Co-culture of walking catfish with Indian major carps | |
| Author | Rai, Sunila |
| Call Number | AIT Thesis no. AS-97-03 |
| Subject(s) | Fish-culture Catfishes Carp |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AS-97-03 |
| Abstract | An experiment was conducted for 112 days to evaluate the growth performance of hybrid catfish and carps (silver carp, rohu and mrigal) in three different stocking ratios of 3.2:1, 4.8:1 and 6.4:1, and their impact on water quality and nutrient budget. Hybrid catfish were stocked in 1.2 m3 cage, at a density of 100, 150 and 200 fish/cage. Fish were fed on pellet feed, at a rate of 2% body weight. Carps were stocked at a rate of 5,000 fish/ha in 250 m2 ponds. The ratio of carps was 1: 1 : 1. The carps were grown solely on natural food produced by nutrients wastes from caged catfish. Ponds were fertilized prior to stocking at a rate of 4 kg N/ha/day and 1 kg P/ha/day. Net fish yield of hybrid catfish (28.7 kg/cage), net yield of carps (13.3 kg/pond) and combined net yield of caged catfish and pond carps (127.9 kg/pond) were significantly higher (P<0.05) in higher stocking density of catfish. Stocking ratio of 6.4: 1 appeared to be the best stocking ratio. Stocking ratio did not affect water quality. Hybrid catfish culture released 61-64% N and 76-79% P, out of which carps recovered 3.1-3.8% N and 2.4-2.9% P, and 1.5-2.3% N and 1.3- 14.0% P were lost to the water column. Rest nutrients were unaccounted for. Nutrients derived from the wastes equal to fertilization rate of 0.9-1.6 kg N/ha/day and 0.3-0.5 kg P/ha/day, which were grossly inadequate for phytoplankton production to support the growth of herbivorous carps. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AS-97-03 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Aquatic Systems (AS) |
| Chairperson(s) | Lin, C. K.; |
| Examination Committee(s) | Edwards, Peter ;Little, David C. ; |
| Scholarship Donor(s) | NORAD; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1997 |