The Water Quality Of Floriculture Effluent and Its Effect on Oreochromis Niloticus and Cyprinus Carpio In Aquaria: The Case of Lake Ziway, Ethiopia
| dc.contributor.advisor | Getahun, Abebe (Professor) | |
| dc.contributor.advisor | Mengistou, Seyoum (Professer) | |
| dc.contributor.author | Teshome, Elsa | |
| dc.date.accessioned | 2019-04-22T10:26:46Z | |
| dc.date.accessioned | 2023-11-09T11:25:41Z | |
| dc.date.available | 2019-04-22T10:26:46Z | |
| dc.date.available | 2023-11-09T11:25:41Z | |
| dc.date.issued | 2018-03-01 | |
| dc.description.abstract | Floriculture industry is a booming sector in Ethiopia and is spreading throughout the country. It is believed to create pressure on biodiversity through the release of hazardous chemicals in the form of fertilizers, pesticides and disposal of untreated wastes which contaminates the water body and could be harmful to fishes and other aquatic organisms. Previous studies in Lake Ziway imply that floriculture industries are major sources of chemical substances resulting in deterioration of water quality that affect fish species in the lake. The present experimental study aimed at assessing the water quality of the floriculture effluent discharge that reaches Lake Ziway and its impact on the survival, behavior and histology of Oreochromis niloticus and Cyprinus carpio in aquaria with 0%, 25%, 50%, 75% and 100% concentrations of the effluent. Histological changes in gills, kidney and liver were examined by using light microscope to evaluate the health of C. carpio and O. niloticus subjected to the effluent, which lasted for 15 days. The results of all physicochemical analysis indicated that all parameters in the effluent and lake water were within the range of maximum permissible limits (MPL) set by Environmental Protection Authority (Ethiopia-EPA, 2003) and FAO, WHO guideline for the maintenance for fisheries and aquatic life. But, measured values of some parameters such as pH, conductivity, total phosphorus and soluble reactive phosphorus indicate the pollution status of Lake Ziway. There were no behavioral alterations and deaths observed in the exposed and control treatments of both fish species during the experimental period. In the result of the histology sections, the degree of lesions were comparatively increased with the increase in effluent concentration, while the alteration in the liver and kidney of O. niloticus was higher than C. carpio, this indicates that the floriculture effluent may be one of the problems for the decrease in catch size of O. niloticus than C. carpio. The gills, livers and kidneys of control groups exhibited a normal structure. Therefore, the effluent discharge from Sher Ethiopia flower industry has affected the water quality and ecology of the lake; Lake Ziway becoming less suitable for fishes. Actions should be taken before the once precious fresh water lake turns out to be seriously polluted and fishes and aquatic organisms are exposed to severe pollution. | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/18114 | |
| dc.language.iso | en | en_US |
| dc.subject | Oreochromis Niloticus | en_US |
| dc.subject | Cyprinus Carpio | en_US |
| dc.subject | Water Quality | en_US |
| dc.subject | Floriculture Effluent | en_US |
| dc.title | The Water Quality Of Floriculture Effluent and Its Effect on Oreochromis Niloticus and Cyprinus Carpio In Aquaria: The Case of Lake Ziway, Ethiopia | en_US |
| dc.type | Thesis | en_US |