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Main Article Content
Growth Response of Heterobranchus longifilis juveniles Fed Leucena leucocephala Leaf Meal Supplemented diets as Replacement for Soyabean
Abstract
It is important to explore alternative protein-rich resources to supplement traditional feed sources so as to lower feeding costs. Leucaena leaf meal (LLM) stands out as a viable option, sourced from the plant Leucaena leucocephala. L. leucocephala leaves are available year-round and can be gathered at minimal expense. This study conducted a 56-day feeding trial to assess the growth response of Heterobranchus longifilis juveniles (22.33-28.6g) fed varying levels of Leucaena leaf meal to replace soyabean. The Leucaena leaves were prepared by soaking in water for three days, followed by sun-drying. Experimental diets were formulated using a completely randomized design with five treatments: 0% (SWC), 10% (SW10), 20% (SW20), 30% (SW30), and 40% (SW40) Leucaena leaf meal. Results showed that fishes fed with 30% Leucaena leaf meal (SW30) exhibited the highest mean weight gain (MWG) of 25.47g±6.08, while those on the control diet (SWC) displayed the lowest MWG of 12.47 ± 2.77. Significant differences (P≤0.05) were observed among treatments for MWG, protein efficiency ratio (PER) and specific growth rate (SGR). Furthermore, carcass analysis revealed significant variations, with protein content being notably higher in fish fed with diet SW30 (46.35±0.99%) compared to those on diets SWC and SW10 (43.89±0.50%). This research underscores the potential of Leucaena leaf meal to partially replace soybean meal at a 30% inclusion level, in the diet of H. longifilis juveniles.
