News from SeaSalar
Reduced waterflow in a river after hydropower regulation induced evolutionary change in body size and sea-age of the Atlantic salmon population
26. October 2022

River Eira once harbored some of the largest salmon in the world, but has now evolved into an ordinary salmon population. New study shows clear evidence of an unintentional human-induced evolution.

Genetic stock identification reveals greater use of an oceanic feeding ground around the Faroe Islands by multi-sea winter Atlantic salmon, with variation in use across reporting groups
25. October 2022

While it is known that the oceans around the Faroe Islands support an Atlantic salmon feeding ground, the relative use of this resource by different age classes and populations has, until now, been largely unexplored.

They dive but they do not eat
7. June 2022

New study of adult Atlantic salmon in near-coastal areas shows that they migrate through surface waters and perform aperiodic dives - both on outward migration and return.

Time series covering up to four decades reveals major changes and drivers of marine growth during the first year at sea in an Atlantic salmon population
20. April 2022

Increased zooplankton biomass was positive for marine growth, and salmon lice negative. Data from the River Etne fish trap are published in a new study by Alison Harvey, Øystein Skaala and colleagues

Reduced extent of nutrient-rich Arctic water in the Norwegian Sea reduced the feeding and feeding conditions of Atlantic salmon
4. April 2022 New study of stomach content data over a 25-year period shows how important fish larvae are for the marine diet of young Atlantic salmon - and how feeding conditions are impacted by ocean current systems and inflow of Arctic water.
Drastic and sudden change in the Norwegian Sea led to a rapid decline in the growth of wild salmon at sea
5. March 2022

During just one year, the growth of wild salmon was greatly reduced along large parts of the Norwegian coast, particularly among populations in Western Norway and Southern Norway. Scientists have uncovered why this happened in a new study - and at the same time revealed an ecological regime shift in the Northeast Atlantic Ocean.

Rapid evolution in salmon life history induced by direct and indirect effects of fishing
24. February 2022

Congratulations to Yann Czorlich and co-authors with publishing important results on Atlantic salmon in prestigious Science!

Poor feeding opportunities and reduced condition factor for Atlantic salmon in the Northeast Atlantic Ocean
19. September 2021

During the last few decades, many wild Atlantic salmon populations have declined. One possible contributing factor for the decline is reduced prey availability at sea.

Understanding the migration routes of Atlantic salmon during their first months at sea
13. September 2021

Extensive international collaboration and analysing 30 year’s catches of salmon at sea provide new information on key foraging areas.

Atlantic salmon in a rapidly changing environment - facing the challenges of reduced marine survival and climate change
30. June 2021

The global scale of climate change, altered ocean ecosystems and reduced sea survival make these threats to Atlantic salmon diffi

Redefining the oceanic migration of Atlantic salmon
13. June 2021

Many surprises from tagging Atlantic salmon with pop-up satellite tags. Further north and east than we thought, more use of oceanic fronts, deeper dives and staying in colder water.

Do salmon post-smolts compete for food with mackerel or herring?
26. January 2021

We looked at potential competition between salmon and mackerel or herring, in a new publication. There was no evidence to support the hypothesis that lower marine survival for salmon in recent years can be explained by competition with

Reliable survival estimates based on tagged fish depend on using small enough tags
29. October 2020

PIT-tags are often used to study marine mortality in salmon. It is important that the tagging itself does not increase mortality. New review publication assessed tagging effects based on available studies.

Master thesis with exciting results on marine feeding of young salmon
8. October 2020

Lea Hellenbrecht successfully defended her master thesis at the University of Bergen in the beginning of September, on feeding of wild Atlantic salmon post-smolts in Norwegian fjords.

New collaboration expands the SeaSalar team
28. August 2020

Lo Persson has joined us as a postdoc funded by the Swedish Research Council. - A welcome Swedish-Norwegian collaboration that will strengthen the knowledge exchange between the Atlantic and Baltic, and enable new studies on how growth and genes impact age at maturity in salmon.