Volume 4, Issue 2, March 2019, Page: 35-41
Stocking Density, Length-Weight Relationship and the Condition of Nile Tilapia in Valley Dam Based Floating Cages in Semi-Arid Karamoja Sub-Region of Uganda
Constantine Chobet Ondhoro, Nabuin Zonal Agricultural Research and Development Institute, Moroto, Uganda; Buginyanya Zonal Agricultural Research and Development Institute, Mbale, Uganda
Moses Ndugwa, Nabuin Zonal Agricultural Research and Development Institute, Moroto, Uganda
Paul Boma, Nabuin Zonal Agricultural Research and Development Institute, Moroto, Uganda
Charles Byaruhanga, Nabuin Zonal Agricultural Research and Development Institute, Moroto, Uganda
George Egau, Nabuin Zonal Agricultural Research and Development Institute, Moroto, Uganda
Paul Okullo, Nabuin Zonal Agricultural Research and Development Institute, Moroto, Uganda
Received: Feb. 27, 2019;       Accepted: Apr. 3, 2019;       Published: May 17, 2019
DOI: 10.11648/j.ijnrem.20190402.11      View  46      Downloads  11
Abstract
Biological indices; length-weight relationship and fish condition are tools for design of husbandry practices and developing policies for fish farming in natural and artificial water systems. We investigated the effects of fish stocking density treatments; A (100), B (150), C (200) and D (250) fishm-3 on growth and well-being of Nile tilapia, reared in floating cages at Arechek valley dam located in Napak District, Karamoja-Uganda. Length-weight relationship and relative condition factor were computed for each treatment and the resultant outputs compared using univariate ANOVA, and regression analyses. Final fish weights (±Stdev) in different treatments were 311.49±114.6, 204.8±30.5, 138±40.2 and 153.3±68.8g while the mean total lengths were 23.29±2.55 cm, 17.5±5.5, 15.6±15.6 and 19.4±3.02 cm, in A, B, C and D respectively. The length-weight allometry was significantly (P<0.05) different among treatments, (F(5, 1081) = 3.102). Mean relative conditions (Kn) were (±Stdev) 1.08±0.08, 1.91±0.13, 0.79±0.08 and 0.65±0.08 in A, B, C and D respectively, and these were significantly different (P<0.05). Water quality parameters did not influence fish growth and Kn, F(4, 59) = 1.849, P>0.05, R2 = 0.111). The variation in condition was mainly due to stocking density (P<0.05). The most appropriate stocking density of Nile tilapia in valley dam using 35% C. P sinking feed is 100-150 fishm-3 of cage.
Keywords
Growth, Fish Well-being, Aquaculture Policy
To cite this article
Constantine Chobet Ondhoro, Moses Ndugwa, Paul Boma, Charles Byaruhanga, George Egau, Paul Okullo, Stocking Density, Length-Weight Relationship and the Condition of Nile Tilapia in Valley Dam Based Floating Cages in Semi-Arid Karamoja Sub-Region of Uganda, International Journal of Natural Resource Ecology and Management. Vol. 4, No. 2, 2019, pp. 35-41. doi: 10.11648/j.ijnrem.20190402.11
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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