Advice and Scenarios Database



Turbot (Scophthalmus maximus) in Subarea 4 (North Sea)
StockCode
tur.27.4
Assessment Year
2023
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
17828
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.21864321.v1






Catch scenarios


Basis
Total catch*
Projected landings
Projected discards**
Fprojected landings (ages 2–6)
SSB
% SSB change^
% advice change^^
2024 2024 2024 2024 2025 2025 2024
(t) (t) (t) (ratio) (t) (%) (%)
ICES Basis Advice
MSY approach: FMSY 2052 1960 92 0.361 6478 -0.27 -15.6
Other scenarios
FMSY upper 2604 2487 117 0.482 5967 -8.1 7.1
FMSY lower 1502 1435 68 0.252 6991 7.6 -38
F = 0 0 0 0 0 8411 29 -100
Fpa 3991 3811 179 0.856 4706 -28 64
F = F2023 1952 1865 88 0.34 6571 1.16 -19.7
SSB (2025) = Blim 5983 5714 269 1.71 2974 -54 146
SSB (2025) = Bpa 4601 4394 207 1.07 4163 -36 89
SSB (2025) = MSYBtrigger 2187 2088 98 0.39 6353 -2.2 -10.1
Rollover advice 2432 2323 109 0.44 6126 -5.7 0




Symbol Footnotes
* (Projected landings)/(1–average discard rate); average discard rate by weight 2020–2022=4.5%.
** Including BMS landings. Assuming average discard rate by weight 2020–2022=4.5%.
^ SSB 2025 relative to SSB 2024.
^^ Total catch in 2024 relative to the advice value for 2023 (2432 tonnes).