Comparative growth and performance of two generations of tilapia (Oreochromis niloticus)

The growth of generations the Genomar Supreme Tilapia (GST) strain, specifically G20 and G25, was evaluated. Tilapias 8 g were reared in a recirculating aquaculture system with 0.25 m³ tanks, 80 fish m-³, four replicates. During growth, eight from each tank weighed measured at day 1, 30, 60, 90, 120, 150, 180 210. Survival, weight gain, feed conversion batch homogeneity determined. Weight-age data fit to Gompertz model. In addition, absolute relative rates age inflection Final showed 26.7% higher G25 when compared (920.05 725.87 g, respectively). indexes better than G20. estimate asymptotic (1202.0 g) (912.7 g). presented smaller (335.76 g), (108.87 days) rate (4.87 day-1) (442.19 113.77 days 6.41 day-1). Carcass characteristics similar, but about 25% fillet After five years GST breeding program, results indicated that sustained improvement harvest achieved, as well 6 10% gain performance by generation.