The effect of difference in environmental colors on Nile tilapia (Oreochromis niloticus) production efficiency
2012
Elnwishy, N. (Suez Canal Univ., Ismailia (Egypt). Biotechnology Research Center) | Sabri, D. (Suez Canal Univ., Ismailia (Egypt). Biotechnology Research Center) | Nwonwu, F. (Tshwane Univ. of Technology, Pretoria (South Africa))
The impacts of 37 and 45 days exposure of fish to different colors (yellow, blue, green, red & darkness) on Oreochromis niloticus have been evaluated. Ten groups of tilapia (n=10) with initial body weight of 10.01 plus minus 0.15 g were reared in aquaria with four replications for each treatment. Feed intake, growth rate and energetic growth efficiency were measured in 37, 45 days interval and in 7 days recovery as well. Different treatments caused significant impacts on fish feeding, growth and survival rates. This fish showed highest growth under blue light color, followed by green while red color caused least growth in the fish. This study recommends the application of blue color lighting in aquaculture systems in order to enhance fish growth and productivity to enhance the economic efficiency of aquaculture production of tilapia in the region. This study reveals that with the potential to enhance farmers' income, aquaculture will be an attractive investment option for small scale production systems.
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