Photo: DTU Aqua

Cod fishing in the Sound

The REKREA project is collecting data on catches and the duration of fishing trips from recreational fishermen in the Sound (Øresund), and also involves taking biological samples from cod.

What information is collected?

The REKREA project is examining recreational cod fishing in the Sound (ICES statistical area 23) to establish a better basis for managing the western Baltic cod which is being caught by both recreational and commercial fishermen. The aim is to ensure healthy fish stocks, also in future.

The REKREA project needs information about the number of cod which are being caught as well as the length and weight of the fish. In addition, the researchers will remove otoliths from f the cod to determine their age.

The survey includes fish which are landed as well as those which are released back into the sea.

How is data collected?

The data is basically being collected in three ways:

  • Fishing tour boat surveys, where DTU Aqua interviews anglers on board fishing boats and records their catches, as well as taking biological samples.  

  • Private boat surveys (access point survey), where DTU Aqua interviews recreational fishermen when they return to shore, for example at slipways. Here, the catch is also registered, and biological samples collected.

  • Questionnaire-based surveys, where DTU Aqua collects information on what is important for individual anglers in relation to, for example, the management of fish stocks.

Catches from land and from recreational fishing using traps are initially being excluded from this part of theREKREA project. However, the project will carry out individual roving creel surveys to screen for the significance of these types of fishing.

Participation is of course voluntary. However, we hope that as many people as possible will spare a few moments of their time to help us. 

What will the information be used for?

The information which the REKREA project collects about cod fishing in the Sound will be compared with the results from the questionnaire-based surveys of recreational fishing which DTU Aqua already conducts twice a year in collaboration with Statistics Denmark.

The aim is to improve the precision of the catch estimates which we receive from the questionnaire-based surveys, and at the same time collect biological data in the form of fish lengths, weights and otoliths.

The REKREA project’s biological data on cod will be used to create an age-length key for cod for use in recreational fishing. This will then be used when data on cod catches by recreational fishermen are included in the stock assessments of the western Baltic cod. 



Hans Jakob Olesen
DTU Aqua
+45 21 15 42 53
17 OCTOBER 2021