Advice and Scenarios Database



Megrim (Lepidorhombus spp.) in divisions 4.a and 6.a (northern North Sea, West of Scotland)
StockCode
lez.27.4a6a
Assessment Year
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
14538
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7783






Catch scenarios


Basis
Total catch
Projected landings
Projected discards
Fishing mortality F2022/FMSY
Stock size B2023/BMSY
% B change*
% TAC change^
% advice change^^
2022 2022 2022 2022 2023 2023 2023 2023
(t) (t) (t) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach = FMSY 7350 6888 462 1 1.34 -14.1 -5.9 0.68
Other scenarios
EU MAP^^^: FMSY 7350 6888 462 1 1.34 -14.1 -5.9 0.68
F= MAP FMSY lower 5750 5389 361 0.77 1.43 -8.3 -26 -21
F= MAP FMSYupper 7350 6888 462 1 1.34 -14.1 -5.9 0.68
F=0 0 0 0 0 1.72 10.3 -100 -100
B2023=Blim 27750 26007 1743 3.75 0.34 -78 255 280
B2023=Bpa=MSYBtrigger 13800 12933 867 1.86 1.01 -35 77 89
B2023=B2022 7850 7357 493 1.06 1.32 -15.4 0.5 7.5
F=F2021 3293 3086 207 0.44 1.56 1.79 -58 -54.9




Symbol Footnotes
* Biomass 2023 relative to biomass 2022.
^ Total catch in 2022 relative to TAC 2021 (7812 tonnes).
^^ Advice value for 2022 relative to the advice value for 2021 (7300 tonnes).
^^^ EU multiannual plan (MAP) for the Western Waters (EU, 2019).