AQUI-S® is a water dispersible liquid anaesthetic for fin fish, crustacea and shell fish. It is particularly useful for the rested harvesting of fish, but can also be used for most animal husbandry and transport applications.
AQUI-S® is mixed directly with water to form a stock solution which is then dispersed in the water column. Most applications require a concentration of between 15 and 20 mg/L in an immersion bath to achieve anaesthetisation. Lower doses are used for light sedation. Higher doses can be used to achieve rapid response. Response to the anaesthetic depends on the species, the age, level of fatigue and condition of the animals and environmental factors.
Well rested mature salmon (Salmo salar and Oncorhynchus tshawytscha) can take between 5 and 8 minutes of exposure at 17 mg/L of AQUI-S® before showing signs of loss of equilibrium, and most husbandry practices can be carried out after 12 to 15 minutes exposure. However much shorter response times of approximately 2 to 5 minutes to produce handleable fish can be obtained by working with higher concentrations. Fish that are not rested often have a faster response to the anaesthetic.
In commercial applications the concentration is adjusted to achieve the response time that matches the ability to handle the animals. Handling systems have been designed to handle up to 10 tonne/hour of fish with treatment response times of 10 to 20 minutes.
Fish that has been treated with AQUI-S®
For more information please contact AQUI-S New Zealand Ltd or our distributor in Norway (ScanAqua A.S.)
Var Ref.: 10/22644-45
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