EUROFLEETS+ SYNERGY

The RV Arni Fredriksson collected simultaneous information on hydrology, prey and Brunnichs/common guillemot from 18 to 25/06/2022 in north-west Iceland. 5 transects of 60km length were succesfully completed twice in shelf-waters. A 6th transect of ~ 40km length was performed once in Arnarfjordur. During transects, 2 observers recorded the 2D distribution of all seabirds using European Seabird At-Sea (ESAS) methodology. At the same time, a scientific echosounder (Simrad EK80) operating at 5 frequencies (18, 38, 70, 120, 200 Khz) recorded the 3D distribution of fish. 22 trawls (plankton, midwater and demersal) were performed in response to schools and layers detected in the scientific echosounder, offering insights into their species composition and length-frequencies. 107 CTDs were performed at intervals along transects to measure the 3D variation in temperature, salinity, flourescene and turbidity.