Length-weight Relationship and Condition Factor of Red Tilapia (Hybrid) Reared in Cemented Tanks of Sun-bright Red Tilapia and Ornamental Hatchery-Karachi, Sindh-Pakistan

Abstract

Length-weight relationship (LWR) and condition factor (K) were estimated for the Red tilapia (hybrid) brooders collected from cemented tanks (11x7x4 feet of Sun-bright Red Tilapia and Ornamental Hatchery, Karachi-Pakistan. The female brooders (average length 16.2 ± 2.4 cm and weight 133.9 ± 15.6 g) and male brooders (average length 16.48 ± 1.9 cm and weight 143.42 ± 11.4 g) were randomly sampled from brood-stock maturation tank. Log transformed regression was used to test the growth of the specimens (n=177). It was observed that value of the regression co-efficient ‘b’ was found to be 1.20 for female and 1.36 for male showing an isometric growth among the brooders. There was no significant (P<0.05) difference in K of both sexes. On the basis of length-weight and condition factor data, it is concluded that Red tilapia brood-stock were in good condition for mass seed production purposes.