Jan Grimsrud Davidsen

Research scientist Department of Natural History NTNU University Museum

+47 73592293 +47 92464314 Erling Skakkes gate 47A, Schøninghuset*B111C

Background and activities

My research interests focus on life history strategies, migratory behaviour and habitat use in anadromous fishes. Especially, I am interested in how anthropogenic activities and environmental changes may affect anadromy and marine migrations in sea trout (Salmo trutta).

During our studies on sea trout, we try to reveal the underlying causes between different marine migratory strategies. Examples of research questions are if aquaculture, water temperature or levels of salinity influence migratory behaviour, habitat use or growth in the marine environment. Such information will be important in order to evaluate if dynamic environmental changes may confine the marine feeding migration of sea trout.

By use of methods such as acoustic telemetry and passive integrated transponder (PIT) tags individual fish are followed in the marine and freshwater environment for several years. Analyses of scales, stomach contents, marine parasites and stable isotopic ratios are further used to bring information about marine growth rates and feeding.

Several of our projects are conducted in cooperation with e.g. Norwegian Institute for Nature Research, Dalhousie University/Ocean Tracking Network (Canada), Technical University of Denmark, UiT the Arctic University of Norway, Institut national de la recherche agronomique or the French Polar Institute.

Scientific, academic and artistic work

A selection of recent journal publications, artistic productions, books, including book and report excerpts. See all publications in the database

Journal publications

Part of book/report

  • Davidsen, Jan Grimsrud; Daverdin, Marc; Sjursen, Aslak Darre; Rønning, Lars; Arnekleiv, Jo Vegar; Koksvik, Jan Ivar. (2014) Gir redusert fôrmengde bedre vandringsvillighet hos klekkeriprodusert ørretsmolt?. Årbok og fiskeguide 2013-2014.
  • Davidsen, Jan Grimsrud; Arnekleiv, Jo Vegar; Koksvik, Jan Ivar. (2013) Vandringsatferd hos sjøørret i Nidelva. Årbok og Fiskeguide 2012-2013.
  • Halttunen, Elina; Rikardsen, Audun; Davidsen, Jan Grimsrud; Thorstad, Eva B.; Dempson, Brian J.. (2009) Survival, migration speed and swimming depth of Atlantic salmon kelts during sea entry and fjord migration. Tagging and Tracking of Marine Animals with Electronic Devices.

Postal address

Department of Natural History Norwegian University of Science and Technology 7491 Trondheim Norway