Advice and Scenarios Database



Herring (Clupea harengus) in Subarea 4 and divisions 3.a and 7.d, autumn spawners (North Sea, Skagerrak and Kattegat, eastern English Channel)
StockCode
her.27.3a47d
Assessment Year
2022
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
17286
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.19447985.v1






Catch scenarios


Basis
Total stock catch
Biomass* SSB
Biomass* SSB**
Biomass* %SSB change ***
Biomass* A-fleet **** %TAC change
% Advice change ^
F values by fleet and total A-fleet Fages (wr) 2–6
F values by fleet and total B-fleet Fages (wr) 0–1###
F values by fleet and total C-fleet Fages (wr) 1–3
F values by fleet and total D-fleet Fages (wr) 0–1
F values by fleet and total Total Fages (wr) 2–6
F values by fleet and total Total Fages (wr) 0–1
NSAS catches by fleet A-fleet
NSAS catches by fleet B-fleet
NSAS catches by fleet C-fleet#
NSAS catches by fleet D-fleet#
2023 2023 2024 2024 2024 2024 2023 2023 2023 2023 2023 2023 2023 2023 2023 2023
(t) (t) (t) (%) (%) (%) (ratio) (ratio) (ratio) (ratio) (ratio) (ratio) (t) (t) (t) (t)
ICES Basis Advice
MSY approach (FMSY * SSB2023/MSY Btrigger) 414886 1117094 1005280 -9.9 -5.6 -22 0.28 0.05 0 0 0.28 0.05 403813 11073 0 0
Other scenarios
F=FMSY 451023 1094001 964099 -12 2.6 -15 0.31 0.06 0 0 0.31 0.06 438848 12175 0 0
F=0 0 1372327 1548998 11 -100 -100 0 0 0 0 0 0 0 0 0 0
No change in TAC^^ 448664 1096000 962258 -12 0 -16 0.3 0.05 0.01 0 0.31 0.07 427628 11821 8885 330
F=F2022 401693 1125489 1020557 -9.2 -8.6 -25 0.27 0.05 0 0 0.27 0.05 391016 10677 0 0
Fpa 451023 1094001 964099 -12 2.6 -15 0.31 0.06 0 0 0.31 0.06 438848 12175 0 0
Flim 556020 1026066 849918 -17 26 4.5 0.4 0.07 0 0 0.4 0.08 540487 15533 0 0
SSB2023=Bpa 661577 956483 743240 -23 50 24 0.5 0.09 0 0 0.5 0.09 642407 19170 0 0
SSB2023=Blim 783883 874198 629634 -30 78 47 0.63 0.11 0 0 0.63 0.12 760120 23763 0 0
SSB2023=MSYBtrigger 230313 1232828 1230894 -0.6 -48 -57 0.15 0.03 0 0 0.15 0.03 224496 5817 0 0
MSY approach^^ with Fages0–1=0.05 target ## 414323 1117093 1005463 -9.9 -5.6 -22 0.28 0.05 0 0 0.28 0.05 403880 10443 0 0
MSY approach with C-fleet catches and C- and D-fleet TAC transfer^^^ 434127 1106309 984896 -11 -1.9 -18 0.29 0.07 0 0 0.29 0.07 419564 14160 403 0
MSY approach with C- and D-fleet catches and no C- and D-fleet TAC transfer 415681 1117074 999916 -9.9 -7.5 -22 0.27 0.05 0.01 0 0.28 0.06 395645 10821 8885 330




Symbol Footnotes
* For autumn-spawning stocks, the SSB is determined at spawning time and is influenced by fisheries and natural mortality between 1 January and spawning.
** Assuming same catch scenario in 2024 as in 2023.
*** SSB (2023) relative to SSB (2022).
**** A-fleet catches (2023) relative to TAC 2022 for the A-fleet (427 628 tonnes).
# The catch for C- and D-fleets are set to zero because of the zero catch advice given for 2023 for the western Baltic spring-spawning herring stock.
## B-fleet fishing pressure set independently on change in the A-fleet fishing pressure (ICES, 2022)
### Fishing pressure inclusive of catches induced by D- fleet transfer.
^ Advice value 2023 relative to advice value 2022, using catches for all fleets (532 183 tonnes).
^^ Based on the agreed TACs for A-, C-, and D-fleets in 2022, the average proportion in 2019–2021 of NSAS herring in the catch (for A-, C-, and D-fleets), no C- and D- fleet TAC transfer to the North Sea, and the average uptake in 2019–2021 of the bycatch quota (for B- and D-fleets).
^^^ Includes a C-fleet transfer of 23 885 t (in NSAS catches by fleet A-fleet column)