Scottish Sea Farms harvested the first salmon smolts reared using a new recirculating aquaculture system (RAS) at Barcaldine, Scotland, a milestone for the company as it strengthens fish welfare and survival.

The salmon farmer put its first smolts out to sea pens for grow-out about a year ago. The smolts had an average weight of 178 grams at the time, more than double that of smolt grown by the company using traditional hatchery methods.

The £55 million (€65.3 million/$72.3 million) Barcaldine hatchery can produce up to 10 million smolts per year, which can be transferred by a pipeline to well-boats on to the Scottish Sea Farms' 42 farms in Orkney and Shetland.

The company has been able to shorten the time the salmon spend at sea by up to two months, which reduces their exposure to challenges related with the open water environment -- sea lice, escapes, disease, algal blooms -- and increases survival rates.

The facility, which includes four incubation units and four hatcheries, has taken over two years to build.