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
2020
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13757
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5857






Catch scenarios


Basis
Total catch
Projected landings
Projected discards
Fishing mortality F2021/FMSY
Stock size B2022/BMSY
% B change*
% TAC change^
% advice change^^
2021 2021 2021 2021 2022 2022 2022 2022
(t) (t) (t) (ratio) (t) (%) (%) (%)
ICES Basis Advice
EU MAP ^^^: FMSY 7300 6757 543 1 1.35 -12.3 -17.3 -12.6
F = MAP FMSY lower# 5700 5276 424 0.78 1.43 -7 -35 -11.6
F= MAP FMSYupper# 7300 6757 543 1 1.35 -12.3 -17.3 -12.6
Other scenarios
F= 0 0 0 0 0 1.72 11.7 -100 -100
B2022= Blim 28200 26102 2098 3.83 0.33 -79 220 238
B2022= Bpa = MSYBtrigger 13800 12774 1026 1.87 0.5 -68 56 65
F= F2020 3381 3132 249 0.39 1.54 0 -62 -60




Symbol Footnotes
* Biomass 2022 relative to biomass 2021.
# Advice value this year relative to the advice value last year for the MAP FMSY lower (6450 tonnes) and MAP FMSY upper (7300 tonnes), in % advice change^^ column
^ Total catch in 2021 relative to TAC in 2020 (8823 tonnes, which corresponds to the 2020 TAC for subareas 4 and 6).
^^ Advice value for 2021 relative to the advice value for 2020 (8350 tonnes).
^^^ EU multiannual plan (MAP) for the Western Waters (EU, 2019).