ISA suspected at AquaGen Tingvoll

A virulent variant of the ISA virus has been detected in broodfish from the Merraberget sea site at AquaGen Tingvoll.

View to the Merraberget sea site in the Tingvoll fjord.

The Atlantic salmon population in question has an average weight of about 12 kg and was planned to produce eggs from September 2017. There are a total of 14,500 broodfish at the site. There has not been any increase in mortality, and the virus detection was initially reported on 6th July 2017 as part of routine surveillance and sampling carried out by the fish-health service Åkerblå. The site is located in Tingvollfjorden and the distance to the nearest neighboring site is over 10 km.

Discovered through routine surveillance

The fish population affected has been under regular surveillance for ISA throughout the production cycle, without any previous detection of either virulent or avirulent (HPR0) ISA virus. The monitoring at the site has recently been intensified as a normal part of preparation for the stripping season. Regular samples were taken for ISA analysis in April, May and June 2017, without the virus being detected. A part of the population was transferred to the Rimstad land facility at the end of May 2017, here also in July a virulent variant of the ILA virus has been detected.

No broodfish with suspected ISA is used for egg production

This is the first ISA diagnosis at any of AquaGen’s own facilities in the company’s 45-year history. Both fish groups originating from Merraberget will be taken out of egg production if the ISA suspicion is confirmed. AquaGen’s other egg producers in Hemne and Steigen have sufficient additional capacity and will therefore be able to meet customers’ egg requirements for the egg-season 2017/2018.

Good «back-up» capacity

In our ongoing work, the focus is now on redistributing the season’s egg-production to our other sites. The AquaGen system has a good buffer and back-up capacity, designed to insure against one of our broodfish populations being taken out of production. Back-up capacity is maintained throughout the entire production cycle, including broodfish maturation and egg production. At the present time, however, we can not rule out the possibility of some consequences in terms of exact delivery time and product type, but AquaGen will keep its customers continuously informed about the situation.


For more information, please contact:

Nina Santi, CEO, AquaGen AS

Mobile: +47 411 48 138, Email:


Andy Reeve, Managing Dirctor, AquaGen Scotland

Mobile: +44 7867 748 446, Email: