Andi Masriah, St. Zaenab, Soraya Ramadani, Nurfadilah, Nurilmi Achmad
Nutritional quality of fish feed remains a major challenge in aquaculture, particularly in balancing protein content and feed efficiency while reducing dependence on expensive commercial ingredients. Liquid bioslurry, a by-product of biogas production, has the potential to be used as a sustainable feed additive to improve nutritional quality due to its probiotic content. This study aimed to evaluate the effect of various concentrations of liquid bioslurry on the proximate composition of fish feed. The study was designed using a Completely Randomized Design (CRD) consisting of four treatments (20, 30, 40, and 50 % (v/w) of feed) and three replicates. The results of the analysis of variance showed that an increase in bioslurry concentration had a significant effect (P<0.05) on the nutrient content of the feed. Higher concentrations increased the moisture, ash, protein, and nitrogen-free extract (NFE) content, while the crude fiber content decreased. The highest fat content was obtained at a concentration of 40 % (v/w) of feed before decreasing at higher concentrations. This study shows that the 50 % (v/w) of feed is the optimal dose for improving feed nutritional quality, particularly through increased protein and NFE and decreased crude fiber. The use of liquid bioslurry as a fish feed additive is still relatively limited, so this study provides a new contribution to the field of aquaculture feed nutrition. The results of this study have practical implications for the formulation of more economical and environmentally friendly aquaculture feed. © 2025, Egyptian Society for the Development of Fisheries and Human Health. All rights reserved.
PSDKU Aquaculture, Faculty of Fisheries and Marine Science, Brawijaya University, East Java, Kediri, 64111, Indonesia; Study Program of Aquaculture, Faculty of Fisheries, Cokroaminoto Makassar University, Jl. Perintis Kemerdekaan KM.11, South Sulawesi, Makassar, 90245, Indonesia; Study Program of Capture Fisheries, Werisar University, Campus Complex 1, South Sorong Regency, West Papua Province, Keyen Village, 98216, Indonesia
