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
Volume 4, Issue 2, March 2019, Pages: 35-41
Received: Feb. 27, 2019;
Accepted: Apr. 3, 2019;
Published: May 17, 2019
Views 46 Downloads 11
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
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.
Constantine Chobet Ondhoro,
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.
Ighwela, K. A., Ahmed, A. B., & Abol-Munafi, A. B. (2011). Condition factor as an indicator of growth and feeding intensity of Nile tilapia fingerlings (Oreochromis niloticus) fed on different diets of maltose. Journal of Agricultural and environmental science, 11(4):559-563. https://www.idosi.org/aejaes/jaes11(4)11/17.pdf.
Food and Agricultural Organization-FAO. (2016). The State of World Fisheries and Aquaculture 2016, Rome, Italy 200pp. retrieved from http://www.fao.org.html.
Sadek, S. (2013). Site selection and carrying capacity estimates for inland and coastal aquaculture in the Arab Republic of Egypt. In L. G. Ross, T. C. Telfer, L. Falconer, D. Soto & J. Aguilar Manjarrez, eds. Site selection and carrying capacities for inland and coastal aquaculture. Stirling, the United Kingdom of Great Britain and Northern Ireland pp. 183–196. http://www.fao.org/3/a-i3322e.pdf.
Uganda Bureau of Statistics-UBOS. (2016). Uganda Demographic and Health Survey 2016. Key indicators report, March 2017, Kampala. Retrieved from: https://www.ubos.org/onlinefiles/uploads/ubos/pdf%20documents/Uganda_DHS_2016_KIR.pdf.
Efitre, J., Chapman, L. J., & Murie, J. D. (2009). Fish condition in introduced tilapias of Ugandan crater lakes in relation to deforestation and fishing pressure. Environmental Biology of Fishes, 85(1), 63-75. http://doi:10.1007/s10641-009-9461-z.
Ogutu-Ohwayo, R., Odongkara, K., Okello, W., Mbabazi, D., Wandera, S. B., Ndawula, L. M., & Natugonza, V. (2013). Variations and changes in habitat, productivity, composition of aquatic biota and fisheries of the Kyoga lake system: lessons for management. African Journal of Aquatic Science, 38(1), 1-14. http://do:10.2989/16085914.2013.795886.
Nehemia, A., Maganira, J. D., & Rumisha, C. (2012). Length-Weight relationship and condition factor of tilapia species grown in marine and fresh water ponds. Agriculture and biology journal of North America, 3(3), 117-124. http://doi:10.5251/abjna.2012.3.
Ondhoro, C. C., Masembe, C. Maes, G. E., Nkalubo, W. N., Walakira, J. K., Naluwairo, J., & Efitre, J. (2016). The condition factor, Length–Weight relationship and the associated parameters of Barbus altianalis (Boulenger, 1900) fishery in Lakes Victoria and Edward basins of Uganda. Environmental Biology of Fishes, 100(2), 99–110. https://doi.org/10.1007/s10641-016-0540-7.
Lloret, J., Gilde Sola, L., Souplet, A., & Galzin, R. (2002). Effects of large-scale habitat variability on condition of demersal exploited fish in the north-western Mediterranean. ICES Journal of Marine Science, 2002(59), 1215–1227. http://doi:10.1006/jmsc.2002.1294.
Le Cren, E. D. (1951). The length-weight relationship and seasonal cycle in gonad weight and condition in Perch (Perca fluviatilis). Journal of Animal Ecology, 20(2), 201–219. http://dx.doi:10.2307/1540.
Field, A. P., & Wilcox, R. R. (2019). Robust statistical methods: a primer for clinical psychology and experimental psychopathology researchers. Behavior Research and Therapy, 98:19-38. https://doi.org/10.1016/j.brat.2017.05.013.
Boyd, C. E. (1998). Water quality for pond aquaculture: Research and Development. Auburn University, Alabama the United States of America. Series No.43. http://soiltesting.tamu.edu/publications/AU43.pdf.
Bassey, A. U., & Ajah, P. O. (2010). Effect of three Feeding Regimes on Growth, Condition Factor and Food Conversion rate of Pond Cultured Parachanna obscura (Gunther, 1861) (Channidae) in Calabar, Nigeria. Turkish Journal of Fisheries and Aquatic Sciences, 10:195-202. http://doi:10.4194/trjfas.2010.0206.
Datta, S. N., Kaur, V. I., Dhawan, A., & Jassal, G. (2013). Estimation of length-weight relationship and condition factor of spotted snake head Channa punctata (Bloch) under different feeding regimes. SpringerPlus, 2013(2):431-436. https://doi.org/10.1186/2193-1801-2-436.
Chambel, J., Severiano, V., Batista, T., Mendes, S., & Redrosa, R. (2015). Effects of stocking density and different diets on growth of Percula Clownfish, Amphiprion percula (Lacepede, 1802). Springer Plus, 2015(1), 174-183. https://doi.org/10.1186/s40064-015-0967-x.
Mollah, M. F. A. Islam, M. S., Faroque, M. A. A., & Khan, M. H. K. (1999). Minimization of cannibalism of African catfish (Clarias gariepinus Burchell) larvae in indoor culture system. Bangladesh Journal of Fisheries Resources, 6(3), 181-186. http://dx.doi.org/10.17017/jfish.v6i1.2018.280.
Bortone, S. A. (2003). Biology of the spotted sea trout: CRC Marine Biology Series. Boca Raton-Florida, the United States of America. CRC Press., 328pp. https://www.crcpress.com.
Ashley, P. J. (2007). Fish well-fare: current issues in aquaculture. Journal of applied animal behavior science, 104(4), 199-235. http://dx. doi:10.1016/j.applanim.2006.09.001.
Cajas, R. F. C., Selz, O. M., Ripmeester, R. A. P., Seehausen, O., & Maan, M. E. (2012). Species-specific Relationships between water transparency and male coloration within and between two closely Related Lake Victoria Cichlid Species. International Journal of Evolutionary Biology, 2012(1), 1-12. http://doi:10.1155/2012/161306.