Advice and Scenarios Database



Undulate ray (Raja undulata) in divisions 7.d and 7.e (English Channel)
StockCode (Assessment Component)
rju.27.7de
Assessment Year
2022
Stock Category
2
Purpose
Advice
Published
Stock Assessment Key
17647
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.19754482.v1






Catch scenarios


Basis
Total catch
Fishing mortality F2023/FMSY
Stock size B2024/MSYMSY
% biomass change^
% advice change^^
2023 2023 2024 2024 2024
(t) (ratio) (ratio) (%) (%)
ICES Basis Advice
MSY approach (15th percentile of predicted catch distribution under F = FMSY) 4836 0.58 1.74 -3.6 89
Other scenarios
F = FMSY 8175 1 1.66 -8 220
F = F2021 = Fsq 662 0.077 1.84 1.82 -74
F = 0 0 0 1.86 2.7 -100
F=FMSY fractile 10 4278 0.51 1.76 -2.9 68
F=FMSY fractile 20 5333 0.64 1.73 -4.3 109
F=FMSY fractile 35 6716 0.81 1.7 -6.1 163




Symbol Footnotes
^ Biomass 2024 relative to biomass 2023.
^^ Advice value for 2023 relative to the advice value for each of the years 2021 and 2022 (2552tonnes). Note that the previous advice included surviving discards.