|
Effects of stocking density on growth performance of hybrid catfish (Clarias macrocephalus x C. gariepinus) in a smart recirculating aquaculture system using black soldier fly larvae as fishmeal replacement |
|---|---|
| รหัสดีโอไอ | |
| Creator | Dome Adoonsook |
| Title | Effects of stocking density on growth performance of hybrid catfish (Clarias macrocephalus x C. gariepinus) in a smart recirculating aquaculture system using black soldier fly larvae as fishmeal replacement |
| Contributor | Teppitag Boonta, Jomsuda Duangwongsa, Prasert Prasongphol, Daracha Thiammueang |
| Publisher | Faculty of Agriculture |
| Publication Year | 2568 |
| Journal Title | Khon Kaen Agriculture Journal |
| Journal Vol. | 53 |
| Journal No. | 6 |
| Page no. | 1140-1155 |
| Keyword | hybrid catfish, recirculating aquaculture system (RAS), black soldier fly larvae, stocking density, water quality |
| URL Website | https://li01.tci-thaijo.org/index.php/agkasetkaj |
| Website title | Khon Kaen Agriculture Journal |
| ISSN | 3027-6497 (Online) |
| Abstract | This study investigated the effects of different stocking densities on the growth performance of hybrid catfish (Clarias macrocephalus × C. gariepinus) in a smart recirculating aquaculture system (Smart RAS), using black soldier fly larvae (Hermetia illucens) as a 75% replacement for fishmeal. The experiment was conducted with three stocking densities of 50, 100, and 150 fish/m² in a 5 m³ culture tank equipped with physical filtration (Drum filter), biological filtration (MBBR), and UV sterilization, controlled by a PLC integrated with IoT technology. Results indicated that final average weights (325.56±9.75 and 322.98±12.63 g/fish) and specific growth rates (4.78±0.03%/day) of catfish stocked at 50 and 100 fish/m² were not significantly different (P>0.05), but were significantly higher than those stocked at 150 fish/m² (282.49±4.29 g/fish and 4.66±0.01%/day, respectively; P<0.05). Survival rates at densities of 50 and 100 fish/m² (91.56±3.36% and 88.33±3.93%, respectively) were significantly higher (P<0.05) compared to the 150 fish/m² group (75.26±6.80%). Throughout the study period, the automated control system effectively maintained water quality parameters, with dissolved oxygen (DO) between 3.72–4.27 mg/L, pH between 7.11–7.56, and total ammonia nitrogen (TAN) between 0.36–0.45 mg/L. Economic analysis revealed that the stocking density of 100 fish/m² provided the highest return on investment (ROI) at 53.55%. Thus, stocking hybrid catfish at 100 fish/m² in a smart RAS using black soldier fly larvae to replace 75% of fishmeal is recommended, as it maximizes production, maintains optimal water quality, achieves the best feed utilization efficiency, and offers the highest economic returns. |
