Advice and Scenarios Database



Undulate ray (Raja undulata) in divisions 7.d and 7.e (English Channel)
StockCode
rju.27.7de
Assessment Year
2024
Stock Category
2
Purpose
Advice
Published
Stock Assessment Key
19173






Catch scenarios


Basis
Total catch
Fishing mortality F2026/FMSY
Stock size B2027/BMSY *
% B change **
% advice change***
corresponding landings
2025 2025 2026 2026 2026 2025
(t) (ratio) (ratio) (%) (%) (t)
ICES Basis Advice
Maximum sustainable yield (MSY) approach (15th percentile of predicted landings distribution under F = FMSY) 4821 0.59 1.77 -4.2 3.1 3784
Other scenarios
FMSY 8029 1 1.69 -8.5 72 6301
F=F2024 1218 0.145 1.86 0.69 -74 956
F=0 0 0 1.89 2.3 -100 0
Landings = 10th percentile of predicted landings distribution under F=FMSY 4279 0.52 1.78 -3.4 -8.5 3358
Landings = 20th percentile of predicted landings distribution under F=FMSY 5279 0.65 1.76 -4.8 13.4 4160
Landings = 35th percentile of predicted landings distribution under F=FMSY 6279 0.82 1.72 -6.6 42 5206




Symbol Footnotes
* Percentage change of B2026/BMSY relative to B2025/BMSY. Biomass is at 01 January
** Advice value for 2025 relative to the advice value for 2024 (4675tonnes).
*** Based on the proportion of total catch that was landed in 2023 (0.785)