The present study was undertaken to generate first time information on the optimal stocking density for fry to fingerling rearing of Hypselobarbus pulchellus. Rearing was carried out for 90 days at stocking densities of 15, 30, 45, 60, 75, 90, 105 and 120 fish/m² in 24 m² cement tanks. While the length of fish at harvest ranged from 3.42 cm in 120/m² to 6.11 cm in 15/m² densities, the weight ranged from 0.41 g in 120/m² to 2.62 g in 15/m². The final length and weight were inversely related to the stocking density. However, no significant variation (p > 0.05) in length was observed among the stocking densities of 15, 30, 45 and 60/m². Similarly, the final weight of the fingerlings also did not differ (p > 0.05) between the stocking densities 15, 30 and 45/m². Further, increase in stocking densities resulted in significant reduction in final length and weight, with the highest stocking density of 120/m² recording the lowest values. The condition factor varied between 0.95 and 1.17 with no difference (p > 0.05) among the stocking densities. The survival of fingerlings at harvest ranged between 81 and 90%, but was not statistically different. The growth in terms of length and weight of H. pulchellus was superior under stocking densities 15, 30 and 45 fish/m² compared to higher densities. Hence, the stocking density of 45 fish /m² is recommended as the optimum for fry to fingerling rearing of H. pulchellus.

中文翻译：

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在放养鱼种中，放养密度对极度濒危的半岛鲤鱼Hypselobarbus pulchellus（Day，1870）的生长和存活的影响

本研究进行了首次信息的最佳放养密度的鱼繁殖鱼的小鱼的繁殖。在24 m ²水泥罐中以15、30、45、60、75、90、105和120鱼/ m ^2的放养密度进行了90天的饲养。收获时鱼的长度在密度为120 / m ^2的3.42厘米至15 / m ^2的密度为6.11厘米，重量在120 / m ^2的0.41克至15 / m ^2的2.62克之间。最终的长度和重量与放养密度成反比。然而， 在15、30、45和60 / m的放养密度之间，长度没有显着变化（p > 0.05）²。同样， 放养密度15、30和45 / m ²之间鱼种的最终重量也没有差异（p > 0.05）。此外，放养密度的增加导致最终长度和重量的显着降低，最高放养密度为120 / m ²记录了最低值。条件因子在0.95和1.17之间变化 ，放养密度之间无差异（p > 0.05）。鱼种在收获时的存活率在81％至90％之间，但在统计学上没有差异。在种群密度为15、30和45条鱼/ m ^2的情况下，长尾。的长度和重量的增长要好。与更高的密度相比。因此，建议以45鱼/ m ²的放养密度作为H鱼苗到鱼种饲养的最佳选择。Pulchellus。