International Science Community Association International Research Journal of Biological Sciences 2278-3202 7 3 2018 03 10 Bringing blue revolution to the desert 29 35 EN Alakesh Barman 1 P.G. Department of Zoology, Bajali College, Barpeta-781325, India Binode Kr. Baruah 2 Department of Zoology, Cotton University, Guwahati-781001, India Ahmed J. 1 Department of Zoology, Ahmadu Bello University Zaria, Nigeria Shehu D.M. 2 Department of Zoology, Ahmadu Bello University Zaria, Nigeria Ndams I.S. 3 Department of Zoology, Ahmadu Bello University Zaria, Nigeria Mahimasanthi A. 1 Central Sericultural Research and Training Institute (CSRTI), Central Silk Board (CSB), Srirampura, Mysore- 570 008, Karnataka, India Vedavyasa Vedavyasa 2 Research Extension Centre, CSRTI, CSB, Tumkur and Madiwala, Karnataka, India Morrison M.N. 3 Research Extension Centre, CSRTI, CSB, Tumkur and Madiwala, Karnataka, India Sivaprasasd V. 4 Central Sericultural Research and Training Institute (CSRTI), Central Silk Board (CSB), Srirampura, Mysore- 570 008, Karnataka, India Saraswat Punit 1 Dept. of Zoology and Env.Sci. Lachoo Memorial College of Sci and Tech (Autonomous), Jodhpur (Rajasthan), India > Research Paper 2017 7 19 2018 03 10 One species of Indian major carps (Labeo rohita) and one species of exotic carp (Cyprinus carpio) were breed by induced breeding method between 19.3.1998 and 8.4.1999 using CIFE D-81 unit which has two type of setting – Indoor and Outdoor. The indoor setting has breeding and hatching unit, while outdoor setting has an underground, overhead tank and a filtration – sedimentation unit. Chlorine, sand and zooplankton free water was used for breeding exercise and natural condition was simulated (showering, water circulation) in the breeding tank after introduction of brooders using the synthetic hormone “OVAPRIM” @ of 0.5 ml/kg wt. The time of giving injection was varied in different exercises but the results were found to be the same. The eggs in case of Labeo rohita were collected in hapa and introduced in the egg containers (2 mm mesh size cotton netting) hanging in hatchery buckets. In case of C. carpio polythene strips having attached eggs were introduced in nursery tank. High dissolved oxygen in nursery tank and hatchery bucket was maintained. The oxygen content in nursery tank was further increased using multiple circular water jet provided at the top circumference of tank. Vertical air lift system in the tank was used for removing metabolites from time to time. The small quantity of water about 5000 to 6000 liters used in whole operation was passed through the filtration and sedimentation unit. The water quality improved considerably after passing through this unit as dissolved oxygen increased from 1.5 ml/l to 4.2 ml/l, free CO2 decreased from 9.0 ppm to Nil, bicarbonates decreased from 102.0 ppm to 96.0 ppm, nitrate reduced from 16.853 to 7.673 µg/l while phosphate decreased from 0.2567 µgmPO4-P/lt to 0.1244 µgmPO4-P/lt. This water was found to be suitable for breeding operation and was reused conserving this important commodity of desert. Copyright@ International Science Community Association