female occurs in May (90.91%). Five stages of maturity of ova include immature 0.23±0.08, maturing 0.54±0.11, mature 0.88±0.10, ripe 1.64±0.09 and spent 0.44±0.12. The GSI and GLI ranged from 2.36 to 6.24 and 9.92 to 18.50 respectively. The mature and ripe ova occur April to July, the mean and s.d. in April, May, June and July were 1.66±0.05, 1.59±0.06, 1.47±0.08 and 1.39±0.077 respectively. The relationship between fecundity and total length; fecundity and body weight and fecundity and ovary length were y = 0.003x+99.40; y = 0.005x+11.42 and y = 0.002x+15.97 respectively.