Abstract
AbstractObjectiveThe spiny sand lobster Panulirus homarus is one of the lobster species that has a high price in local and international markets and is economically valuable. The objective of this study was to determine the effect of stocking density on the survival and growth of spiny sand lobsters kept in cylindrical cages (1.00 m high × 1.15 m in diameter) at a depth of 7 m below the water surface, with an average ambient temperature of 29–32°C.MethodsThe 3‐month study was performed in 2022 and had a completely randomized design. There were three treatment groups, each of which had three replications. Stocking densities were 10 lobsters/m2 (10 lobsters/cage) for treatment A, 15 lobsters/m2 (15 lobsters/cage) for treatment B, and 20 lobsters/m2 (20 lobsters/cage) for treatment C. The initial average body weight was 75 g/lobster.ResultThe survival rates for treatment A (mean ± standard error = 91.50 ± 0.25%) and treatment B (93.30 ± 0.51%) were higher than the survival rate for treatment C (86.05 ± 0.45%), but the values were not significantly different. Daily weight gain and the specific daily growth rate for treatments A and C were significantly higher than those of treatment B. The feed conversion ratio was not significantly different among the groups. Total hemocyte count in the hemolymph between treatments A and B as well as initial (day‐0) values were not significantly different, but values for treatments A and B were significantly lower than that for treatment C. The hemolymph glucose value for treatment A was significantly lower than that of treatment C but was not different from that of treatment B.ConclusionThe grow‐out study of spiny sand lobsters at 7‐m depth indicated an optimal stocking density of 15 lobsters/m2. This was supported by several physiological response and production performance parameters, which generally had no significant difference with those of the lower stocking density.
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