Advice and Scenarios Database



Turbot (Scophthalmus maximus) in Subarea 4 (North Sea)
StockCode
tur.27.4
Assessment Year
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
14296
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7879






Catch scenarios


Basis
Total catch*
Projected landings**
Projected discards***
F (projected landings. ages 2–6)
SSB
% SSB change^
% advice change^^
2022 2022 2022 2022 2023 2023 2023
(t) (t) (t) (ratio) (t) (%) (%)
ICES Basis Advice
MSY approach: FMSY 3609 3291 318 0.361 9012 -3.5 -8.6
Other scenarios
FMSY upper 4564 4162 402 0.482 8095 -13.3 15.6
FMSY lower 2634 2401 232 0.252 9957 6.6 -33
F = 0 0 0 0 0 12545 34 -100
Fpa 6984 6368 616 0.856 5821 -38 77
Fsq 3609 3291 318 0.36 9012 -3.5 -8.6
SSB (2023) = Blim 10180 9282 897 1.7 2974 -68 158
SSB (2023) = Bpa 8812 8035 777 1.27 4163 -55 123
SSB (2023) = MSY Btrigger 6410 5845 565 0.76 6353 -32 62
Rollover advice 3948 3600 348 0.4 8686 -7 0




Symbol Footnotes
* (Projected landings)/(1–average discard rate); average discard rate by weight 2018–2020 = 8.8%.
** Marketable landings.
*** Including BMS landings. assuming average discard rate by weight 2018–2020 = 8.8%.
^ SSB 2023 relative to SSB 2022.
^^ Total catch in 2022 relative to the advice value for 2021 (3948 tonnes).