Results for Greenland halibut survey in NAFO Divisions 1C-1D for the period 1997-2017, 2019 and 2022-2023
Abstract
Greenland initiated a survey series in 1997 covering NAFO Divisions 1CD at depths between 400 and 1500 m. The survey was conducted with R/V Paamiut, using and Alfredo III gear. In 2017, R/V Paamiut was retired and no survey was conducted in 2018. In 2019, the annual trawl survey was conducted with a chartered vessel, the C/V Helga Maria. All the standard gear from the research vessel Paamiut were used, in order to make the 2019 survey as identical as possible to the previous years’ surveys, but the gear was working differently at depths > 700m. No vessel has been available during the years 2020 and 2021 to conduct the survey. From 2022 the survey has been carried out with a new vessel owned by the GINR, R/V Tarajoq using also a new trawl gear, Bacalao 476. There were unfortunately not been any comparative trawling between the old vessel R/V Paamiut and R/V Tarajoq. The survey was designed as a Stratified Random Bottom Trawl Survey aimed primarily at Greenland halibut (Reinhardtius hippoglossoides) and roundnose grenadier (Coryphaenoides rupestris). The paper gives biomass and abundance estimates and length frequencies for Greenland halibut, roundnose grenadier, roughhead grenadier (Macrourus berglax), and deep sea redfish (Sebastes mentella) together with a list of recorded fish species. In 2023, 67 valid hauls were conducted.
