|Contributor(s)||Laffargue Pascal, Auber Arnaud, Giraldo Carolina, Girardin Raphael, Cresson Pierre|
|Source||ICES Scientific Reports/Rapports scientifiques du CIEM (2618-1371) (ICES), 2021 , Vol. 3 , N. 69 , P. 201p.|
The International Bottom Trawl Survey Working Group (IBTSWG) coordinates fishery-inde-pendent multispecies bottom-trawl surveys within the ICES area. These long-term monitoring surveys provide data for stock assessments and facilitate examination of changes in fish distri-bution and abundance. The group also promotes the standardization of fishing gears and meth-ods and survey coordination. This report summarizes the national contributions in 2020–2021 and plans for the 2021–2022 surveys coordinated by IBTSWG. In the North Sea, the surveys are performed in quarters (Q) Q1 and Q3 while in the Northeast Atlantic the surveys are conducted in Q1, Q3, and Q4 with a suite of 14 national surveys covering a large area of continental shelf that ranges from North of Scotland to the Gulf of Cádiz. Despite the COVID-measures and bad weather, most surveys were able to complete the majority of the planned hauls. The Portuguese survey (PT-GFS-Q4) was cancelled in 2020 due to issues associated with the new vessel and a COVID-outbreak. A COVID-related delay in submitting the cruise application form for the French CGFS20 survey resulted in no authorisation to trawl in UK waters and only 70% of the core stations were completed. Issues with the UK permits, were also experienced in the North Sea surveys, only being resolved at the last moment, expected to be a returning issue. Therefore, IBTSWG addressed the permit issue in further detail in order to better evaluate the impact and propose possible solutions.
ICES (2021). International Bottom Trawl Survey Working Group (IBTSWG). ICES Scientific Reports/Rapports scientifiques du CIEM, 3(69), 201p. Publisher's official version : https://doi.org/10.17895/ices.pub.8219 , Open Access version : https://archimer.ifremer.fr/doc/00720/83229/