Advice and Scenarios Database



Herring (Clupea harengus) in subdivisions 20-24, spring spawners (Skagerrak, Kattegat, and western Baltic)
StockCode
her.27.20-24
Assessment Year
2021
Stock Category
1.2
Purpose
Advice
Published
Stock Assessment Key
14095
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7766






Catch scenarios


Basis
Total catch
F3–6
SSB*
SSB*
% SSB change **
% advice change ***
2022 2022 2022 2023 2023 2023
(t) (ratio) (t) (t) (%) (%)
ICES Basis Advice
MSY approach: zero catch 0 0 68903 83794 22 0
Other scenarios
EU Baltic Sea multiannual plan (MAP)^: F=FMSY×SSB2021/MSYBtrigger 12499 0.134 67797 71788 6
MAP^: F=FMSYlower× (SSB2021/MSYBtrigger) 8922 0.094 68130 75182 10
MAP^: F=FMSYupper×(SSB2021/MSYBtrigger) 15017 0.164 67554 69420 3
F=FMSY 26098 0.31 66384 59264 -11
F=Fpa 32716 0.41 65595 53327 -19
F=Flim 35167 0.45 65283 51161 -22
SSB (2023)=Blim ^^
SSB (2023)=Bpa ^^
SSB (2023)=MSYBtrigger ^^
F=F2021 15811 0.174 67476 68733 2
Catch for bycatch fleets only ^^^ 5437 0.036 68464 79423 16




Symbol Footnotes
* For spring-spawning stocks, the SSB is determined at spawning time and is influenced by fisheries and natural mortality between 1 January and spawning time (April).
** SSB (2023) relative to SSB (2022).
*** The advised catch in 2021 was 0 tonnes.
^ Because SSB2021 is below MSY Btrigger, the FMSY, FMSY lower, and FMSY upper values in the MAP are adjusted by the SSB2020/MSY Btrigger ratio.
^^ Blim and Bpa cannot be achieved in 2023, even with zero catch advice.
^^^ Only the A-fleet that targets North Sea autumn-spawning (NSAS) herring and the D-fleet that targets sprat are allowed to fish, assuming the same catch as in the intermediate year 2021 (C- and F-fleets have zero catch).