Integration of semi-intensive and intensive tilapia culture in concrete tanks | |
| Author | Jiang, Lan |
| Call Number | AIT Thesis no. AE-93-24 |
| Subject(s) | Tilapia Fish-culture |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Science. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AE-93-24 |
| Abstract | An experiment was conducted to investigate the effects of stocking density of caged fish on water quality and fish growth in an integrated system; in order to determine the optimum stocking ratio of intensively cultured fish in cages and semi-intensively cultured fish in tanks (surrounding). This integrated system was carried out with 6 stocking densities (3, 5, 10, 15, 20 and 25 fish/cage) in 18 net cages with triplicates. Each of those cages was installed in each of 18 concrete tanks (2.5x2.0x1.2m). Fish were stocked at 15 fish/tank in the surrounding water. Two sizes of Nile tilapia (Oreochromis niloticus), 231.0±8.2 g and 18.7±0.5 g, were stocked in cages and tanks, respectively. Fish in cages were fed twice daily while those in surrounding water depended totally upon the natural food stimulated by nutrient effluence from the cages. After 84 rearing days, fish in cages stocked at the density of 3-15 fish/cage had significantly higher survival rates than those stocked at either 20 or 25 fish/cage (P<0.001). Fish mean daily weight gains in cages ha~ negative exponential relationship with the cagf fish stocking densities (r = 0.92, P<0.001 2 ). Feed conversion efficiencies (r =0.82, P<0.001) and final harvest sizes (r =0.90, P<0.001) of fish in cages were inversely linear related to cage stocking densities (P<0.001). In the surrounding water, fish survival rates and final harvest sizes were significantly affected by cage stocking density (P |
| Year | 1993 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-93-24 |
| 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 Food Engineering (AE) |
| Chairperson(s) | Lin, C. Kwei |
| Examination Committee(s) | Edwards, Peter;Amararatne Yakupitiyage |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1993 |