Cruise report hydro acoustic survey for blue whiting (Micromesistius poutassou) with R.V. Tridens, 17 March - 04 April 2008

• Main Authors: Ybema, M.S., Bakker, C., Pasterkamp, T.L., Armstrong, E., Tijssen, D., Kloppmann, M., Freijser, J.
• Format: Report
• Language: English
• Published: IMARES 2008
• Subjects: atlantic ocean; fishery resources; fishing grounds; inventories; micromestistius poutassou; whiting; atlantische oceaan; inventarisaties; visbestand; visgronden; wijting; North East Atlantic
• Online Access: https://research.wur.nl/en/publications/cruise-report-hydro-acoustic-survey-for-blue-whiting-micromesisti-2

This is the report of the Dutch part of the international North East Atlantic hydro acoustic survey for blue whiting. The survey is coordinated by ICES and has been executed annually. The purpose of the survey is to estimate the blue whiting stock of the North East Atlantic. The ICES uses this estimation is as a “tuning index” to assess the North East Atlantic blue whiting stock. The applied method was echo integration. By sailing transects over the survey area, the total acoustic cross-section can be calculated by surface area sampled. Trawling identified species composition of localized schools. The length composition of each species was determined. Blue whiting was examined on age and fecundity from which a split up stock structure was made