The effect of stocking density on the growth performance, cannibalism and survival of Asian seabass Lates calcarifer fry in the static water system (SWS), and recirculating aquaculture system (RAS) was investigated. Three stocking densities 0.03, 0.04 and 0.05 ind/L were used, where the initial length and weight of the fry were 2.5 ± 0.0 cm and 0.27 ± 0.0 g respectively. At the end of the trial, no significant effect of stocking density was observed on the growth performance of Asian seabass fry (p > 0.05). After 45 days, the total body length and wet body weight were 11.63±0.18cm and 20.06 ± 0.98 g respectively obtained from the RAS were significantly higher than the SWS (p < 0.001). The maximum weight gain (WG) and specific growth rate (SGR) were 19.79 ± 0.98 g and 9.56 ± 0.10% day⁻¹ respectively were found in the RAS significantly higher than the results obtained in the SWS (p < 0.001). A considerably lower FCR (0.67±0.03) in RAS indicated better feed utilization by fish than SWS (p < 0.01). In the present study, cannibalism was highly influenced by the stocking density and culture system and positively correlated with the stocking density. Lower cannibalism was observed at 0.03 ind/L stocking density (27.78 ± 5.56%), and the cannibalism was (35.97 ± 6.28%) in the RAS. There was no natural mortality occurred during the experimental period. The present study suggests that Asian seabass fry reared in the RAS with a lower stocking density can significantly reduce cannibalism and increase the survival rate with better growth performance.

中文翻译：

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放养密度对不同育苗系统中亚洲鲈鱼Lates calcarifer (Bloch, 1790) 鱼苗生长性能、自相残杀和存活率的影响

在业绩增长，自相残杀和亚洲鲈鱼的生存放养密度的影响鲈calcarifer在静态水系统（SWS）炒，和循环水养殖系统（RAS）的影响。使用三种放养密度 0.03、0.04 和 0.05 ind/L，其中鱼苗的初始长度和重量分别为 2.5 ± 0.0 cm 和 0.27 ± 0.0 g。在试验结束时，没有观察到放养密度对亚洲鲈鱼苗的生长性能有显着影响（p  > 0.05）。45天后，从RAS获得的体长和湿体重分别为11.63±0.18cm和20.06±0.98g，显着高于SWS（p < 0.001)。RAS 中发现的最大增重 (WG) 和比生长率 (SGR) 分别为 19.79 ± 0.98 g 和 9.56 ± 0.10% ^-1天，显着高于 SWS 中获得的结果 ( p  < 0.001)。RAS 中相当低的 FCR (0.67±0.03) 表明鱼比 SWS 更好的饲料利用率（p < 0.01)。在本研究中，自相残杀受放养密度和养殖系统的影响很大，并与放养密度呈正相关。在 0.03 ind/L 放养密度 (27.78 ± 5.56%) 下观察到较低的同类相食，RAS 中的同类相食为 (35.97 ± 6.28%)。试验期间未发生自然死亡。目前的研究表明，在 RAS 中以较低的放养密度饲养的亚洲鲈鱼鱼苗可以显着减少同类相食并提高成活率，并具有更好的生长性能。