Advice and Scenarios Database



Cod (Gadus morhua) in Subarea 4, Division 7.d, and Subdivision 20 (North Sea, eastern English Channel, Skagerrak)
StockCode
cod.27.47d20
Assessment Year
2019
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13211
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5640






Catch scenarios


Basis
Total catch
Wanted catch *
Unwanted catch *
Ftotal
Fwanted
Funwanted
SSB
% SSB change **
% TAC change ***
% Advice change ^
2020 2020 2020 2020 2020 2020 2021 2021 2021 2021
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: SSB (2021) = Blim 13686 10881 2805 0.17 0.131 0.039 107000 28 -61 -51
Other scenarios
MSY approach: FMSY × SSB (2020) /MSY Btrigger 13820 10986 2834 0.172 0.132 0.04 106871 28 -61 -51
F = MAP^^ FMSY-lower × SSB (2020)/MSY Btrigger 9046 7196 1850 0.11 0.085 0.025 111678 34 -74 -68
F = 0 0 0 0 0 0 0 121366 46 -100 -100
Fpa 28689 22756 5933 0.39 0.3 0.09 91399 9.7 -18.9 1.72
Flim 37587 29717 7870 0.54 0.42 0.125 82448 -1.02 6.3 33
SSB (2021) = Blim 13686 10881 2805 0.17 0.131 0.039 107000 28 -61 -51
SSB (2021) = Bpa 0 0 0 0 0 0 121366 46 -100 -100
SSB (2021) = MSY Btrigger 0 0 0 0 0 0 121366 46 -100 -100
TAC (2019) - 20% 28286 22428 5858 0.38 0.3 0.088 91851 10.3 -20 0.29
TAC (2019) - 15% 30053 23840 6213 0.41 0.32 0.095 89893 7.9 -15 6.6
TAC (2019) - 10% 31821 25186 6635 0.44 0.34 0.102 88282 6 -10 12.8
TAC (2019) - 5% 33589 26579 7010 0.47 0.36 0.108 86473 3.8 -5 19.1
Constant TAC 35358 27966 7391 0.5 0.38 0.116 84777 1.77 0 25
TAC (2019) + 5% 37125 29361 7764 0.53 0.41 0.123 82906 -0.47 5 32
TAC (2019) + 10% 38893 30719 8174 0.56 0.43 0.13 81220 -2.5 10 38
TAC (2019) + 15% 40661 32043 8618 0.6 0.46 0.137 79538 -4.5 15 44
TAC (2019) + 20% 42429 33345 9084 0.63 0.48 0.145 77831 -6.6 20 50
F = F2019 35291 27914 7377 0.5 0.38 0.116 84852 1.86 -0.187 25
F=FMSY lower 15718 12497 3221 0.198 0.152 0.046 105041 26 -56 -44
F = FMSY 23558 18688 4870 0.31 0.24 0.072 96848 16.3 -33 -16.5




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 2018.
** SSB 2021 relative to SSB 2020.
*** Catch in 2020 relative to TAC in 2019: North Sea (29 437 t) + Skagerrak (4205 t) + Eastern English Channel (1715 t) = 35 357 t.
^ Total catch 2020 relative to advice value 2019 (28 204 t).
^^ EU multiannual plan (MAP) for the North Sea (EU. 2018).
^^^ Other scenarios do not include FMSY upper because SSB(2020) is less than MSY Btrigger.