Application of food waste based diets in polyculture of low trophic level fish: Effects on fish growth,water quality and plankton density |
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| Authors: | Wing Yin Mo Zhang Cheng Wai Ming Choi Yu Bon Man Yihui Liu Ming Hung Wong |
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| Institution: | 1. State Key Laboratory in Marine Pollution – Croucher Institute for Environmental Sciences, Hong Kong Baptist University and City University of Hong Kong, Hong Kong, China;2. Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, Hong Kong, China;3. Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China |
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| Abstract: | Food waste was collected from local hotels and fish feed pellets were produced for a 6 months long field feeding trial. Three types of fish feed pellets (control diet: Jinfeng® 613 formulated feed, contains mainly fish meal, plant product and fish oil; Diet A: food waste based diet without meat and 53% cereal; Diet B: food waste based diet with 25% meat and 28% cereal) were used in polyculture fish ponds to investigate the growth of fish (grass carp, bighead and mud carp), changes in water quality and plankton density. No significant differences in the levels of nitrogen and phosphorous compounds of water body were observed between 3 fish ponds after the half-year feeding trial, while pond receiving Diet A had the highest density of plankton. The food waste combination of Diet B seems to be a better formulation in terms of the overall performance on fish growth. |
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| Keywords: | Food waste Polyculture Fish feed pellets Fish growth Water quality Plankton |
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