Advice and Scenarios Database



Herring (Clupea harengus) in subdivisions 20-24, spring spawners (Skagerrak, Kattegat, and western Baltic)
StockCode (Assessment Component)
her.27.20-24
Assessment Year
2025
Stock Category
1.2
Purpose
Advice
Published
Stock Assessment Key
19357
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.27202614.v1






Catch scenarios


Basis
Total catch
F3–6
SSB*
SSB*
% SSB change **
% advice change ***
2026 2026 2026 2027 2027 2026
(t) (ratio) (t) (t) (%) (%)
ICES Basis Advice
MSY approach: zero catch 0 0 75781 94275 24
Other scenarios
EU Baltic Sea multiannual plan (MAP): F=FMSY× 15612 0.13 74552 81226 9
SSB2025/MSYBtrigger ^
MAP: F=FMSYlower× 11143 0.09 74922 84904 13
SSB2025/MSYBtrigger ^
F=FMSY 33601 0.31 72885 67305 -7.7
F=Fpa 42072 0.41 71980 60882 -15
SSB (2027)=Blim ^^
SSB (2027)=Bpa ^^
SSB (2027)=MSYBtrigger^^
F=F2025 5708 0.045 75352 89539 19
Non-target catch of WBSS herring by A-fleet and D-fleet only^^^ 3548 0.026 75529 91507 21
F = 0.010 1297 0.01 75685 93194 23
F = 0.025 3211 0.025 75542 91603 21
F=0.050 6322 0.05 75304 89033 18
F=0.100 12258 0.1 74831 84178 12
F=0.150 17838 0.15 74362 79677 7.1
Constant catch 2025–2027** 4625 0.036 75435 90479 20




Symbol Footnotes
* For spring-spawning stocks, the SSB is influenced by fisheries and natural mortality between 1January and spawning time (April).
** SSB (2027) relative to SSB (2026).
*** The advised catch for 2025 was 0tonnes.
**** The forecast is deterministic.
^ Because SSB2025 is below MSYBtrigger, the FMSY and FMSYlower values in the MAP are adjusted by the SSB2025/MSYBtrigger ratio.
^^ Blim, Bpa, and MSYBtrigger cannot be achieved in 2027, even with zero catch.
^^^ Only (i) the A-fleet that targets North Sea autumn-spawning (NSAS) herring but also catches WBSS herring in the eastern part of the North Sea and (ii) the D-fleet that targets fish for reduction in Division 3.a, assuming the same catch as in the intermediate year 2025. C-fleet and F-fleet are directed WBSS herring fisheries, thus have zero catch in this scenario. Both stocks are caught under the same herring quota in the North Sea.