Intrinsic settling rate and spatial diffusion properties of extruded fish feed pellets |
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| Affiliation: | 1. Department of Engineering Cybernetics, Norwegian University of Science and Technology (NTNU), O. S. Bragstads plass 2D, NO-7491 Trondheim, Norway;2. Nofima, Sjølsengvegen 22, NO-6600 Sunndalsøra, Norway;3. SINTEF Fisheries and Aquaculture, NO-7465 Trondheim, Norway;4. Nofima, NO-5828 Bergen, Norway;1. Marine Algal Research Station, CSIR-Central Salt & Marine Chemicals Research Institute, Mandapam Camp – 623 519, India;2. Wind Engineering Laboratory, CSIR-Structural Engineering Research Centre, Taramani, Chennai, 600113, India;3. Shock and Vibration Group, CSIR-Structural Engineering Research Centre, Taramani, Chennai, 600113, India;4. Division of Marine Biotechnology and Ecology, CSIR- Central Salt & Marine Chemicals Research Institute, Bhavnagar, 364002, India;5. Academy of Scientific and Innovative Research (AcSIR), CSIR, New Delhi, 110 001, India;1. College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, UK;2. National Lobster Hatchery, Padstow, Cornwall, UK;1. Agriculture Ministry Key Laboratory of Healthy Freshwater Aquaculture, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou, 313001, China;2. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, 430070, China;3. Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China;1. Faculty of Marine Science and Technology, University of Hormozgan, P.O. Box 3995, Bandar Abbas, Iran;2. Department of Modern Technologies, Mangrove Forests Research Center, University of Hormozgan, Bandar Abbas, Iran;3. Iranian Fisheries Science Research Institute, Shrimp Research Center, Agricultural Research Education and Extension Organization (AREEO), Bushehr, Iran;4. Department of Chemistry, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran;5. Fisheries Department, Natural Resources Faculty, University of Kurdistan, Zip Code: 66177-15175, P.O. Box 416, Sanandaj, Kurdistan, Iran;1. Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Departamento de Aquicultura, Laboratório de Camarões Marinhos, Servidão dos Coroas, 503, Barra da Lagoa, Florianópolis, SC, CEP 88061-600, Brazil;2. Instituto Federal Catarinense Campus de Araquari, Rodovia BR 280, km 27, Araquari, SC, CEP 89245-000, Brazil;1. Department of Chemistry and CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;2. Department of Applied Chemistry and Physics, IMARENABIO, University of Léon, Campus de Vegazana, Léon, Spain;3. Environmental and Planning Department and CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal |
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| Abstract: | Spatial and temporal feed distribution in sea cages are important factors for the farmer, fish and environment due to the strong relation to growth, feed loss, pollution and welfare. This study presents a set of experimentally derived diffusion parameters and settling rates obtained in still water from four sizes and three densities of extruded fish feed pellets commonly used in aquaculture. It was found that pellet size is positively correlated with increased diffusion and that pellet density plays a less important role. Both the size and density of pellets had a significant impact on the settling rate. Results are compared to values obtained during feed production as well as other relevant studies. The findings suggest that parameters related to hydrodynamic behaviour of groups of feed pellets may vary across different pellet types. The results may be applied to refine and parameterize pellet motion in sea cage feeding models, improving estimates of fish behaviour, growth and feed loss. |
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| Keywords: | Aquaculture Extruded feed pellets Pellet distribution modelling Pellet settling rate and diffusion |
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