Résumé
Efforts to alleviate the conflicting competition between humans, fish and livestock feed industries for orthodox feedstuffs and to maximize aquaculture profitability have led to considering cheaper and locally available alternatives. This 56-day study was conducted to appraise the nutritional and growth-enhancing potential of boiled fenugreek (Trigonella foenum-graecum) seed meal (FSM) as an additive in the practical diet of 270 Clarias gariepinus fingerlings (weight: 7.14 - 7.19 ± 0.25 g; length: 5.2 – 5.5 ± 0.53 cm). Boiled fenugreek seed meal was incorporated into diets at 0 (control), 10, 20, 30, 40 and 50%. Fish fed with control diet had the highest (42.24 g) values of MWG, SGR (0.39%/day) and least (0.64) feed conversion ratio, followed by those fed with 20% FSM having MWG (37.07 g), SGR (0.27%/day) and FCR (0.65) while the fish fed with 50% FSM had the least MWG (29.38 g), SGR (0.08%/day) and highest FCR (0.68) respectively. Mean carcass crude protein (50.70 – 64.80%) significantly (p<0.05) exceeded the initial value (48.85%). Growth and feed utilization indices steadily decreased with increase in the levels of fenugreek seed meal in the diets. This study revealed that up to 20% supplementation of boiled fenugreek seed meal as an additive in the diet of C. gariepinus could effectively improve growth performance and feed utilization.
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