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
2020
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13515
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5884






Catch scenarios


Basis
Total catch
Projected landings *
Projected discards **
IBC ***
HCF***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 ^^^
2021 2021 2021 2021 2021 2021 2021 2021 2021 2022 2022 2022 2022
(t) (t) (t) (t) (t) (ratio) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY 69280 49061 20110 110 69170 0.194 0.158 0.035 0.0004 471256 129 66 66
Other scenarios
F = MAP# FMSY lower 60139 42609 17419 111 60028 0.167 0.136 0.03 0.0004 480443 133 44 44
F = MAP FMSY upper ## 69280 49061 20110 110 69170 0.194 0.158 0.035 0.0004 471256 129 66 66
F = 0 (IBC only) 119 0 0 119 0 0 0 0 0.0004 542133 163 -100 -100
Fpa 95457 67474 27876 107 95350 0.274 0.224 0.05 0.0004 445065 116 128 128
Flim 129323 91152 38069 102 129220 0.384 0.314 0.07 0.0004 411465 100 209 209
SSB (2022) = Blim 493824 327191 166580 52 493771 2.66 2.17 0.49 0.0004 94000 -54 1081 1081
SSB (2022) = Bpa = MSY Btrigger 436337 293347 142930 61 436276 2.06 1.68 0.38 0.0004 132000 -36 943 943
F2020 70253 49746 20397 110 70143 0.197 0.161 0.036 0.0004 470279 128 68 68
Rollover TAC 41818 29647 12057 114 41704 0.114 0.093 0.021 0.0004 498918 142 0 0




Symbol Footnotes
* Marketable landings.
** Including BMS landings. assuming recent discard rate.
*** IBC = industrial bycatch. HCF = human consumption fishery.
# EU multiannual plan (MAP) for the North Sea (EU. 2018).
## For this stock. FMSY upper = FMSY.
^ SSB 2022 relative to SSB 2021.
^^ Human consumption fishery (HCF) catch in 2021 relative to TAC in 2020: Subdivision 20 (2193 t) + Subarea 4 (35 653 t) + Division 6.a (3973 t) = 41 819 t.
^^^ Total catch 2021 relative to the advice value 2020 (41 818 t).
++ F(IBC) is assumed to be constant in all scenarios at status quo value.