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
2020
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13330
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5920






Catch scenarios


Basis
Total catch
Ftotal
SSB *
% SSB change **
SSB *, ^
% TAC change ***
% advice change ^^
2021 2021 2021 2022 2022 2021 2021
(t) (ratio) (t) (%) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY 7341 0.266 21973 -11.3 20802 -9 -9
Other scenarios
F = 0 0 0 27315 10.2 31116 -100 -100
Fpa 7827 0.286 21621 -12.8 20200 -2.9 -2.9
Flim 10374 0.397 19773 -20.2 17204 28.6 28.6
SSB (2021) = Blim 26321 1.51 8500 -65.7 10985 226.4 226.4
SSB (2021) = Bpa 21474 1.06 11831 -52.3 13737 166.3 166.3
SSB (2021) = MSYBtrigger 21474 1.06 11831 -52.3 13737 166.3 166.3




Symbol Footnotes
* For autumn-spawning stocks, the SSB is determined at spawning time and is influenced by fisheries between 1 January and spawning (set for September).
** SSB 2021 relative to SSB 2020.
*** Catch 2021 relative to the TAC for 2020 (8064 tonnes).
^ Assuming same catch scenario in 2022 as in 2021.
^^ Advice value for 2021 relative to the advice value for 2020 (8064 tonnes).