Advice and Scenarios Database



Herring (Clupea harengus) in Subdivision 28.1 (Gulf of Riga)
StockCode (Assessment Component)
her.27.28
Assessment Year
2026
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
22423






Catch scenarios


Basis
Total catch (2027)
F (2027)
Spawning-stock biomass (SSB, 2027)#
SSB (2028)#
% SSB change**
% advice change***
% probability SSB below Blim in 2028 (%)^^^
2027 2027 2027 2028 2028 2027 2028
(t) (ratio) (t) (t) (%) (%) (%)
ICES Basis Advice
EU multiannual plan (MAP)*: FMSY## 33494 0.28 129275 128888 -0.3 8.3 0.1
EU MAP*: MAP range Flower^ 25832 0.21 130889 137201 4.8 7.8 0.001
EU MAP*: MAP range Fupper^^ 38696 0.33 128161 123483 -3.7 8.6 0.4
Other scenarios
F=0 0 0 136136 166027 22 -100 0.001
F=FPA 40709 0.35 127656 121288 -5 31.7 0.4
SSB (2027)=SSB (2028)## 33104 0.28 129367 129368 0 7.1 0.1
SSB (2028)=Blim 110594 1.44 105851 52076 -51 258 50
SSB (2028)=BPA = MSY Btrigger 87916 0.97 114008 72907 -36 184 21
F=F2026 28074 0.23 130438 133997 2.7 -9.2 0.001
p(SSB[2028] belowBlim)=5% 63401 0.61 121714 98030 -19.5 105 4.9




Symbol Footnotes
* MAP (EU, 2016, 2019, 2020, 2023).
** SSB 2028 relative to SSB 2027.
*** Total catch in 2027 relative to ICES advice for 2026 (30913tonnes for the Gulf of Riga herring stock).
# For spring-spawning stocks, SSB is determined at spawning time and is influenced by fisheries between 01 January and spawning (set for May).
## Differences between scenarios are caused by rounding.
^ ICES advice for Flower for 2027 relative to ICES advice for EU MAP range Flower for 2026 (23962 tonnes).
^^ ICES advice for Fupper for 2027 relative to ICES advice for EU MAP range Fupper for 2026 (35643 tonnes).
^^^ The probability of SSB being below Blim in 2028. 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.