The use of papaya (Carica papaya) seed as an alternative method to control reproduction of nile tilapia (Oreochromis niloticus) | |
| Author | Mallya, Yovita John |
| Call Number | AIT Thesis no.AQ-10-12 |
| Subject(s) | Nile tilapia Papaya Seeds |
| 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-10-12 |
| Abstract | An experiment was conducted in outdoor concrete tanks of Aquaculture and Aquatic Resources Management (AARM) field of study of the Asian Institute of Technology to investigate the effect of papaya seed on both reproductive and growth performance of Nile tilapia (Oreochromis niloticus). In this study, three groups of fish (0.02-0.04g, 10-12g and 18-20g) were fed with low (30.5g/kg feed), medium (61g/kg feed), and high (122g/kg feed) doses of papaya seed for thirty days. Each size group had a control (no papaya seed in the feed). In addition to the three doses, raw papaya seed were fed to 10-12g fish group. After 30 days the fish were reared with feeds without papaya seed for 96 days (0.02-0.04g fish group) and 54 days (10-12g and 18-20g fish groups). The results showed that gonad abnormality increased significantly (P<0.05) with increase in papaya seed dose in all groups of fish. The number of fry produced decreased significantly (P<0.05) with increase in papaya seed dose. However, papaya seed did not affect the GSI of the fish in all size groups. There was no significant difference between the fish fed control diet and those fed different doses of papaya seed in terms of growth parameters (final mean weight, specific growth rate and daily weight gain). However, fish fed raw papaya seed had lower body weight during the first four weeks, this may be due to the fact that they were given only papaya seeds without other feed ingredients in that period of time. The growth improved after feeding them with feed without papaya seed. It was concluded that papaya seed has destructive effect on fish gonads which results in the reduction of number of fry produced by the fish fed papaya seed; therefore it can be used as an alternative method in controlling prolific breeding in Nile tilapia (O. niloticus). Small size fish (0.02-0.04g) and medium dose (61g/kg feed) are recommended to be used in controlling reproduction of Nile tilapia. |
| Year | 2010 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-10-12 |
| 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) | Gallardo, Wenresti |
| Examination Committee(s) | Yakupitiyage, Amararatne;Bhujel, Ram C. |
| Scholarship Donor(s) | Ministry of Livestock Development and Fisheries, Tanzania |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2010 |