RAS: Does your system make the fish more robust? Or less?

Nearly all new production of farmed fish involves the use of different amounts of recycled water. This provides a more stable water quality through eg. the use of effective biofilters. The mucous membranes therefore learn to defend the fish in a fairly stable environment with a microbiology that is narrower than in normal seawater. However, particles in the water are formed from feed, excretion and contact.

In recycled water, particles are always a threat to the health of fish gills. Challenges also come in the seawater phase with delayed mortality because the fish encounters a wider microflora than it has been trained on. This means that assessments around RAS should take into account the fish’s own learning and the balance between the fish’s natural defense system and the aquatic environment.rmed fish involves the use of different amounts of recycled water. This provides a more stable water quality through eg. the use of effective biofilters.

The mucous membranes therefore learn to defend the fish in a fairly stable environment with a microbiology that is narrower than in normal seawater. However, particles in the water are formed from feed, excretion andthe mucous barrier, increased inflammation or a reduction in intestinal functions. In chronic intestinal disorders, this can be seen as a lack of mucous cells. This affects the health and growth of the fish.stinal functions. In chronic intestinal disorders, this can be seen as a lack of mucous cells. This affects the health and growth of the fish.

Water quality and microbiology in RAS-systems is a prerequisite for robust growth and low mortality.

How does your RAS-system perform?

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