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Dewi Nugrayani
Aquaculture Study Program, Fisheries Department, Faculty of Fisheries and Marine Sciences, Universitas Jenderal Soedirman, Jl. Dr Soeparno, Komplek GOR Soesilo Soedarman, Karangwangkal, Purwokerto Utara, Banyumas, Jawa Tengah 53122
Agriculture, Biological Sciences & Forestry

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EFFECTS OF DIETARY SALT AND HERBAL SUPPLEMENTATION ON HYDROLYTIC BACTERIAL COMMUNITIES IN THE FILTRATION SYSTEM OF BONYLIP BARB (Osteochilus vittatus) Siti Khoirun Nisa; Syafrie Alfauzie; Mevira Sekar Chaerunissa; Hamdan Syakuri; Taufik Budhi Pramono; Dewi Nugrayani; Emyliana Listiowati
Vol 15 No 5 (2025): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v15i5.1782

Abstract

Dietary supplementation with salt and herbal additives may influence not only the gut microbiota of cultured fish but also the bacterial communities in the surrounding water, including filtration systems. This study aimed to characterize the morphotypes and hydrolytic activity of bacteria isolated from the filtration system of Bonylip barb (Osteochilus vittatus) fed diets supplemented with salt and herbal concoctions. A completely randomized design (CRD) was employed with four treatments and three replicates: P1) Control; P2) 3% salt supplementation; P3) 10 mL/kg feed herbal supplementation; and P4) combined 3% salt and 10 mL/kg feed herbal supplementation. After 60 days of culture, bacterial isolates from the filtration system were assessed for colony morphotypes and hydrolytic activity, including proteolytic, amylolytic, cellulolytic, and lipolytic indices. Results indicated that all supplemented treatments (P2–P4) yielded a higher diversity of bacterial morphotypes compared to the control. Notably, proteolytic activity was significantly elevated in the salt-supplemented group (P2) relative to both the control and herbal-only treatments. However, salt and herbal supplementation did not significantly affect amylolytic, cellulolytic, or lipolytic activity indices. These findings suggest that dietary salt influences the functional composition of hydrolytic bacteria in aquaculture filtration systems.
Co-Authors Emyliana Listiowati Hamdan Syakuri Mevira Sekar Chaerunissa Siti Khoirun Nisa Syafrie Alfauzie Taufik Budhi Pramono