Abstract:
In catfish hatchery facilities, 15 circular plastic tanks 100L volume were stocked with C.
gariepinus fry (0.533+_0.03 g) at five densities of T1 (20), T2 (40), T3 (60), T4 (80) and T5 (100)
fry/L. 15% body weight 4 times a day commercial fry feed (45% crude protein; crude fiber 6.2%;
fats content 8.8%; ash content 8.1% and 22.76 KJ GE/100 g) were added daily for 42 days. By
continues flow, water quality parameters was adjusted at the ranged of 26-28.3 0C, 6.8-3.3 mg/L,
6.5-8.0 and 0.05 - 0.18 mg/L for temperature, dissolved oxygen, pH and total ammonia
respectively. The result showed that water quality, growth parameters and survival rate was
density dependence. Final weight, weight gain, daily weight gain, RGR, PER and survival rate
were significantly (p<0.05) stocking density dependent. FCR was significantly (p<0.05) increase
with the increasing stocking density of fry. The best growth performances and survival rate were
recorded in lower stocking density T1 (20fry/L) while the lowest was in high stocking level T5
(100fry/L). The result also showed that to achieve better growth and best survival for
maximizing the production of C. gariepinus 40 fry/L in plastic tanks with conditioning of
continues water flow under good quality commercial diet were applied. |
