Document Type : Original Article
Authors
1
Departement of Aquaculture, Faculty of Fisheries and Marine Science, Bung Hatta University, Padang 25131, Indonesia
2
Master’s Degree Program in Aquatic, Coastal, and Marine Resources Management, Faculty of Fisheries and Marine Science, Bung Hatta University, Padang 25131, Indonesia
10.21608/ejabf.2025.430311.6734
Abstract
The study was conducted to analyze the effects of supplementing artificial diets with cattle rumen probiotics at different dosages on the growth performance of giant gourami fingerlings (Osphronemus goramy Lac) over a 60-day rearing period. A completely randomized design (CRD) was employed, consisting of five treatments with five replicates each. Microbial identification revealed that cattle rumen contained Bacillus sp. as the dominant bacterium with probiotic potential, whereas Listeria sp. was only sporadically present and exhibited pathogenic characteristics, thus requiring caution. Proximate analysis indicated that cattle rumen had a high moisture content (94.97%), along with protein (0.64%), lipid (0.14%), carbohydrate (3.07%), and ash (1.18%). These results suggest that rumen material constitutes a nutrient-rich substrate that supports the proliferation of fermentative microbes. Furthermore, amino acid profiling demonstrated the presence of essential amino acids such as leucine (2.54%), methionine (2.00%), proline (2.21%), alanine (1.71%), and glutamate (1.21%), which play important roles in enhancing probiotic performance as well as serving as nutritional sources for fish. The highest absolute weight gain was observed in treatment E, with an average of 124.83 ± 5.53ᶜ. The greatest absolute length gain was recorded in treatment D, with an average of 0.63 ± 0.07ᵃ. The highest mean specific growth rate (SGR) was also obtained in treatment E, averaging 2.70 ± 0.09ᶜ. In contrast, the highest survival rate was achieved in treatment A, with an average of 94.44 ± 1.92ᵃ. Overall, the results indicate that the optimal growth performance of giant gourami fingerlings was obtained when artificial diets were supplemented with cattle rumen probiotics at a dosage of 50mL/ kg feed, while the lowest performance was observed in the control treatment without probiotic supplementation (0mL/ kg feed).
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