Background: The purpose of the current study was to determine the growth status, survival and feed utilization of catfish ( Clarias gariepinus BURCHELL, 1822) fed various organic acid supplementations. Methods: In total, 1600 fish were randomly distributed into 20 tanks and fed different types of diet: A, control diet without organic acid supplementation; B, control diet supplemented with 0.05% formic, acetic, and propionic acid; C, control diet supplemented with 0.1% formic, acetic, and propionic acid; D, control diet supplemented with 0.05% butyric acid; E, control diet supplemented with 0.01% butyric acid. The control diet was a commercial diet, containing 35% crude protein, 8.58% crude fat, and 2.75% fibre. All fish were fed using a satiation method, three times per day for 56 days. At the end of the trial, growth, survival and feed utilization were determined. Water quality parameters during the trial were also measured once a week. Results: Fish fed diet type D had the significantly lowest ( P<0.05) final weight (FW), weight gain (WG), and specific growth rate (SGR) of all diets. Similar FW, WG, and SGR were found for fish fed diets A-C and E. Meanwhile, the feed conversion ratio, feed efficiency, and survival rate of fish were not affected by any types of diet. The water quality parameters were not significantly different between tanks and weeks: dissolved oxygen 6.79-6.81 mg L -1, pH 7.11-7.19, water temperature 28.97-29.32°C, nitrite (NO 2) content 0.48- 0.50 mg L -1, and ammonia (NH 3) content 0.064-0.066 mg L -1. Conclusion: The supplementation of 0.05% butyric acid in the diet of C. gariepinus for 56 days reduced the growth performance of the fish. However, supplementation of an organic acid in the diet of C. gariepinus had no impact on feed utilization, survival, and water quality parameters.
The present research was performed to determine the relative growth rate (RGR), condition factor (K) and cannibalism ratio (CR) of Catfish (Clarias gariepinus Burchell, 1822) fed different level and types of organic acid addition in the fish. Eighty fish were randomly assigned into five group triplicates, reared, and fed different type organic acid supplemented viz: control diet with no organic acid addition (B1); mixture of formic, acetic and propionic acid at level 0.05% (B2); mixture of formic, acetic and propionic acid at level 0.1% (B3); 0.05% butyric acid (B4); 0.1% butyric acid (B5), for 8 weeks. At the end of the 8th week, RGR, K, and CR were determined. Fish fed 0.1% mix of formic, acetic and propionic acid or 0.1% butyric acid in the diet had the significantly higher (p<0.05) RGR than control or other groups. Meanwhile, the K and CR of fish during the trial were not affected by any various and levels of the organic acid. In conclusion, the supplementation of 0.1% mix organic acid or 0.1% butyric acid in the diet of C. gariepinus for 8 weeks enhanced the RGR of the catfish but no effect on the condition factor and cannibalism ratio.
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