Advice and Scenarios Database



Herring (Clupea harengus) in divisions 6.a and 7.b-c (West of Scotland, West of Ireland)
StockCode (Assessment Component)
her.27.6a7bc
Assessment Year
2017
Stock Category
1.2
Purpose
Advice
Published
Stock Assessment Key
8286
Link to Advice Sheet
Figshare Api request failed!






Catch scenarios


Basis
Total catch
Ftotal
SSB *
% SSB change **
% TAC change ***
2018 2018 2018 2019 2019
(t) (ratio) (t) (%) (%)
ICES Basis Advice
MSY approach^^ : zero catch 0 0 134158 0.0137 -1
Other scenarios
2017 Monitoring TAC 5800 0.042 131063 -0.0097 0
Advice for scientific monitoring (ICES 2016) 4840 0.035 131577 -0.0058 -0.17
FMSY 21050 0.16 122785 -0.072 2.63
F=0.05^^^ 6869 0.05 130489 -0.014 0.18
Fpa 23498 0.18 121437 -0.083 3.05
Flim 37400 0.3 113670 -0.14 5.45
SSB (2019) = Blim^
SSB(2019) = Bpa = MSY Btrigger^
F = F2017 5681 0.041 131126 -0.0092 -0.021




Symbol Footnotes
* For this autumn-spawning stock, the SSB is determined at spawning time and is influenced by fisheries between 1st January and spawning (September).
** SSB 2018 relative to SSB 2017.
*** Catch 2018 relative to agreed scientific monitoring TAC of 5800 t (EC, 2016/0203).
^ The Blim, Bpa and MSY Btrigger options were left blank because Blim cannot be achieved in 2018 even with zero catch advice.
^^ There is no catch option for 2018 that is consistent with the combined stocks recovering to above Blim.
^^^ Fishing mortality corresponding to low impact on stock status.