Aquafeeds

Fishmeal-free Atlantic salmon feed formulation shows promise

A recent study evaluated the effects of a fishmeal-free diet on Atlantic salmon performance and fillet quality during successful growout to market-size in a commercial-scale, land-based, closed-containment system using water recirculation technology. Test fish performed well, with 97 percent survival during the 10-month growout period. 

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Crowder/grader units improve harvest efficiency in large circular tanks
Article image for Crowder/grader units improve harvest efficiency in large circular tanks

Health & Welfare

Crowder/grader units improve harvest efficiency in large circular tanks

The use of larger and deeper tanks can reduce building, labor and other aquaculture production costs. However, the ability to grade and transfer large numbers of fish is more challenging when using large tanks. In a comparison of the effectiveness of a purse seine and a hinged clamshell to crowd fish in large tanks, the latter was easier to control and less stressful to salmonids. With a slotted bar rack in a side panel of the clamshell crowder, fish were simultaneously graded in size.