Advice and Scenarios Database



Herring (Clupea harengus) in Division 7.a North of 52°30’N (Irish Sea)
StockCode (Assessment Component)
her.27.nirs
Assessment Year
2024
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
19782
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.29222585






Catch scenarios


Basis
Total catch (2025)
F2-4(2025)
Spawning-stock biomass (SSB*; 2025)
SSB*, ^ (2026)
% SSB change**
% advice change^^
Probability SSB _lt_; Blim in 2025 (%)***
2025 2025 2025 2026 2025 2025 2025
(t) (ratio) (t) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY × (SSB2024/MSY Btrigger) 3206 0.22 10853 12101 4.5 -33 13.8
Other scenarios
F=0 0 0 13183 17084 27 -100 2.9
F=FMSY= FPA 3588 0.25 10555 11555 1.7 -26 16.3
F=Fsq 6415 0.505 8480 8108 -18 33 36.2
SSB (2025)=Blim 8018 0.68 7352 6470 -29 66 50
SSB (2025)=BPA=MSYBtrigger 1946 0.128 11793 13992 14 -60 8.3




Symbol Footnotes
* For autumn-spawning stocks, the spawning-stock biomass (SSB) is determined at spawning time and is influenced by fisheries between 01January and spawning (set for September).
** SSB 2025 relative to SSB 2024 (10 383t).
*** The probability of SSB being below Blim in 2025. This probability relates to the short-term probability of SSB _lt_; Blim and is not comparable to the long-term probability of SSB _lt_; Blim tested in simulations when estimating fishing mortality reference points.
^ Assuming same catch scenario in 2026 as in 2025.
^^ Advice value for 2025 relative to the advice value for 2024 (4 821 tonnes).