Aquatraz - safeguarding your fish

Launching Aquatraz G3

On Friday, April 24, Mid-Norwegian Aquaculture received the fourth Aquatraz cage, which is the third design generation, G3.

After the hand-over, the cage was towed to Kipholman location in Nærøy municipality. There it was implemented a further 10 meter of lice skirt, totalling 18 meter of lice skirt.

The extension in the lice skirt consists of non-permeable tarpaulin in the side panels of the cage. Tarpaulin has also been implemented at the bottom of the cage, extending three meters from each side along the bottom net. In total, these changes contribute to improved internal water circulation and an increase in the proportion of deep water that is pulled into the cage. This will provide improved fish health and a further reduction in lice.

– The positive experiences with the water supply system for the first and second generation cages have enabled an increase in the skirt depth to as much as 18 meters for generation three, and thus improved protection from lice, without posing any risk to the fish, Holm summarizes.

Steingrim Holm, MNH

The first two generations, Aquatraz G1 & G2 have proven that the technology works well. The biological results have also been positive, with far less lice compared to conventional fish cages with lice skirts. With the new G3 we improve the protection against lice even further.

Aquatraz G3 with 18 meter lice skirt.
Aquatraz G3 with 18 meter lice skirt implemented.

The positive results from Aquatraz G1 and G2 include few lice, firmer fish fillets and improved coloring. In addition, the cage has far fewer manual operations and thus improved HSE. Aquatraz G3 is expected to deliver better than its predecessors at all points, but particularly regarding lice and fillet quality.

The Aquatraz G3 is equipped with an emergency power unit that starts automatically in the event of power failure, ensuring water quality in the cage at all times. A heated storage container has also been installed to streamline the daily operation of the cage.

About the road ahead Sandstad reveals:
– When setting out fish in Aquatraz G3 in May, we expect to document the good effects of deeper skirts and better water exchange during the summer. The results from this summer will then be included in the final phase of design for the fourth and last generation Aquatraz.

Launching Aquatraz G3