CO2 technology that anesthetises fish for long-distance transportation is almost ready for real-life application.
In the field of fish culturing, anaesthetic agents for animals are commonly used in vaccination, labelling, and various measurements. However, no agents have been able to achieve long-duration anaesthesia in fishes. The use of traditional anaesthetic agents for animals in the fishery is not desirable in terms of environmental protection because the discarded solutions directly enter oceans and rivers.
The method of quiescent fish by immersion in cold water with no anaesthetic agent has been approved, but it is not widely used due to the need to install large refrigeration systems, which consume large quantities of electrical power.
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