This report summarises the 2024 stock assessment of one of the five main ling stocks managed under the Quota Management System: the Sub-Antarctic ling stock, defined as LIN 5&6 and including LIN 6B for the first time.

 

A stock assessment model was carried out, informed by commercial catches, commercial age compositions, and information from the Sub-Antarctic Tangaroa trawl survey biomass series.

 

The initial spawning stock biomass (B0) for both the base case model was estimated to be about 204 630 t and stock status in 2024 was estimated at 66% B0.

 

Five-year projections were done using the base case model, assuming various future recruitment and annual catch options. Projected stock status in 2029 was expected to be above the target of 40% B0 in all instances, however the exploitation rate in LIN 5 was expected to exceed the target exploitation rate if the catch in LIN 5 was increased by more than 20%.

Document date
Friday, 15 November 2024

Document type
V 1.3

File format
Adobe PDF

File size
4.3 MB

Reference number
2024/84

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AUTHOR: Mormede, S.; Dunn, A.; Webber, D.N.;

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