World Aquaculture Safari 2025

June 24 - 27, 2025

Kampala, Uganda

GROWTH AND SURVIVAL RATE OF CATFISH Clarias gariepinus FRY FED ON KENYAN-PRODUCED AND IMPORTED ARTEMIA WITH SUBSEQUENT WEANING OF DRY FEEDS

Sylvia, T1., Mukami, M. N., Opiyo, M., Hinzano, M.S.,

Kenya Marine and Fisheries Research Institute

P. O. Box 81651-80100

1Corresponding author Email: traceysylvia1@gmail.com

 



Culture of fish fry is highly dependent on live feeds. In Kenya, hatchery owners and fish farmers use phytoplankton or Artemia as their main live feeds. Phytoplankton is collected in pond water while Artemia is imported or produced locally. Complaints of low survival rates of fry from farmers and hatcheries using imported Artemia necessitated this study. A 21-day experiment was conducted to evaluate the growth and survival rate of Clarias gariepinus fry fed on Kenyan produced and imported Artemia cysts. The experiment was conducted in twelve (12) glass aquaria (60cm*30cm*30cm) filled to a capacity of 30 L randomly placed at the hatchery. Four hundred and fifty C. gariepinus fry of approximately 0.02gms and 6mm were counted randomly and introduced in each aquaria at a stocking density of 15 fry/l. The fry were fed exclusively on Artemia diet from day 2 to 8 of the experimental period. On day 9 to 11, the fry were co-fed on Artemia and dry feed to prepare them for the starter diet which was a dry feed. After the three days, the dry feed was introduced from the 12th day to the end of the experiment. The feeds were administered three times a day at a four-hour interval at 09.00, 13.00 and 17.00 hours. Results indicate that water quality variations had minimal influence on the growth and survival of Artemia. On the other hand, there were no significant differences in body length among treatments. However, there was a significant difference in body weight on day 7 among the treatments. A significantly higher survival rate (p < 0.05) was observed in larvae fed on the decapsulated Shell Free Artemia 21 days compared to the other two encapsulated treatments. Growth results demonstrate that 7 days of live feeding is sufficient for efficient rearing of catfish larvae. The decapsulated Artemia is having had better growth recommended for a higher survival rate of fish fry. It is also recommended that other factors be explored in future experiments such as nutrition and the feeding rates of Artemia on fish fry.