THE STUDY OF RICE EEL FARMING (MONOPTERUS ALBUS) IN THE RECIRCULATION SYSTEM

S. Lai
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Abstract

The study of rice eel farming (Monopterus albus Zuiew, 1793) in the recirculation system is to find out a suitable model for rice eel growth and contribute to responding to climate change. The average length and weight  of the rice eels were 22.28 ± 0.21 cm/inds and 14.65 ± 0.48 g/inds, respectively. The experiment was conducted with two treatments: the control treatment and the recirculation treatment; each of them was repeated 3 times in 180 days. Rice eel was fed with 80% fresh trash fish and 20% pelleted pellets with 30% protein. The results showed that the environmental factors such as temperature, pH, N-NH3-, N-NO2- and alkalinity were in suitable range for rice eel growth during the experiment. The survival rate was not different between the two treatments. Weight growth rate in the recirculation system (97.70 ± 9.04 g/inds) was higher than the control (80.67 ± 0.16 g/inds) (p<0,05). Feed conversion ratio (FCR) in two treatments was not different with 2.49 ± 0.05% and 2.41 ± 0.22%. The amount of water was added in recirculation system (3.12 m3/tank) during 180 days only 1/10 compared with thecontrol (32.8 m3/tank). These results showed that the recirculation system was perfectly suited for the growth and development of rice eel.
黄鳝循环养殖系统的研究
在循环系统中对稻鳗养殖(Monopterus albus Zuiew, 1793)的研究是为了寻找适合稻鳗生长的模式,为应对气候变化做出贡献。鳗鲡平均体长为22.28±0.21 cm/穗,体重为14.65±0.48 g/穗。试验采用对照处理和再循环处理两种处理;180 d内,每组重复3次。黄鳝投喂80%新鲜垃圾鱼和20%含30%蛋白质的颗粒饲料。结果表明,温度、pH、N-NH3-、N-NO2-、碱度等环境因子均在适宜黄鳝生长的范围内。两种治疗方法的存活率无显著差异。再循环系统的体重增长率(97.70±9.04 g/inds)高于对照组(80.67±0.16 g/inds) (p< 0.05)。两处理的饲料系数(FCR)分别为2.49±0.05%和2.41±0.22%。180天内循环系统的加水量(3.12 m3/水箱)仅为对照组(32.8 m3/水箱)的1/10。上述结果表明,该循环系统非常适合黄鳝的生长发育。
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