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***
Fishing mortality F2025/FMSY
Stock size B2026/BMSY
% B change*
% Advice change**
2025 2025 2026 2026 2025
(t) (ratio) (ratio) (%) (%)
ICES Basis Advice
MSY approach (15th percentile of predicted catch distribution under F = FMSY) 5307 0.8 1.15 0.59 0.63
Other scenarios
FMSY 6448 1 1.11 -3.2 22
F=F2023 2932 0.42 1.24 8.2 -44
F=0 0 0 1.34 17.3 -100
F = FMSY fractile 10 5067 0.76 1.16 1.38 -3.9
F = FMSY fractile 20 5506 0.83 1.14 -0.061 4.4
F = FMSY fractile 35 6000 0.92 1.12 -1.7 13.8




Symbol Footnotes
* Percentage change of B2026/BMSY relative to B2025/BMSY.
** Advice value for 2025 relative to the advice value for 2024 (5274 tonnes).
*** ICES cannot quantify how any increase in catches may impact discard rates for this stock.