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Four-spot megrim (Lepidorhombus boscii) in divisions 8.c and 9.a (southern Bay of Biscay and Atlantic Iberian waters East)
StockCode (Assessment Component)
ldb.27.8c9a
Assessment Year
2026
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
26018
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.30932126
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 EU multiannual plan (MAP) for Western Waters and adjacent waters is applied, catches in 2027 that correspond to the F ranges in the plan are between 2 354 and 4 706 tonnes. According to the MAP, catches higher than those corresponding to FMSY (3 432 tonnes) can only be taken under conditions specified in the MAP, while the entire range is considered precautionary when applying the ICES advice rule. The use of combined species total allowable catch (TAC) for the two megrim species, megrim (Lepidorhombus whiffiagonis) and four-spot megrim (Lepidorhombus boscii), prevents effective control of the single-species exploitation rates and could lead to the overexploitation of either 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
Projected landings
Projected discards
Fages 2–4 total
Fages 2–4 projected landings
Fages 1–2 Projected discards
Spawning-stock biomass (SSB)
% SSB change*
% advice change^^
2027
2027
2027
2027
2027
2027
2028
2028
2027
(t)
(t)
(t)
(ratio)
(ratio)
(ratio)
(t)
(%)
(%)
ICES Basis Advice
EU MAP^: FMSY
3432
3249
183
0.31
0.23
0.035
13562
-22
21.5
F = MAP^ FMSY lower
2354
2227
126
0.2
0.152
0.023
14821
-15.1
19.3
F = MAP^ FMSY upper
4706
4455
251
0.46
0.35
0.052
12098
-31
10.9
Other scenarios
F = 0
0
0
0
0
0
0
17619
0.87
-100
FPA
4706
4455
251
0.46
0.35
0.052
12098
-31
67
SSB (2028) = BPA = MSYBtrigger
13032
12377
655
2.9
2.2
0.33
3608
-79
360
SSB (2028) = Blim
13752
13066
686
3.5
2.6
0.39
2991
-83
390
SSB2028 = SSB2027
127
120
7
0.01
0.007
0.001
17466
0
-95
F = F2026
745
705
40
0.058
0.044
0.007
16726
-4.2
-74
Catch advice 2027 = catch advice 2026
2825
2674
151
0.25
0.187
0.028
14268
-18.3
0
Symbol
Footnotes
*
SSB 2028 relative to SSB 2027.
^
The EU multiannual plan (MAP; EU, 2019).
^^
Advice values for 2027 relative to the corresponding 2026 values (FMSY 2825 tonnes, FMSY lower 1973 tonnes, FMSY upper 4244 tonnes). All other scenarios are relative to the 2026 value for the FMSY scenario (2 825 tonnes).
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