Abstract:
The effect of loading density on the growth performance of Oreochromis niloticus in 1.2m^3
fiberglass tubs was studied in the Fatick hatchery in Senegal. The purpose of this study is to
contribute to the improvement of production by optimizing the stocking density. A total of 300
juveniles with an average weight of 42 g were distributed in three densities of 41 individuals /
m^3; 83 individuals / m^3; 125 individuals / m^3 named respectively D50; D100 and D150. Three
days after filling with fertilized water, the tubs were fully ready to receive the subjects. Twentyfour hours after stocking, the fish began to feed on imported granulated feed. They were fed to
satiety. The temperature was constant during our study and its value was 32 +_ 2 'C. Growth
control fishing were conducted every 10 days. At the end of the experiment (40 days later), the
results obtained gave a final average weight of 110 g for D50, 95 g for D100, and 85 g for D150.
The survival rates selected gave the following proportions: 100% for D50, 94% for D100 and
92% for D150. The average weight gains recorded gave 68 g for D50, 53 g for D100 and 43 g for
D150. The D50 and D100 recorded the best growth performance and survival rate. |
