Advice and Scenarios Database



Haddock (Melanogrammus aeglefinus) in Subarea 4, Division 6.a, and Subdivision 20 (North Sea, West of Scotland, Skagerrak)
StockCode
had.27.46a20
Assessment Year
2023
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
17902
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.21840795.v1






Catch scenarios


Basis
Total catch
Projected landings
Projected discards and IBC*
Ftotal (ages 2–4)
Fprojected landings (ages 2–4)
Fprojected discards and IBC (ages 2–4)
SSB
% SSB change ^
% TAC change ^^
% advice change ^^^
2024 2024 2024 2024 2024 2024 2025 2025 2024 2024
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY 149024 126601 22423 0.24 0.184 0.056 473483 -11.3 118 17.8
Other scenarios
F = FMSY lower 118955 101191 17764 0.186 0.142 0.044 499800 -6.4 74 -6
F = FMSY upper# 149024 126601 22423 0.24 0.184 0.056 473483 -11.3 118 17.8
F = 0 0 0 0 0 0 0 604551 13.2 -100 -100
Fpa 149024 126601 22423 0.24 0.184 0.056 473483 -11.3 118 17.8
Flim 241162 204166 36996 0.43 0.33 0.101 393776 -26 252 91
SSB (2025) = Blim 555289 454909 100380 1.73 1.32 0.41 136541 -74 711 339
SSB (2025) = Bpa = MSY Btrigger 487066 403012 84054 1.28 0.98 0.3 189734 -64 611 285
F = F2023 74057 63075 10982 0.111 0.085 0.026 538888 0.93 8.1 -41
Rollover TAC 68498 58366 10132 0.102 0.078 0.024 543651 1.82 0 -46




Symbol Footnotes
* Including below minimum size (BMS) landings. Assuming recent discard rate.
# For this stock, FMSY upper = FMSY.
^ SSB 2025 relative to SSB 2024.
^^ Human consumption fishery (HCF) catch in 2024 relative to TAC in 2023: Subdivision 20 (3589 t) + Subarea 4 (58 402 t) + Division 6.a (6507 t) = 68 498 t.
^^^ Total catch 2024 relative to the advice value 2023 (126 511 t).