Summary report on the three years research for Dissostichus spp. in Subarea 48.1 by Ukrainian vessel Calipso in 2019–2021

During three fishing seasons 2018/19, 2019/20 and 2020/21 Ukrainian vessel CALIPSO (shipowner FC NEPTUNO LLC, Ukraine) tried to perform the research survey in the statistical subarea 48.1 according to the research plans and annual management advices of the working groups FSA and Scientific Committee meetings. All three surveys were interrupted before the completion of research objectives. The first season of the research, the problem was concerned accessibility of fishing grounds due to sea-ice, the second and the third seasons of the research by-catch limit of Macrourus spp. was reached before the surveys were completed. Nevertheless, there were collected a large number of diverse scientific data on pelagic and benthic ecosystems, including high quality underwater footage, video monitoring of hauling lines and also photo and video fixation of tagged toothfish releasing.