Advice and Scenarios Database



Four-spot megrim (Lepidorhombus boscii) in divisions 8.c and 9.a (southern Bay of Biscay and Atlantic Iberian waters East)
StockCode
ldb.27.8c9a
Assessment Year
2023
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
18172
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.21840912.v1






Catch scenarios


Basis
Total catch (2024)
Projected landings (2024)
Projected discards (2024)
Fages 2–4 Total
Fages 2–4 Projected landings
Fages 1–2 Projected discards
SSB
% SSB change*
% advice change^
2024 2024 2024 2024 2024 2024 2025 2025 2025
(t) (t) (t) (ratio) (ratio) (ratio) (t) (%) (%)
ICES Basis Advice
EU MAP^^: FMSY 2351 2186 165 0.176 0.113 0.049 11371 -13.4 3
F = MAP^^ FMSY lower 1640 1526 114 0.119 0.076 0.033 12126 -7.6 2.8
F = MAP^^ FMSY upper 3537 3284 253 0.28 0.179 0.078 10117 -23 3.4
Other scenarios
MSY approach = FMSY 2351 2186 165 0.176 0.113 0.049 11371 -13.4 3
F = 0 0 0 0 0 0 0 13877 5.7 -100
Fpa 5291 4902 389 0.46 0.295 0.129 8277 -37 132
Flim 6107 5651 456 0.558 0.357 0.153 7428 -43 168
SSB (2025) = Bpa 10564 9677 886 1430 0.914 0.4 2932 -78 360
SSB (2025) = Blim 11203 10238 965 1660 1060 0.46 2321 -82 390
SSB2025 = SSB2024 699 651 48 0.049 0.031 0.013 13130 0 -69
SSB (2025)= MSYBtrigger 10564 9677 886 1430 0.914 0.4 2932 -78 360
F = F2023 1166 1085 81 0.083 0.053 0.023 12632 -3.8 -49




Symbol Footnotes
* SSB 2025 relative to SSB 2024.
** Advice value for 2024 relative to advice value for 2023 (2282 tonnes).
^^ The EU multiannual plan (MAP; EU, 2019).
^^^ Advice value for 2024 relative to the advice value for 2023 for the FMSY lower (1595tonnes) and FMSYupper (3421tonnes).