Heterotrophic Bacterial Population in Water, Sediment and Fish Tissues Collected From Koka Reservoir and Awash River, Ethiopia  

Lakew Wondimu1 , Sreenivasa V1 , Prabhadevi L1 , Natarajan P1 , Khillare Y2
1. Department of Biology, Ambo University, Ethiopia.
2. Dr. Babasaheb Ambedkar Marathwada University, Maharashtra, India.
Author    Correspondence author
International Journal of Aquaculture, 2015, Vol. 5, No. 11   doi: 10.5376/ija.2015.05.0011
Received: 16 Apr., 2015    Accepted: 08 May, 2015    Published: 04 Jun., 2015
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Wondimu L., Sreenivasa V., Prabhadevi L., Natarajan P and Khillare Y., 2015, Heterotrophic Bacterial Population in Water, Sediment and Fish Tissues Collected From Koka Reservoir and Awash River, Ethiopia, International Journal of Aquaculture, Vol.5, No.11: 1-5 (doi: 10.5376/ija.2015.05.0011)


The quantitative estimation of total heterotrophic bacteria in the water, sediment and body tissues is helpful in predicting the quality of the fish as well as the status of the water body. The bacterial population in the water of Koka Reservoir and the Awash River, studied monthly for a period of one year, showed variation from 0.0.2×104 cfu/ml to 2.6×104 cfu/ml. Whereas, in the sediment the highest population density was 2.6 cfu/g and the lowest was 0.98×104 cfu /g. The highest population density in the reservoir was recorded in the sediment in January, while in the water was in August. The heterotrophic bacteria population in the river water and sediment was lower than the reservoir. During the non rainy season (February and March) the sediment bacteria increased with increase in water temperature and reduced rate of water level. The bacteria in the river water greatly reduced during February even though a regular pattern was not evident throughout the study period. The total bacterial population in different tissues of Cyprinus carpio and Oreochromis niloticus showed maximum population in intestine, followed by gill, skin, kidney and liver

Cyprinus carpio; Oreochromis niloticus; Heterotrophic Bacteria; Body Tissues
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