Feasibility of Sand Lobsters Rearing in Floating Net Cages with Different Depths, Number of Shelters, and Stocking Densities | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 33, Volume 29, Issue 1, January and February 2025, Page 583-611 PDF (882.19 K) | ||||
| DOI: 10.21608/ejabf.2025.405950 | ||||
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| Author | ||||
| Effendi et al. | ||||
| Abstract | ||||
| Lobster cultivation can enhance productivity by adjusting the environment to match its natural habitat, such as depth, shelter to protect against cannibalism, and stocking density. This study aimed to analyze the production performance and feasibility of sand lobsters reared in floating net cages at varying depths, shelter numbers, and stocking densities. The research was conducted on Kelapa Dua Island, Seribu Islands, DKI Jakarta, and included three experiments using a completely randomized design (CRD) with three treatments and three replications for each treatment. The first experiment evaluated depths of 1, 2, and 3m. The second experiment tested shelter configurations with no shelters (0:8), a shelter-to-lobster ratio of 1:2 (4 shelter units/m²), and a ratio of 1:1 (8 shelter units/m²). The third experiment focused on stocking densities of 8, 12, and 16 lobsters/m². The results showed that depth significantly influences the production performance of sand lobster cultivation. A depth of 2 meters produced the best survival rates and commercial benefits, making it the most effective depth for floating net cage lobster farming. However, all depth treatments were financially unfeasible. The highest survival rate of 100% was achieved when using polyvinyl chloride (PVC) pipe shelters at a density of 4 units/m² (shelter-to-lobster ratio of 1:2). Although shelters improved survival rates, they did not significantly affect the lobster's weight gain rate, length gain rate, or feed conversion ratio. Nonetheless, shelters provided greater commercial benefits compared to other treatments, making them an attractive option for investment. Increasing stocking density to 16 lobsters/m² remained economically feasible despite a 20% decline in production, highlighting its potential to enhance investment sustainability. | ||||
| Keywords | ||||
| Business feasibility; Depth; Floating net cage; Number of shelters; Sand lobster; Stocking densities | ||||
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