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
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
14386
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7759






Catch scenarios


Basis
Total catch
Projected landings*
Projected discards**
Industrial bycatch
Human consumption catch
Ftotal (ages 2–4)
Fprojected landings (ages 2–4)
Fprojected discards (ages 2–4)
FIBC*** (ages 2–4) ++
SSB
% SSB change^
% TAC change ^^
% advice change^^^
2022 2022 2022 2022 2022 2022 2022 2022 2022 2023 2023 2023 2023
(t) (t) (t) (t) (t) (ratio) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY 128708 101908 25339 1460 127248 0.194 0.155 0.037 0.0021 723334 26 154 86
Other scenarios
F = FMSY lower 111702 88316 21909 1477 110225 0.167 0.133 0.031 0.0021 740295 29 120 61
F = FMSY upper# 128708 101908 25339 1460 127248 0.194 0.155 0.037 0.0021 723334 26 154 86
F = 0 (IBC only) 1586 0 0 1586 0 0 0 0 0.0021 850838 48 -100 -98
Fpa 128708 101908 25339 1460 127248 0.194 0.155 0.037 0.0021 723334 26 154 86
Flim 248379 197557 49482 1340 247039 0.384 0.309 0.073 0.0021 603983 5.4 392 259
SSB (2023) = Blim 759578 606204 152547 826 758751 1.19 0.964 0.227 0.0021 94000 -84 1412 996
SSB (2023) = Bpa = MSY Btrigger 721485 575754 144866 864 720620 1.13 0.916 0.215 0.0021 132000 -77 1336 941
F2021 79958 62944 15504 1509 78448 0.117 0.093 0.022 0.0021 771954 35 56 15
Rollover TAC 51719 40368 9814 1537 50182 0.072 0.057 0.013 0.0021 800133 40 0 -25




Symbol Footnotes
* Marketable landings.
** Including below minimum size (BMS) landings assuming recent discard rate.
*** FIBC = Fishing mortality due to industrial bycatch which is assumed to be constant in all scenarios at status quo value.
# For this stock FMSY upper = FMSY.
^ SSB 2023 relative to SSB 2022.
^^ Human consumption fishery (HCF) catch in 2022 relative to TAC in 2021: Subdivision 20 (2630 t) + Subarea 4 (42 785 t) + Division 6.a (4767 t) = 50 182 t.
^^^ Total catch 2022 relative to the advice value 2021 (69 280 t).