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Thornback ray (Raja clavata) in divisions 8.a-b and 8.d (Bay of Biscay)
StockCode (Assessment Component)
rjc.27.8abd
Assessment Year
2026
Stock Category
2.11
Purpose
Advice
Published
Stock Assessment Key
25854
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.30932327
Status:
Valid
Advice Component
Advice Category
*
FMSYranges
MP
MSY
NoAdv
Other
PA
Advice Type
*
Catches
Effort
FishMort
Landings
NoAd
NoFish
Advice Unit
*
t
ratio
%
AdviceValue
*
Advice Value Lower Range
Advice Value Upper Range
Wanted Catch
Wanted Catch Lower Range
Wanted Catch Upper Range
Advice Sentence
*
ICES advises that when the maximum sustainable yield (MSY) approach is applied, catches in 2027 and 2028 should be no more than 282 tonnes and 285 tonnes respectively. All catches are assumed to be landed. Management of the catches of skates and rays under a combined total allowable catch (TAC) prevents effective control of single-stock exploitation rates and could lead to overexploitation of some species.
Advice Released Date
*
Advice Applicable From
*
Advice Applicable Until
*
TAF Link
Management Alignment
Full
Multiple
Other
Partial
MP WebLink
Management Plan Ownership
Link To Evaluation
Inquiries or Comments?
Email:
Message:
Catch scenarios
Basis
Total catch
Fishing mortality F/FMSY
Stock size B/BMSY
% Biomass change **
% Advice change ***
Probability of B below Blim
2027
2027
2028
2028
2027
2028
(t)
(ratio)
(ratio)
(%)
(%)
(%)
ICES Basis Advice
Maximum sustainable yield (MSY) approach (15th percentile of predicted catch distribution under F = FMSY)
282
0.52
0.93
4.3
-9.4
0.01
Other scenarios
F = FMSY
539
1
0.9
0.53
73
0.01
F = F2026
529
0.98
0.9
0.7
70
0.01
F = 0
0
0
0.97
8.3
-100
0.01
Catch = 35th percentile of predicted catch distribution under F=FMSY
431
0.8
0.92
2.19
38
0.01
Symbol
Footnotes
*
The figures in the table are rounded. Calculations were done with unrounded inputs, and computed values may not match exactly when calculated using the rounded figures in the table.
**
Biomass 2028 relative to biomass 2027 at the beginning of the year (0.90).
***
Advice value for 2027 relative to catch advice value for 2026 (311 tonnes).
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