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
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
16728
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7770






Catch scenarios


Basis
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#
Total stock catch
SSB 2022
SSB 2023**
%SSB change ***
A-fleet **** %TAC change
% Advice change ^
2022 2022 2022 2022 2022 2022 2022 2022 2022 2022 2022 2022 2023 2023 2023 2023
(ratio) (ratio) (ratio) (ratio) (ratio) (ratio) (t) (t) (t) (t) (t) (t) (t) (%) (%) (%)
ICES Basis Advice
MSY approach 0.31 0.051 0 0 0.31 0.053 523438 8745 0 0 532183 1280829 1286757 -7.4 47 45
Other scenarios
F=FMSY 0.31 0.051 0 0 0.31 0.053 523438 8745 0 0 532183 1280829 1286757 -7.4 47 45
F=0 0 0 0 0 0 0 0 0 0 0 0 1614283 1998030 17 -100 -100
No change in TAC^^ 0.197 0.032 0.006 0.002 0.2 0.039 356357 5619 6405 351 368732 1387630 1481508 0.3 0 0.8
F=F2021 0.186 0.031 0 0 0.186 0.032 339749 5334 0 0 345083 1401049 1513391 1.3 -4.7 -5.7
Fpa 0.31 0.051 0 0 0.31 0.053 523438 8745 0 0 532183 1280829 1286757 -7.4 47 45
Flim 0.4 0.066 0 0 0.4 0.069 640910 11169 0 0 652079 1202140 1153649 -13 80 78
SSB2022=Bpa 0.743 0.122 0 0 0.744 0.128 995805 19986 0 0 1015791 956483 802300 -31 179 178
SSB2022=Blim 0.886 0.146 0 0 0.887 0.153 1111504 23480 0 0 1134984 874198 703021 -37 212 210
SSB2022=MSYBtrigger 0.364 0.06 0 0 0.364 0.063 595343 10204 0 0 605547 1232828 1204229 -10.9 67 66
MSY approach^^ with Fages0-1=0.05 target 0.31 0.047 0 0 0.31 0.05 523477 8162 0 0 531639 1280829 1286893 -7.4 47 45
MSY approach with C- and D-fleet catches and C-fleet TAC transfer 0.314 0.05 0.003 0.002 0.316 0.057 529663 8653 3330 351 541997 1275260 1274284 -7.8 49 48
MSY approach with C- and D-fleet catches and no C-fleet TAC transfer 0.307 0.05 0.006 0.002 0.31 0.059 519293 8653 6405 351 534702 1280821 1281588 -7.4 46 46




Symbol Footnotes
* For autumn-spawning stocks, the SSB is determined at spawning time and is influenced by fisheries between 1 January and spawning.
** Assuming same catch scenario in 2023 as in 2022.
*** SSB (2022) relative to SSB (2021).
**** A-fleet catches (2022) relative to TAC 2021 for the A-fleet (356 357 tonnes).
# The catch for C- and D-fleets are set to zero because of the zero catch advice given for 2022 for the western Baltic spring-spawning herring stock.
^ Advice value 2022 relative to advice value 2021, using catches for all fleets (365 792 tonnes).
^^ Based on the agreed TACs for A-, C-, and D-fleets in 2021, the average proportion in 2018–2020 of NSAS herring in the catch (for A-, C-, and D-fleets), no C-fleet TAC transfer to the A-fleet, and the average uptake in 2018–2020 of the bycatch quota (for B- and D-fleets).