A 60 days experiment was conducted in raceway tanks to determine the impact of salinity on growth, survival, carcass composition and hematology of Etroplus suratensis fingerlings. The experimental unit consisted of three treatments viz., T1 (0 ppt), T2 (15 ppt), and T3 (25 ppt). Complete randomized design (CRD) was followed with each treatment in triplicate. A total of 1500 fingerlings were stocked in each tank with an average body weight of 22.43±0.88 g. The results of the present experiment showed that fishes reared in 15 ppt salinities has showed an improved growth performance in terms of specific growth rate (0.35±0.01 % day^-1), feed conversion ratio (0.11±0.01), feed efficiency ratio (8.72±0.52) and protein efficiency ratio (0.20±0.01), compared to 0 ppt and 25 ppt. Similarly, fishes reared in lower salinity (0 to 15 ppt) showed a better proximate composition compared to higher salinity of 25 ppt. In addition, fishes reared in 15 ppt salinity showed higher levels of hemoglobin (7.63±0.08 gm dl^-1), red blood cell (1.6±0.12 million cum m^-1), white blood cell (253000±57735 cells cum m^-1) and packed cell volume (21.63±0.08 %). Likewise, low levels of platelet, mean corpuscular volume (135.80±0.32 Fl), mean corpuscular hemoglobin (48.53±0.17 pg) and mean corpuscular hemoglobin concentration (35.46±0.20 gm %)) were observed in 15 ppt reared fishes. From the current study it is concluded that E. suratensis can be acclimatized to different water salinity and thereby it can be suggested as a potential candidate for farming at 15 ppt salinity.

中文翻译：

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研究基于滚道的养殖系统中盐分变化对珍珠斑鱼（Etroplus suratensis）（Bloch，1790年）的生长，饲料效率和血液学变化的影响

在跑道槽中进行了60天的实验，以确定盐度对Etroplus suratensis鱼种生长，存活，car体组成和血液学的影响。实验单元由三种处理组成。，T1（0 ppt），T2（15 ppt）和T3（25 ppt）。每次治疗均一式三份进行完全随机设计（CRD）。每个池中共放养1500种鱼种，平均体重为22.43±0.88 g。本实验的结果表明，以15 ppt盐度饲养的鱼在特定生长率方面（第^-1天为0.35±0.01％）显示出改善的生长性能。），饲料转化率（0.11±0.01），饲料效率比（8.72±0.52）和蛋白质效率比（0.20±0.01），分别为0 ppt和25 ppt。同样，与较低盐度（25 ppt）相比，以较低盐度（0至15 ppt）饲养的鱼的近端成分更好。此外，以15 ppt盐度饲养的鱼显示出较高的血红蛋白（7.63±0.08 gm dl ^-1），红血球（1.6 ±102万cum m ^-1），白血球（253000±57735细胞cum m ^-1））和填充细胞体积（21.63±0.08％）。同样，在15 ppt饲养的鱼中观察到了低水平的血小板，平均红细胞体积（135.80±0.32 Fl），平均红细胞血红蛋白（48.53±0.17 pg）和平均红细胞血红蛋白浓度（35.46±0.20 gm％）。根据目前的研究，可以得出结论：苏拉特大肠杆菌可以适应不同的水盐度，因此可以建议在15 ppt的盐度条件下进行耕作。