Effects of Niger Cake Inclusion in Fish Feed as a Major Protein Source on Anion Dynamics in Nile Tilapia-Lettuce Aquaponics System
| dc.contributor.advisor | Getahun, Abebe (Professor) | |
| dc.contributor.advisor | Tadesse, Abebe (PhD) | |
| dc.contributor.author | Amare, Liyuwork | |
| dc.date.accessioned | 2019-07-30T07:53:45Z | |
| dc.date.accessioned | 2023-11-09T04:20:36Z | |
| dc.date.available | 2019-07-30T07:53:45Z | |
| dc.date.available | 2023-11-09T04:20:36Z | |
| dc.date.issued | 2018-05-04 | |
| dc.description.abstract | The aquaponics systems culture different organisms that are dependent on nutrients generated from feed. Most of the time the major protein source of this system is fish meal. However, the availability of fish meal is very scarce and the cost is not affordable for developing countries. So, this study was carried out to examine Niger seed cake as replacement of fish meal and also to compare the anion dynamics of Niger seed cake with fish meal. The experiment was conducted in five treatments, each treatment in duplicate, with the proportion of Niger seed cake; 0% (Control), 12.5% (TA), 25% (TB), 37.5% (TC), 42.5% (TD). Also a hydroponic treatment (H) was included to examine performance of each treatment on anion dynamics. Samples of fish, lettuce and water were collected every week for about five weeks. Both phosphorus and nitrogen groups (ammonia, nitrite and nitrate) were analyzed by spectrophotometer. The result of the experiment had shown that as the Niger seed cake inclusion increased in the fish feed (43%), TD, the increment of anion in the system was observed, which was comparable with the control diet. However, it had low anion loading than the hydroponic solution. In the lettuce, as percentage of the alternative feed increased, the concentration of anion became higher and comparable with the control fish feed. In general, the result of the experiment had shown little difference with the fish meal. Therefore, higher percentage of alternative feed from plant sources such as Niger seed cake could be taken as supplementary source of feed. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/18692 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Anion Dynamics | en_US |
| dc.subject | Aquaculture | en_US |
| dc.subject | Aquaponics | en_US |
| dc.subject | Fish Meal | en_US |
| dc.subject | Hydroponics | en_US |
| dc.subject | Lettuce | en_US |
| dc.subject | Niger Seed Cake | en_US |
| dc.subject | Nile Tilapia | en_US |
| dc.title | Effects of Niger Cake Inclusion in Fish Feed as a Major Protein Source on Anion Dynamics in Nile Tilapia-Lettuce Aquaponics System | en_US |
| dc.type | Thesis | en_US |