Database for Survey test-fishing - NORS

Last changed: 16 August 2023
Perch in aquarium at Baltic Science Sea Center, Skansen. Photo.

The Department of Aquatic Resources collects, quality assures and stores test-fishing data generated in national and regional environmental programs. The database for survey test-fishing (NORS) contains data from test fishing in thousands of lakes. The database is in Swedish.

Standardized test-fishing with Nordic multi-mesh gillnets is a widely used method in Sweden to investigate the fish fauna in a lake. The nets, consisting of 12 mesh sizes, catch most of the Swedish species in a representative way, giving a good estimate of species abundance and size distribution. The results are used for purposes of environmental protection and fishery management. In 2005 the method became an European standard (EN 14757).

The database consists of thousands of test-fishing occasions back to the 1950’s. The Department of Aquatic Resources is responsible of collecting and checking test-fishing data generated in national and regional environmental programs, on behalf of the Swedish Agency for Marine and Water Management. We also collect test-fishing data from several other types of investigations in order to create a database as representative as possible. The purpose is to facilitate obtaining data of high quality for national investigations and reports.

The database also serves as a reference for local and regional investigations. All data is available for the public.

The database is cited as:

National Register of Survey test-fishing - NORS. yyyy. Swedish University of Agricultural Sciences, Department of Aquatic Resources. [yyyy-mm-dd].


Descriptions of data and instructions for searching the database NORS
Primary data from NORS can also be ordered by e-mail from the address below.


Anders Kinnerbäck, Environmental Monitoring and Assessment Analyst
Department of Aquatic Resources, Institute of Freshwater Research, SLU, +46 10 478 42 34