Advice and Scenarios Database



Thornback ray (Raja clavata) in divisions 8.a-b and 8.d (Bay of Biscay)
StockCode (Assessment Component)
rjc.27.8abd
Assessment Year
2022
Stock Category
2
Purpose
Advice
Published
Stock Assessment Key
17430
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.21261261.v1






Catch scenarios


Basis
Landings
Fishing mortality F2023/FMSY
Stock size B2024/MSY Btrigger^
% biomass change^^
% catch change^^^
2023 2023 2024 2024 2023
(t) (ratio) (ratio) (%) (%)
ICES Basis Advice
MSY approach (35th percentile of predicted catch distribution under F = FMSY) 255 0.82 1.95 1.39 -16
Other scenarios
F = FMSY 312 1 1.92 -0.28 2.4
F = F2021 = Fsq 317 1.01 1.92 -0.4 3.8
Catch = 20th percentile of predicted catch distribution under F=FMSY 192 0.62 1.99 3.3 -37
Catch = 10th percentile of predicted catch distribution under F=FMSY 142 0.46 2 4.7 -53
F = 0 0 0 2.1 9.1 -100




Symbol Footnotes
^ Biomass is at 1 January
^^ Biomass 2024 relative to biomass 2023.
^^^ Advice value relative to ICES estimated catch in 2021 (305 tonnes), as the previous advice was for the stock unit rjc.27.8.