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Abstract
The response of catfish fed differently timed wet-heat-treated sesame seedmeal was evaluated in the diet of Clarias gariepinus using growth performance, nutrient utilisation and apparent digesti-bility coefficient as indices. Three batches of sesame seed, which were cooked for 10, 20 and 30 minutes, dried, milled, and mechanically defatted using locally made screw press. Each of these differently processed seedmeals was included in the diet of African catfish at varying replacement levels, 15, 30 and 45% with soybean meal. There was good growth performance and nutrient uti-lization by Clarias gariepinus fed with differently timed wet-heat-treated sesame seed that was not significantly different (p > 0.05) from fish fed control diet. More so, the apparent digestibility coef-ficient for organic matter, protein, energy, lipid, fibre, carbohydrate in Clarias gariepinus fed with differently timed wet-heat-treated sesame seedmeal based diets in this study were comparable with the results obtained for fish fed control diets.
Highlights
Nutrition plays a critical role in intensive aquaculture as it influences the production cost and fish growth, health and waste production [1]
Comparable performance in growth, nutrient utilization and carcass crude protein deposition in Clarias gariepinus fed diets with processed sesame seedmeal based diets showed that the nutritive value of raw sesame seedmeal could be improved by cooking
This is evidenced in more superior growth performance and nutrient utilization of Clarias gariepinus fed differently cooked sesame seedmeal even at higher replacement level than those fed raw [23] at level to level comparison. [35] reported good growth performance that was not significantly different from control was recorded when Clarias gariepinus was fed diets containing autoclaved nor roasted winged bean (Psophocarpus tetragonolobus) replacing up to 80% of fishmeal
Summary
Nutrition plays a critical role in intensive aquaculture as it influences the production cost and fish growth, health and waste production [1]. Wider utilization and availability of this conventional source for fish feed is limited by increasing demand for human consumption and by other animal feed industries [6] This phenomenon according to [7] has hindered the expansion and profitability of aquaculture enterprise in many developing countries and has to encourage the need to look for cheaper alternative protein source for the development of low-cost feed that can replace this conventional feedstuff without reducing the nutritional quality of the diets. Sesame seed (Sesamum indicum) is one of the important annual crops of the world grown for oil They have nutrient density comparable to other oilseed proteins including soybean meal and other conventional legumes [17]-[19] and their potentials as dietary protein sources are well recognized [20] [21]. This study investigates the replacement value of differently timed wetheat-treated sesame seedmeal with soybean meal in the diet of Clarias gariepinus using growth performance, digestibility and nutrient utilisation as indices
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