ความหนาแน่นที่เหมาะสมในการอนุบาลลูกกุ้งก้ามกรามระบบน้ำหมุนเวียนในบ่อดิน
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Abstract
Optimum density for nursing giant freshwater prawn postlavae (Macrobrachium rosenbergii) in recirculating aquaculture system in earthen ponds
The optimum density for nursing post larvae giant freshwater prawn (Macrobrachium rosenbergii) in recirculating aquaculture system was experimented in earthen ponds. The post larvae were nursed at different densities of 120, 240 and 360 prawns.m-2 for 30 days. It was found that the stocking densities have no effect on growth and survival rate of prawn. The suitable density for nursing pond was 360 prawns.m-2. The water qualities of all treatments had an optimal range for prawn culture, Total ammonia nitrate valued 0.044 ± 0.052, 0.045 ± 0.053 and 0.048 ± 0.053 mg/l, a nitrite range averaged 0.033 ± 0.023, 0.030 ± 0.020 and 0.038 ± 0.019 mg/l , and nitrate concentration averaged 0.019 ± 0.010, 0.020 ± 0.008 and 0.023 ± 0.009 mg/l, respectively. The aquatic plant can eliminate nitrogen compounds such as total ammonia or nitrate. Water Lilly grows better than hydrilla and Pandanus tectorius, respectively.
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