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FISHERIES_2022_OCT_SWG-DEM_35rev.pdf (1.05 MB)

Update to the hake Reference Case Operating Model with corrected longline data, and 2021 commercial and 2022 survey data

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posted on 2022-11-22, 06:27 authored by Andrea Ross-GillespieAndrea Ross-Gillespie

The hake Reference Case Operating Model is updated with two iterations: first the post-2015 longline catch data have been updated following some data validation and second the model is further updated to include the 2021 commercial catch and CPUE data as well as the 2022 survey abundance data. The impact of both changes on the assessment results is minimal. The updated Reference Case results suggest that the M. paradoxus stock is on a downward swing (the 𝐵𝑠𝑝/𝐵𝑀𝑆𝑌 estimate is 1.60 for 2021 and 1.50 for 2022), while M. capensis appears to continue on an upward trajectory (the 𝐵𝑠𝑝/𝐵𝑀𝑆𝑌 estimate is 2.63 for 2021 and 2.81 for 2022).

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Department of Mathematics and Applied Mathematics, University of Cape Town

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    Marine Resource Assessment and Management Group (MARAM)

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