Effects of carbohydrate supplementation on water quality, microbial dynamics and growth performance of giant tiger prawn (Penaeus monodon)
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Biofloc technology based 45-day indoor growth trial was conducted to evaluate the effect of carbohydrate (CHO), molasses supplementation on two developmental stages viz, juvenile (J) and sub-adult (SA) of Penaeus monodon in zero-water exchange system. P. monodon juveniles (1.56 ± 0.04 g) and sub-adults (14.32 ± 0.22 g) were stocked in fibre-reinforced plastic tanks (1,000 L) with soil base. Carbohydrate supplementation significantly reduced (p < 0.05) the total ammonia nitrogen (TAN), nitrite-N (NO2-N) and nitrate-N (NO3-N) over the time periods in sub-adult group. However, no significant difference in TAN and NO2-N was observed in juvenile-based treatments. Supplementation of carbohydrate significantly increased (p < 0.05) the water and soil total heterotrophic bacterial (THB) count in both juvenile and sub-adults. Despite increase in total Vibrio count (TVC), lower TVC/THB % was noticed in the water column of J + CHO (0.82) and SA + CHO (0.73) compared to control groups, J − CHO (1.48) and SA − CHO (1.21). Supplementation of carbohydrate increased the final body weight in J + CHO (6.51 ± 0.44 g) and SA + CHO (22.52 ± 0.98 g) compared with respective controls, J − CHO (5.05 ± 0.45 g) and SA − CHO (20.00 ± 0.33 g). Similarly, significantly lower (p < 0.05) feed conversion ratio and better protein efficiency ratio were recorded in carbohydrate-supplemented juvenile and sub-adults treatment groups. The present study demonstrates that supplementation of carbohydrate reduced the nitrogenous metabolites and significantly enhanced the growth performance of juvenile and sub-adult of P. monodon.
KeywordsBiofloc technology Carbohydrate supplementation C:N ratio Ginat tiger prawn Microbial dynamics Penaeusmonodon
The authors are grateful to the Director, Central Institute of Brackishwater Aquaculture, Chennai, for providing the required facilities to conduct this study. The constant encouragement received from Dr. K.P. Jithendran, Principal Scientist and Scientist − in − Charge, AAHED, Central Institute of Brackishwater Aquaculture, Chennai, is gratefully acknowledged. Support and help received from the laboratory staff, especially Mr. Mrinmay Das of Kakdwip Research Centre of CIBA, are also duly acknowledged.
- Anand PSS, Kumar S, Panigrahi A, Ghoshal TK, Dayal JS, Biswas G, Sundaray JK, De D, Raja RA, Deo AD, Pillai SM, Ravichandran P (2013a) Effects of C:N ratio and substrate integration on periphyton biomass, microbial dynamics and growth of Penaeus monodon juveniles. Aquacult Int 21:511–524CrossRefGoogle Scholar
- AOAC (1995) Official methods of analysis. In: Helrich K (ed) 15th edn. Association of Official Analytical Chemists, Virginia, p 1094Google Scholar
- APHA (1998) Standard methods for the examination of water and wastewater. In: Clesceri LS, Greenberg AE, Eaton AD (eds) American Public Health Association, American Water Works Association and Water Environment Federation. United Book Press, Washington DCGoogle Scholar
- Avnimelech Y (2012) Biofloc technology–A practical guide book, 2nd edn. The World Aquaculture Society, Baton Rouge 272Google Scholar
- NRC (1993) Nutrient requirements of fish. National Academy Press, USA, p 114Google Scholar
- Xu WJ, Pan LQ (2012) Effects of bioflocs on growth performance, digestive enzyme activity and body composition of juvenile Litopenaeus vannamei in zero–water exchange tanks manipulating C/N ratio in feed. Aquaculture 357:147–152Google Scholar