Effect of mixed feeding schedules with a single diet on the reproductive performance of Nile Tilapia (Oreochromis niloticus) | |
| Author | Sabbir, Wasim |
| Call Number | AIT Thesis no.AQ-14-01 |
| Subject(s) | Nile Tilapia Fishes--Feeding and feeds Nile tilapia--Feeding and feeds |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science in Aquaculture and Aquatic Resource Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-14-01 |
| Abstract | The effects of four feeding schedules consisting (1) control 1% BW; (2) one day high feeding rate (1.5% BW) and next day low feeding rate (0.5% BW; abbreviated as 1H: 1L); (3) 1H:2L; and (4) 1H:3L wit h a commercial feed containing 30% protein on the reproductive performance of female Nile til apia were studied for 90 days in hapa s (3 x 2 m) installed in an earthen pond ( 100 x 20 m) . There were a total of 216 tagged females which were equally distributed among 12 hapas. A ratio of 2 female to 1 male was maintained. Eggs were collected weekly from the buccal cavity of incubating females. Majority of broodfish spawned at 14 -da y, 21- day or 28 -day intervals. Around 7 4% female spawned 14- days intervals within first six weeks and 38% of them continually spawn ed in 14- days intervals till the end of the experiment. However, only three percent female s spawned six times during the experimental period (90 days) which was the highest extent in terms of spawning frequency . Around 17% female did not spawn during the experimental period . There were n o signi ficant difference s of eggs spawn -1 , eggs kg female -1 day -1 , eggs female -1 , spawn female -1 , eggs m -2 day -1 , inter spawning intervals (ISI) of female Nile tilapia fed under different feeding sch edules. Restricted feeding schedule ( 1H/3L) increased the egg weight and protein and lipid content by approximately 5% compared to the control treatment . Females showed significantly higher growth rate reared under the control and 1H: 1L feeding regimes . Lowest seed production cost was achieved from the broodstock rea red under 1H :3L feeding schedule. Th e results sugge sted that Nile tilapia female under restricted feeding regimes channel energy for reproduction rather than for somatic growth. |
| Year | 2014 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-14-04 |
| 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) | Anal, Anil Kumar;Bhujel, Ram C.; |
| Scholarship Donor(s) | Asian Development Bank -Japan; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2014 |