• Udo. Imefon Udo
• Christopher, Bassey, Ndome
• Ijokgwung, D. P.

As the culture of Heterobranchus longifilis becomes more intensive, there is need to determine the optimum feeding level for its production as sufficient consumption of feed is essential for increased yield and profitability. This research therefore aimed at determining the effect of different feeding levels on the production of H. longifilis with the views to establishing the best feeding level. Ninety (10 per tank) H. longifilis (10.65 ± 0.23 g) were fed at four feeding levels (5%, 15%, 25% and 35% fresh body weight) with Coppen for 56 days and designated as A1, A2, A3 and A4 respectively. These were replicated thrice. Fish growth parameters measured showed that fish fed 5% of their fresh body weight had best result in weight gain (8.61 ± 0.11), specific growth rate (SGR) (1.35 ± 0.23) and mean growth rate (MGR) (10.61 ± 0.1) and these were significantly different (P<0.05) from fish fed at other feeding levels. Food utilization indices also favoured fish fed at 5% of their body weight. Feed conversion ratio (FCR) (0.32 ± 0.01) and feed conversion efficiency (FCE) (359.01 ± 53.35) were also better in A1. Heterobranchus longifilis is commonly produced in Nigeria because of its fast growth rate and profitability. Efficient production and growth depend on feeding the best possible diets at levels not exceeding 5% fresh body weight.

Overfeeding, starvation, optimum, nutrient, profitability, yield

"Effect of Different Feeding Levels on the Production of Heterobranchus longifilis Raised in Indoor Aquarium Tanks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 10, page no.632-638, October-2018, Available :http://www.jetir.org/papers/JETIR1810199.pdf

"Effect of Different Feeding Levels on the Production of Heterobranchus longifilis Raised in Indoor Aquarium Tanks ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 10, page no. pp632-638, October-2018, Available at : http://www.jetir.org/papers/JETIR1810199.pdf