A NEW state-of-the-art freshwater Recirculating Aquaculture Systems (RAS) at the Marine Institute’s Newport research facility is being utilized as a part of a major research project that addresses the needs of Ireland’s aquaculture sector.
Written by: news staff / The Connaught telegraph
The four-year research project, SALMSON smolt, is investigating the potential of RAS technology to produce larger Atlantic salmon pre-smolts. The aim is to produce smolts that are more robust and also reduce the grow-out time at sea to one year.
The project is funded under the European Maritime and Fisheries Fund Knowledge Gateway Programme and is administered by Bord Iascaigh Mhara (BIM).
The Marine Institute RAS in Newport consists of eight 5.5m3 tanks with a capacity of 44,000 liters and it is capable of producing up to 12,000 Atlantic salmon pre-smolts at a time. By linking up with the Lehanagh Pool Marine Research Site at Beirtreach Buí Bay in Co. Galway, the SALMSON project will follow the performance of the smolts after they are transferred to sea and will be compared with smolts grown in conventional flow-through tanks.
One of the key objectives of the project is to ensure that this type of production is compatible with organic certification standards, as Atlantic salmon in Ireland are exclusively produced to organic certification standards.
Neil Ruane, aquaculture manager at the Marine Institute, said: “In many ways, Atlantic salmon farming has incorporated a range of technological advances, however, the production model in Ireland is still based on traditional methods. The adoption of new technologies and innovations will be vital for Ireland to remain competitive and reinforce our position as a producer of quality organic farmed Atlantic salmon.
The Mayo and Lehanagh facilities will provide an opportunity for collaboration on a variety of potential research projects and form an integral component of a marine research cluster involving third-level institutes, BIM, Údarás na Gaeltachta and the aquaculture industry.
The Newport facility has a long and distinguished record of conducting important scientific work that helps coastal communities. In recent years, advanced technology has been used there to satellite track Bluefin tuna to understand their migrations off our coast.
A new project on pollock, also, is examining the size and extent of the stocks off the west coast to see if quotas could be increased to benefit coastal communities.
The salmon lifecycle begins in freshwater, as thousands of eggs are laid in the gravel beds of fast-flowing clean rivers by adult salmon. After one to three years they reach the smolt stage, where they move downstream and begin their journey in the ocean. Atlantic salmon farming mimics this cycle, where the early phase of production begins on land in freshwater facilities for up to one year before the salmon smolts are transferred to sea for rearing in pens for up to eighteen months.
Recirculating Aquaculture Systems (RAS) are a proven technology increasingly employed in the freshwater phase of Atlantic salmon production. The system enables the fish farmer to completely control parameters such as water temperature, oxygen levels, and light, providing more stable and optimal conditions for the fish.
In recent years, a number of countries have utilized RAS for the freshwater phase of production and produced smolts of a larger size in order to reduce the length of time fish have to spend at sea.