Evaluation of a suitable ingredient composition for supplementary feeds of nile tilapia (Oreochromis niloticus) grown in fertilized earthen ponds | |
| Author | Dadu, Anthony Henry |
| Call Number | AIT Thesis no.AQ-10-10 |
| Subject(s) | Nile tilapia--Feeding and feeds Fishes--Feeding and feeds |
| Note | A thesis submitted in partial fulfillment of the re quirements for the degree of Master of Science in Aquaculture and Aquatic Resources Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-10-10 |
| Abstract | An experiment was carried out in three fertilized earthen fish ponds 200 m 2 each to determine the optimum ingredient composition of supplementary feed of juvenile sex reversed male Nile tilapia ( Oreochromis niloticus ) of average mean weight 21.0 g ± 2.9 (S.D). Each p ond consisted of ten cages having dimensions of 1 x 1 x 1m (1m³) at a stocking density of 20fish/cage for 64 days. The experimental fish were fed with diets (sinking feed) of protein level 30% at the rate of 3% body weight, twice dail y. The ponds were fertilized weekly with chemical fert ilizers, urea (560 g/200m 2 /weeks) and Triple super phosphate (140 g/200m 2 /week) at rates of 28kg N and 7kg P ha -1 respectively. The feeding rates were adjusted biweekly based on s ample weight and mortality of caged tilapia. The cages were covered with nylon nets to prevent bird’s predation. Water was added to the ponds weekly to replace water loss due to se epage and evaporation. The fish were fed experimental diets supplemented w ith a fish meal, mineral premix, vitamin premix and lipid (control-1), diet 2- vitamin, diet 3- minerals, diet 4-lipid respectively. Diet 5 with complete plant protein sources supplemented wi th Vitamin premix, mineral premix, and lipid (control-2), diet 6- vitamin, diet 7-minerals , diet 8-lipid, diet 9 addition of fishmeal- vitamin, minerals &lipid and diet 10 non-addition o f fish meal, vitamin, mineral and lipid respectively. The Result of water quality showed low concentratio n of chlorophyll ‘a’ throughout the experimental study which indicated that new ponds w ere not well fertilized despite of weekly fertilization caused by clay turbidity effect. Howe ver, among the diets studied fish meal, vitamin premix and mineral premix supplementation w ere found to be relative superior to other diets significantly affect the weight gain, f ish yield, food conversion ratio, protein efficient ratio and feed intake. This study indicat ed that fishmeal cannot be replaced by soy bean meal in low natural food productivity for Nile tilapia growth since natural food could not provide enough nutrients to fish. |
| Year | 2010 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-10-10 |
| 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 | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Yakupitiyage Amararatne |
| Examination Committee(s) | Gallardo, Wenresti Gl;Thakur, Dhirendra P. |
| Scholarship Donor(s) | Ministry of Livestock Development and Fisheries, Tanzania |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2010 |