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View Advice
Herring (Clupea harengus) in subdivisions 30 and 31 (Gulf of Bothnia)
StockCode
her.27.3031
Assessment Year
2024
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
19122
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.25019282
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 the Baltic Sea is applied, catches in 2025 that correspond to the F ranges in the plan are between 66 446 (corresponding to Flower × SSB2025/MSY Btrigger) tonnes and 74 515 tonnes (corresponding to FMSY × SSB2025/MSY Btrigger).
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 (2025)
F (2025)
SSB (2026)
% SSB change*
% TAC change**
% advice change***
Probability SSB <; Blim in 2026 (%)^
2025
2025
2026
2026
2025
2025
2026
(t)
(ratio)
(t)
(%)
(%)
(%)
(%)
ICES Basis Advice
EU MAP^^: FMSY × SSB(2025)/MSY Btrigger
74515
0.19
532003
-0.3
36
18
4.8
EU MAP^^: MAP range Flower × SSB(2025)/MSYBtrigger
66446
0.168
539660
1.2
21
36
4.1
Other scenarios
F = 0
0
0
602872
13
-100
-100
1
FMSY
84586
0.218
522454
-2.1
54
34
6.1
Flower
75605
0.193
530970
-0.5
38
20
4.9
Fpa = FMSY upper
84586
0.218
522454
-2.1
54
34
6.1
Fupper x SSB (2025)/MSYBtrigger
74515
0.19
532003
-0.3
36
18
4.8
SSB (2026)=Blim
225320
0.69
389921
-27
310
257
50
SSB (2026)= Bpa
90593
0.235
516760
-3.1
65
44
6.9
SSB (2026)= MSYBtrigger##
SSB (2026)= SSB (2025)
73058
0.186
533385
0
33
16
4.7
F=F2024
56654
0.142
548957
2.9
3
-10
3.4
P(SSB (2026) <; Blim) = 5 %
75605
0.193
530970
-0.5
38
20
5
Symbol
Footnotes
*
SSB 2026 relative to SSB 2025.
**
Catch in 2025 relative to the TAC in 2024 (55 000 tonnes).
***
Advice values for 2025 relative to the corresponding 2024 values (EU MAP advice of 63 049 [FMSY] and 48 824 [Flower] tonnes, respectively; other values are relative to 63 049 tonnes).
#
Based on stochastic forecasts, using the F with three decimals to get close to the biomass target.
##
The MSYBtrigger option was left blank because MSYBtrigger cannot be achieved in 2026, even with zero catch in 2025.
^
The probability of SSB being below Blim in 2026. This probability relates to the short-term probability of SSB <; Blim and is not comparable to the long-term probability of SSB <; Blim tested in simulations when estimating fishing mortality reference points.
^^
MAP multiannual plan (EU, 2016, 2019, 2020).
~
Advice values for 2025 relative to the 2024 value corresponding to FMSY upper.