DEMERSAL BEAKED REDFISH
Sebastes mentella

Advice 2024/2025

0

tonnes

Advice 2023/2024

0

tonnes

Advice change

0 %

Publication of Advice: 7 June 2024. Published by Marine and Freshwater Research Institute.


Advice

MFRI and ICES advise that when the MSY approach and precautionary considerations are applied, catches in 2024/2025 should be 0 tonnes.

Stock Development

Fishing pressure is above FMSY, Fpa and Flim, and spawning-stock size is below MSY Btrigger, Bpa, and Blim.

0 10 20 30 40 50 60 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 Thous. tonnes I c e l a n d O t h e r s Catches 0 100 200 300 1976 1981 1986 1991 1996 2001 2006 2011 2016 2021 Millions R e c r u i t m e n t ( a g e 5 ) F M S Y F p a F l i m 0.0 0.1 0.2 0.3 0.4 0.5 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 F Fishing mortality M S Y B t r i g g e r B p a B l i m 0 100 200 300 400 500 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 Thous. tonnes SSB

Demersal beaked redfish. Catches, recruitment (age 3), fishing mortality, and spawning stock biomass (SSB). Shaded areas and error bars show 95% confidence intervals.

Basis of the assessment and reference points

Prospects

Demersal beaked redfish. Assumptions made for the interim year and in the forecast.

Demersal beaked redfish. Projection of SSB (tonnes)

Quality of assessment

The stock was benchmarked in 2023 (ICES, 2023a) and is now assessed as a category 1 stock using an age and length-based assessment model (Gadget). This has increased the quality of the assessment and improved the robustness of the advice by taking stock dynamics into account.

In 2024 an error was discovered affecting the estimates of spawning stock biomass resulting in an upward revision of the entire SSB history. It was therefore necessary to recalculate reference points. The revised Blim and Bpa were estimated higher than previously.

F M S Y F p a F l i m B l i m B p a M S Y B t r i g g e r F i s h i n g m o r t a l i t y R e c r u i t m e n t S S B 2012 2016 2020 2024 2012 2016 2020 2024 2012 2016 2020 2024 0 50 100 150 200 0 10 20 0.00 0.05 0.10 0.15 0.20

Demersal beaked redfish. Current assessment (red line) compared with previous estimates (2023).

Other information

Sebastes mentella is a slow-growing, late-maturing (>10 years) species; it is, therefore, considered particularly vulnerable to overexploitation. Since 2007, survey estimates of S. mentella have consistently shown very low abundance of pre-fishery juveniles (< 30 cm). This raises concerns about the productivity of the stock. Regardless of future recruitment levels, the SSB will continue to decline for both the short and medium term due to late maturation of this species.

Advice, TAC and Catch

Demersal beaked redfish. Recommended TAC, national TAC, and catches (tonnes).

References and Further Reading

ICES. 2023a. Benchmark workshop on Greenland halibut and redfish stocks (WKBNORTH). ICES Scientific Reports. 5:33.

Stofnmatsskýrslur Hafrannsóknastofnunar 2024. Djúpkarfi. Hafrannsóknastofnun, 7. júní 2024.