Reduced growth in hybrid tilapia (Oreochromis mossambicus ×O. Niloticus) at intermediate stocking density |
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Authors: | Wang Yan Cui Yi-bo Yang Yun-xia Cai Fa-sheng |
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Affiliation: | (1) Key Laboratory of Ecology and Physiology in Aquaculture, Ministry of Agriculture of China, Shanghai Fisheries University, 200090 Shanghai, China;(2) State Key Laboratory of Freshunter Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Science, 430072 Wuhan, China;(3) Laboratory of Marine Biology, University of Shantou, 515063 Shantou, China |
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Abstract: | Hybrid tilapia were reared at densities of 1, 5 or 10 fish per tank for four weeks. Mortality was 0 at 1 and 10 fish per tank,
but was 25% at 5 fish per tank. Specific growth rate was highest at 1 fish per tank, and lowest at 5 fish per tank. The lower
growth rate at the intermediate stocking density was associated with reduced feed efficiency, but there was no reduction in
feed intake or digestibility. The results suggested increased metabolic cost caused by aggressive behaviour at intermediate
stocking density, which can be suppressed by a further increase in density.
This project was financially supported by the State Key Laboratory of Freshwater Ecology and Biotechnology of China and by
Shanghai Fisheries University (Project SFU. 200003). |
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Keywords: | growth feed efficiency stocking density tilapia |
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