The Effect of Saccharomyces cerevisiae in Commercial Feed on Feed Utilization Efficiency, Growth Performance, and Blood Profile of Freshwater Pomfret (Colossoma macropomum) Fingerlings

The objective of this study was to evaluate the effects of adding Saccharomyces cerevisiae to commercial feed on feed utilization efficiency, growth performance, and blood profile of freshwater pomfret (Colossoma macropomum) fingerlings. The test fish used were freshwater pomfret fingerlings with an average weight of 4.36±0.28 g. The study was conducted using an experimental method with a Completely Randomized Design (CRD), consisting of 5 treatments and 3 replications. The treatments included the addition of S. cerevisiae to commercial feed at levels of A (0 g/kg feed), B (2 g/kg feed), C (4 g/kg feed), and D (6 g/kg feed). The observed variables included feed utilization efficiency (FUE), feed conversion ratio (FCR), protein efficiency ratio (PER), relative growth rate (RGR), survival rate (SR), and blood profile (total blood cells, red blood cells, white blood cells, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), and mean corpuscular hemoglobin concentration (MCHC), calculated using red blood cell count, hemoglobin level, and hematocrit).The study results indicated that the addition of S. cerevisiae to commercial feed significantly improved feed utilization efficiency, growth performance, and blood profiles (including red blood cell count, white blood cell count, and hematocrit value) of freshwater pomfret fingerlings. The optimal dose of S. cerevisiae in the feed for maximizing feed utilization efficiency in freshwater pomfret fingerlings was between 3.45–3.51 g/kg of feed, yielding a maximum feed utilization efficiency (FUE) of 68.37% and relative growth rate (RGR) of 3.28% per day.