• International Blue Whiting Spawning Stock Survey (IBWSS) Spring 2012

      Marine Institute, Institute for Marine Resources & Ecosystem Studies; Institute of Marine Research, PINRO; Faroe Marine Research Institute, Marine Scotland Marine Laboratory; Johann Heinrich von Thünen-Institut, Danish Institute for Fisheries Research (Marine Institute, 2012)
      Coordination of the survey was initiated in the meeting of the Working Group on Northeast Atlantic Pelagic Ecosystem Surveys (WGNAPES, ICES 2011) and continued by correspondence until the start of the survey. During the survey, updates on vessel positions and trawl activities were collated by the survey coordinator and distributed to the participants twice a day. The survey design used and described in ICES (2011) allowed for a flexible setup of transects and good coverage of the spawning aggregations. Due to favourable weather conditions throughout the survey period and full vessel availability, the survey resulted in a high quality coverage of the stock. Transects of all vessels were consistent in spatial coverage and timing, delivering full coverage of the respective distribution areas within 2 weeks.
    • International Blue Whiting Spawning Stock Survey (IBWSS) Spring 2022

      Marine Institute; Wageningen Marine Research; Institute of Marine Research; Faroe Marine Research Institute, Marine Scotland Marine Laboratory; Johann Heinrich von Thünen-Institut, Danish Institute for Fisheries Research; Spanish Institute of Oceanography (Marine Institute, 2022)
      Coordination of the survey was initiated at the meeting of the Working Group on International Pelagic Surveys (WGIPS) in January 2022 and continued by correspondence until the start of the survey. During the survey, effort was refined and adjusted by the survey coordinator (Norway) using real time observations. Survey design was based on methods described in ICES Manual for International Pelagic Surveys (ICES, 2015). Overall, weather conditions were exceptional compared to 2021, with calm seas prevailing, providing optimal conditions for acoustic recordings. The entire survey was completed in 15 days, well below 21-day target threshold (Figure 4). Area coverage was considered comprehensive in both core and peripheral areas, with all vessels completing the planned routes, with the exception of the RV Celtic Explorer (Ireland) which returned to port 8 days early.