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
2019
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13204
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5637






Catch scenarios


Basis
Total catch
Wanted catch*
Unwanted catch*
IBC**
HCF** catch
Ftotal (ages 2–4)
Fwanted (ages 2–4)
Funwanted (ages 2–4)
FIBC (ages 2–4)
SSB
% SSB change ***
% TAC change^
% Advice change^^
2020 2020 2020 2020 2020 2020 2020 2020 2020 2021 2021 2021 2021
(t) (t) (t) (t) (t) (ratio) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY 41818 25630 16157 30 41788 0.194 0.163 0.03 0.0002 196886 -3.5 23 23
Other scenarios
F = MAP^^^ FMSY lower 36257 22288 13939 30 36227 0.167 0.141 0.026 0.0002 201199 -1.39 7 7
F = MAP FMSY # upper 41818 25630 16157 30 41788 0.194 0.163 0.03 0.0002 196886 -3.5 23 23
F = 0 (IBC only) 32 0 0 32 0 0 0 0 0.0002 230173 12.8 -100 -100
Fpa 57798 35099 22671 29 57769 0.274 0.23 0.043 0.0002 184689 -9.5 70 70
Flim 78562 47057 31478 28 78534 0.384 0.32 0.06 0.0002 169349 -17 131 131
SSB (2021) = Blim 175523 93613 81888 23 175501 1.06 0.89 0.166 0.0002 94000 -54 417 417
SSB (2021) = Bpa = MSY Btrigger 129303 74032 55247 25 129279 0.69 0.58 0.109 0.0002 132000 -35 281 281
F2019 40938 25103 15805 30 40908 0.19 0.16 0.03 0.0002 197566 -3.2 20 21
Rollover TAC 33956 20899 13027 30 33926 0.156 0.131 0.024 0.0002 202994 -0.51 0 0




Symbol Footnotes
* “Wanted” and “unwanted” catch are used to describe fish that would be landed and discarded in the absence of the EU landing obligation. based on discard rate estimates for 2016–2018. Unwanted catch includes discards and below minimum size (BMS) landings. IBC = Industrial bycatch. HCF = Human Consumption fishery.
** * SSB 2021 relative to SSB 2020.
# For this stock. FMSY upper = FMSY.
^ Human Consumption fishery (HCF) catch in 2020 relative to TAC in 2019: Subdivision 20 (1 780 t) + Subarea 4 (28 950 t) + Division 6.a (3 226 t) = 33 956 t.
^^ Total catch 2020 relative to advice value 2019 (33 956 t).
^^^ EU multiannual plan (MAP) for the North Sea (EU. 2018).