To assure the quality of the data collected within DCF a number of measures are taken, concerning sampling design, sampling routines, quality checks and evaluation of eg accuracy. How you can find documentation of quality assurance measurements for different samplings schemes are described here.
Sampling design and quality controls for different sampling schemes are described in the National program of DCF.
National program 2020-2021
Tables from the national plan 2020-2021
Sampling design is found in text box 4A in the National program.
In the end of Text box 4A, information on data storage and quality assurance is listed for all sampling schemes.
Quality checks that are made on data reigisterer in the database FD2 are found here (though in Swedish so far).
Quality documents for sampling of salmon and sea trout:
Data collection of salmon and sea trout, stocked amounts and sites (sampling strategy and data form)
Recreational river catch survey
River sampling, Salmon and trout parr counts (manual, environmental quality criteria, processes to evaluate data accurcy)
River sampling, salmon smolt counts (manual, mark-recapture estimation, pictures of smolt stages for identification)
National database for electrofishing:
The Swedish Electrofishing Register (SERS). Contains manuals for how to perform electrofishing, information on how to retrieve data from SERS, education and permits for electrofishing, and more. Some of the content is available in English, some only in Swedish so far.