Experimental investigation on the transport of different fish species in a jet fish pump |
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| Affiliation: | 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Hubei Key Laboratory of Waterjet Theory and New Technology, Wuhan University, Wuhan 430072, China;3. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China;1. Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, United Kingdom;2. Department of Evolution, Ecology and Behaviour, Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom;1. Federal University of São Paulo, Department of Marine Sciences, Santos, SP, Brazil;2. Federal University of Santa Catarina, Department of Aquaculture, Marine Shrimp Laboratory, Florianópolis, SC, Brazil;1. The Conservation Fund’s Freshwater Institute, 1098 Turner Road, Shepherdstown, WV 25443, United States;2. Department of Biological Sciences, University of Alabama, 300 Hackberry Lane, Tuscaloosa, AL 35401, United States |
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| Abstract: | A jet fish pump with a throat of ø60 mm was designed to study its performance in the transport of different fish species and the physiological changes in fish thereafter. Experiments were conducted to investigate the fish transport rate and energy required to transport each ton of fish when transporting Carassius auratus, commonly known as the Chinese goldfish, Megalobrama amblycephala, or Wuchang bream, and Ctenopharyngodon idella, the grass carp. Fish were examined for external injuries as well as for several important enzymes and hormones which are indicators of tissue injury and stress. The results showed that the transport rate for all three species of fish rose dramatically with an increase in the primary stream rate. In this experiment, the transport rates of C. auratus, M. amblycephala and C. idella reached 2357 ± 37.2 kg ∙ h−1, 2888 ± 41.6 kg ∙ h−1, and 2060 ± 40.2 kg ∙ h−1, respectively. However, both injury rate and energy required to transport each ton of fish increased no matter whether the primary stream rate was too low or too high. Considering both transport rate and injury rate, the mean primary stream rate of 80 m3 ∙ h−1 was determined to be the optimal operating condition in this experiment. Fish were stressed and most likely some of their organs were damaged. However, most physiological indexes almost fully recovered after several hours. |
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| Keywords: | Jet fish pump Fish transport Fish species Aquaculture |
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