The Addition of Black Soldier Fly (Hermetia illucens) Frass as Natural Fish Feed Fertilizer | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Volume 29, Issue 5, September and October 2025, Pages 509-522 PDF (682.73 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2025.344583.5119 | ||
| Authors | ||
| Herliwati Herliwati* 1; Mijani Rahman2; Ahmadi Ahmadi3 | ||
| 1Department of Aquaculture, Fisheries and Marine Faculty, Lambung Mangkurat University | ||
| 2Department or Aquatic resources, Fisheries and Marine Faculty, Lambung Mangkurat University | ||
| 3Faculty of Fisheries and Marine Science, Lambung Mangkurat University Banjarbaru, South Kalimantan, Indonesia. | ||
| Abstract | ||
| High mortality is the main challenge in fish breeding during the larval–juvenile phase. A common solution has been the use of commercial natural feed products; however, these are often too expensive to be economically feasible. Black soldier fly frass (BSF frass), produced through the bioconversion of household waste, is nutrient-rich, low-cost, and environmentally friendly. It has strong potential as a fertilizer to stimulate the growth of natural feed for aquaculture. This study aimed to analyze the abundance and diversity of natural feed (phytoplankton) following the addition of BSF frass as a fertilizer. The experiment was conducted at the Mandiangin Freshwater Aquaculture Center, Banjar Regency, using a completely randomized design with three fertilizer treatments: A (100% quail excreta), B (50% quail excreta + 50% BSF frass), and C (100% BSF frass). The results showed that BSF frass fertilizer induced phytoplankton growth. Phytoplankton from the phyla Chlorophyta and Chrysophyta were observed in treatments A and C, while treatment B supported the growth of Cyanophyta, Chlorophyta, and Chrysophyta. Phytoplankton abundance in treatment B (50% BSF frass) increased significantly on the 5th day, from 295 cells·L⁻¹ to 2,020 cells·L⁻¹. The combined fertilizer of 50% quail excreta and 50% BSF frass promoted a more diverse and abundant phytoplankton community, with a greater variety of species and more even distribution. Thus, the addition of BSF frass fertilizer can enhance phytoplankton growth, providing a natural feed source that is applicable for aquaculture practices. | ||
| Keywords | ||
| organic fertilizer; phytoplankton; larva-juvenile; black soldier fly; natural feed | ||
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