Advice and Scenarios Database



Thornback ray (Raja clavata) in Subarea 4 and in divisions 3.a and 7.d (North Sea, Skagerrak, Kattegat, and eastern English Channel)
StockCode (Assessment Component)
rjc.27.3a47d
Assessment Year
2023
Stock Category
2
Purpose
Advice
Published
Stock Assessment Key
18342
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.21856875.v1






Catch scenarios


Basis
Total catch (2024)***
Fishing mortality F2024/FMSY
Stock size B2025/BMSY
% B change*
% Advice change**
2024 2024 2025 2025 2024
(t) (ratio) (ratio) (%) (%)
ICES Basis Advice
MSY approach (15th percentile of predicted catch distribution under F = FMSY) 5274 0.8 1.14 0.67 116
Other scenarios
FMSY 6533 1 1.12 -1.36 167
F=F2023 2807 0.42 1.19 4.7 15
F=0 0 0 1.24 9.3 -100
F = FMSY fractile 10 5015 0.76 1.15 1.09 105
F = FMSY fractile 20 5489 0.83 1.14 0.32 124
F = FMSY fractile 35 6032 0.92 1.13 -0.55 147




Symbol Footnotes
* Percentage change of B2025/BMSY relative to B2024/BMSY.
** Advice value for 2024 relative to the landings advice value for 2022 and 2023 (2446 tonnes).
*** ICES cannot quantify how any increase in catches may impact discard rates for this stock.