Benchmark workshop on Greenland halibut and redfish stocks​ (WKBNORTH) ...

• Main Author: ICES
• Format: Report
• Language: English
• Published: ICES Scientific Reports 2024
• Subjects: Fisheries and aquaculture; Arctic Ocean ICES Ecoregion; Greenland Sea ICES Ecoregion; Icelandic Waters ICES Ecoregion; Norwegian Sea ICES Ecoregion; Oceanic Northeast Atlantic ICES Ecoregion; Arctic; Arctic Ocean; Greenland; Norwegian Sea; golden redfish; Greenland Sea; Northeast Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.22304638.v1; https://ices-library.figshare.com/articles/report/Benchmark_workshop_on_Greenland_halibut_and_redfish_stocks_WKBNORTH_/22304638/1

The objective of this benchmark process was to propose and evaluate assessment methods and the data upon which they depend for the four stocks: 1) Greenland halibut in subareas 1 and 2; 2) Greenland halibut in subareas 5, 6, 12, and 14; 3) golden redfish in subareas 5, 6, 12, and 14; and 4) beaked redfish in Subarea 14 and Division 5.a. Greenland halibut in subareas 1 and 2 was previously assessed by the AFWG-Arctic Fisheries Working Group (Greenland halibut in subareas 1 and 2) using a Gadget model, while the others were assessed by the NWWG-Northwest Working Group using either a surplus production model (Greenland halibut in subareas 5, 6, 12, and 14), a Gadget model (golden redfish), or an ICES category 3 assessment method (beaked redfish). For both Greenland halibut stocks, age data were sparse and diverse data sources were compiled to fit Gadget length- and age-based models, which was also sex dependent for Greenland halibut in subareas 1 and 2 due to sex-dependent life history variation. Both Gadget ...