The lake Mjøsa and Gudbrandsdalslågen system
The lake Mjøsa in southern Norway has been studied intensively for several decades because of a number of human encroachments that have drastically changed the ecosystem. The main tributary river, Gudbrandsdalslågen, is spawning and nursery habitat for important fish populations targeted by recreational fisheries. Connectivity within the system is reduced, and water flow and temperature are changing. The fish community is complex, with the most important species being brown trout Salmo trutta. Relevant data on the various parts of the ecosystem have been collected, and are available to this collaborative project. The large-sized brown trout is of particular interest, being a top predator and exposed to environmental variation both in the river and lake. Mark-recapture data has been collected annually since 1966 along with detailed individual life-history information.
Published July 21, 2016 1:06 PM - Last modified Sep. 21, 2016 11:44 AM