Barakuda 45: Jurnal Ilmu Perikanan dan Kelautan

Growth of Red Nile Tilapia (Oreochromis sp.) in Aquaponic Systems Maintained at Different Stocking Densities

Siti Rahma D. Lamalaka — 2026-04-30

Tilapia (Oreochromis niloticus) is a cultivated fishery commodity that has undergone strain development. Among them, red tilapia (Oreochromis sp.) is now an important export product. Red tilapia cultivation faces several major challenges, including limited land availability, insufficient water availability, and poor or suboptimal water quality in the cultivation media. However, these problems can be overcome by applying environmentally friendly aquaponic cultivation methods. The aquaponic system is an integrated cultivation method that combines fish and plants. The system used in this aquaponic cultivation method is the Nutrient Film Technique (NFT), which uses horizontal PVC pipes through which water flows thinly beneath the plant roots. This system is highly efficient for leafy vegetables. This method is efficient in land and water use, and utilizes fish waste as a natural fertilizer for plants. The purpose of this study was to examine the effect of stocking density levels on the growth performance of red tilapia cultivated using the aquaponic method. The research location was the Water Quality and Aquatic Biology Laboratory, Faculty of Animal Husbandry and Fisheries, Tadulako University, Palu. The study used a Completely Randomized Design (CRD) experimental design method, in which the treatment was repeated four times. The treatments tested were variations in the stocking density of red tilapia in an aquaponic system, which were divided into four different levels: A (stocking density of 15 fish/30 L), B (stocking density of 20 fish/30 L), C (stocking density of 25 fish/30 L), and D (stocking density of 30 fish/30 L). The fish were maintained for 52 days. The variables observed in this study included absolute growth, specific growth rate, and survival rate. The observation data were tabulated and then analyzed using the analysis of variance (ANOVA) method with a 95% confidence level. The results of the study concluded that the stocking density of 20 fish/30 L was the best because it produced the largest weight gain 3.63 g, length 1.69 cm, specific growth rate 2.03%/day. However, the best survival rate (85%) was found in the treatment with a stocking density of 15 fish/30 L.

Combination of Household and Plant-Based Wastes as Natural Fertilizers for Rotifer (Brachionus sp.) Biomass Production

Irwan Ismail — 2026-04-30

Rotifers (Brachionus sp.) are widely recognized as a crucial live feed in aquaculture hatcheries, particularly during the early larval stages of fish and shrimp. However, intensive rotifer culture still largely depends on commercial media and inorganic fertilizers, which are relatively costly and may pose environmental risks when used excessively. This study aimed to assess the potential of liquid organic fertilizer (LOF) derived from rice washing water and coconut water as an alternative medium to enhance rotifer biomass production. The experiment was conducted using a Completely Randomized Design (CRD) consisting of four treatments with three replicates, including three LOF concentrations (5, 10, and 15 mL/L) and a control treatment using commercial fertilizer KW21 (1 mL/L). The observed parameters included rotifer population density, specific growth rate (SGR), and water quality over a 10-day culture period. The results indicated that LOF application had a significant effect on rotifer population growth (ANOVA, p < 0.05). The highest population density and SGR were obtained at the 15 mL/L treatment; however, this treatment also exhibited a more rapid population decline during the later culture phase. In contrast, the 10 mL/L treatment showed a more stable growth pattern, maintaining relatively high population density until the end of the culture period, suggesting it as the optimal concentration. Water quality parameters remained within the tolerance range for rotifers (Brachionus sp.), indicating that differences in population growth were primarily influenced by nutrient availability rather than environmental conditions.In conclusion, liquid organic fertilizer based on rice washing water and coconut water demonstrates strong potential as a cost-effective, environmentally friendly, and sustainable alternative medium for rotifer culture, while also supporting the implementation of circular economy principles in aquaculture systems.

Optimization of the Use of Kurisi Fish Flour (Nemipterus japonicus) in Fettuccine to Increase Protein Content

Salsabila Putri Denita — 2026-06-08

The optimization of the utilization of kurisi fish flour (Nemipterus japonicus) in fettuccine aims to enhance nutritional content through protein fortification and evaluate the characteristics and sensory properties of the product. The research was conducted at the Aquatic Product Processing Technology Laboratory, Sultan Ageng Tirtayasa University, using a Completely Randomized Design with four treatments of fish meal concentration (P0 = 0%; P1 = 20%; P2 = 25%; P3 = 30%) and two replications. The analysis of fettuccine includes proximate analysis, sensory analysis, and physical analysis. The research results show that the addition of kurisi fish flour to fettuccine can improve the nutritional content of the product, with a protein content reaching 16.49%. However, the addition of kurisi fish flour in excessively high percentages can decrease the panelists' preference because it produces a more dominant fish taste and aroma in the sensory analysis. Therefore, the addition of kurisi fish flour needs to be optimized so that the increase in nutritional content aligns with the sensory acceptance of the product.

Business and Marketing Analysis of Fresh Fish Sales in Sebulu District, Kutai Kartanegara Regency

Dhea Fadila Aditya — 2026-07-13

Sebulu District, located in Kutai Kartanegara Regency, East Kalimantan Province, is a lowland area traversed by the Mahakam River, which serves as an important transportation route for the local community. The agricultural and livestock sectors are more dominant, while the fisheries sector has not been optimally utilized. Recognizing this opportunity, the communities in Sumber Sari, Mekar Jaya, and Manunggal Daya Villages have developed household-scale fresh fish trading businesses. This study focuses on five enterprises, namely Kios Ikan Putra, Kios Ikan Bang Jarwo, Kios Ikan Bima Galipat, Kios Ikan Nita, and Kios Ikan Bunda Fira, which sell marine fish, freshwater fish, brackish-water fish, and shrimp. The purpose of this study is to analyze the feasibility of fresh fish trading businesses using financial indicators such as Net Profit, Revenue Cost Ratio (R/C Ratio), Return on Investment (ROI), Net Profit Margin (NPM), and Payback Period (PP). In addition, the study identifies marketing institutions and channels, as well as the challenges faced by fresh fish traders. The results show that the five enterprises are financially profitable and feasible to continue, with net profits ranging from IDR 17,898,858.42/month to IDR 113,886,180.56/month. The R/C Ratio ranges between 1.12 and 1.30, ROI values between 8.60% and 49.36%, NPM between 10.96% and 24.57%, and PP between 0.17 years (≈2.03 months) and 0.97 years (≈11.62 months). The marketing is conducted indirectly through a three-level channel, involving producers, collectors, agents, retailers, and consumers. The main challenges faced are limited storage facilities, fluctuating market prices, competition levels, and unstable product quality.