Influence of Baker’s Yeast and Aspergillus oryzae on Growth and Microbial Composition of Silver Carp (Hypophthalmichthys molitrix)
DOI:
https://doi.org/10.64614/vzs-16Keywords:
Aspergillus oryzae, bacterial counting, baker’s yeast, growth performance, immunomodulation, fish feedAbstract
This research was conducted to evaluate the growth performance and microbial composition of Hypophthalmichthys molitrix (H. molitrix) after baker’s Yeast (Saccharomyces cerevisiae) and Koji Mold (Aspergillus oryzae) administration. Both of these feeds contain good levels of beta-glucans and are used for their immunostimulatory effects. A. oryzae is an important source of organic compounds, such as glutamic acid, glucoamylase, and proteases. The cellular content of yeast contain proteins, glucans, and minerals that can enhance the growth of fish. About 60 fingerlings were taken and divided into 3 experimental groups with randomized placements to ensure unbiased results. The experimental groups were fed at 2% body weight with baker’s yeast (T1), A. oryzae (T2), and control group with 100% commercial feed (T0) during the 8-week trial period. For growth estimation, the length and weight of fish were measured weekly. After completion of trial fish weight gain (WG), specific growth rate (SGR), survival rate, and feed conversion ratio (FCR) were measured. The statistical results collected from treatments were compared by using a single-factor ANOVA under Tukey test. There was significant increase in T1 and T2 growth indicators as T0<T1 <T2 with p<0.05. Also, samples were collected from gills and intestine of fish for microbial evaluation, and analysis were performed on nutrient agar (NA) media. In comparison to T0, the bacterial count in T1 and T2 treatment was less, resultantly. The results highlighted the potential of baker’s yeast and A. oryzae as feed supplements, providing encouraging opportunities for enhancing fish overall health and efficiency.
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Copyright (c) 2025 Orba Maan, Shakeela Parveen, Fayyaz Rasool, Arooj Haneef, Aqsa Ameen, Muhammad Haroon, Ifrah Mustafa, Areeha Fatima, Farwa Batool, Naila Mukhtar
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