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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
ldb.27.8c9a
Assessment Year
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
16698
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7781
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 2022 that correspond to the F ranges in the MAP are between 1283 tonnes and 2724 tonnes. According to the MAP, catches higher than those corresponding to FMSY (1892 tonnes) can only be taken under conditions specified in the MAP, while the entire range is considered precautionary when applying the ICES advice rule. Management of catches of the two megrim species, Lepidorhombus whiffiagonis and L. boscii, under a combined species TAC 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
Ftotal
F projected landings
F projected discards
SSB
% SSB change*
% advice change**
2022
2022
2022
2022
2022
2022
2023
2023
2023
(t)
(t)
(t)
(ratio)
(ratio)
(ratio)
(t)
(%)
(%)
ICES Basis Advice
EU MAP^: FMSY
1892
1704
188
0.193
0.13
0.063
8676
-3
12
F = MAP FMSY lower
1283
1158
125
0.125
0.084
0.041
9372
5
12
F = MAP FMSY upper
2724
2448
276
0.29
0.196
0.095
7726
-14
15
Other scenarios
MSY approach = FMSY
1892
1704
188
0.193
0.13
0.063
8676
-3
12
F = 0
0
0
0
0
0
0
10842
21
-100
Fpa
5448
4896
552
0.58
0.39
0.19
4611
-49
222
SSB (2023) = Blim
6594
5926
668
0.7
0.47
0.23
3300
-63
290
SSB (2023) = Bpa
5458
4905
553
0.58
0.39
0.19
4600
-49
223
SSB2023 = SSB2022
2056
1850
206
0.21
0.14
0.07
8490
-5
22
SSB (2023)= MSYBtrigger
5458
4905
553
0.58
0.39
0.19
4600
-49
223
F = F2021
1313
1185
128
0.128
0.086
0.042
9337
4
-22
Symbol
Footnotes
*
SSB 2023 relative to SSB 2022.
**
Advice values for 2022 relative to the corresponding 2021 values (MAP advice of 1690, 1148, and 2375 tonnes, respectively; other values are relative to FMSY).
^
The EU multiannual plan (MAP; EU, 2019).
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