An experiment was carried out to evaluate the growth performance and yield of Labeo bata reared in cages at different stocking densities in a floodplain wetland of Assam, India. Fifteen cages (effective water volume 40 m³ each) installed in the wetland were stocked with fingerlings of L. bata (mean length 8.20 ± 0.08 cm; mean weight 4.82 ± 0.13 g) at five different stocking densities, i.e., 25 (D25), 50 (D50), 75 (D75), 100 (D100) and 150 fingerlings m⁻³ (D150) in triplicates. Fish were fed with pelleted feed containing 30 % CP at 3–5 % body weight twice-a-day for six months. Specific growth rate of the reared fish recorded at different stocking densities were 1.08 ± 0.03, 0.89 ± 0.01, 0.90 ± 0.05, 0.77 ± 0.02 and 0.57 ± 0.02 % day^-1, respectively, in D25, D50, D75, D100 and D150. The corresponding weight gain percent were 604.77 ± 35.63, 395.37 ± 11.32, 407.88 ± 44.91, 296.61 ± 13.07 and 180.70 ± 11.02. In general, growth performance of the reared fish was inversely proportional to stocking density. However, yield (biomass) increased with increase in stocking density of up to 75 fingerlings m^-3 after which no significant increase was observed. Economics of the cage aquaculture system also showed highest net revenue and benefit-cost ratio at 75 fingerlings m^-3. Rearing of fish at this stocking density yielded 50 % higher fish production and generated 92.5 % higher net revenue than rearing at the lowest stocking density. The results suggest 75 fingerlings m^-3 as the optimum stocking density for rearing L. bata in net cages.

在印度阿萨姆邦（Assam）的洪泛区湿地中，进行了一项实验，以评估不同放养密度下在网箱中饲养的Labeo bata的生长性能和产量。在湿地中安装的十五个网箱（有效水量各为40 m ³）以五种不同的放养密度放养巴塔氏杆菌（平均长度8.20±0.08 cm；平均重量4.82±0.13 g）的鱼种，即25（D25）一式三份，分别为50（D50），75（D75），100（D100）和150个鱼种m ^-3（D150）。每天两次给鱼类喂食含30％CP的颗粒饲料，体重为3-5％，每天两次。每天在不同放养密度下养鱼的比生长率分别为1.08±0.03、0.89±0.01、0.90±0.05、0.77±0.02和0.57±0.02％在D25，D50，D75，D100和D150中分别为^-1。相应的增重百分比为604.77±35.63、395.37±11.32、407.88±44.91、296.61±13.07和180.70±11.02。通常，养殖鱼的生长性能与放养密度成反比。但是，产量（生物量）随放养密度增加而增加，最多可达75种鱼种m ^-3，此后未观察到明显的增加。网箱养殖系统的经济学也显示最高的净收入和效益成本比为75种鱼苗m ^-3。与在最低放养密度下进行养鱼相比，以这种放养密度进行养鱼可提高鱼类产量50％，并产生92.5％的净收入。结果表明75个鱼种m ^-3作为在网箱中饲养巴氏乳杆菌的最佳放养密度。