Advice and Scenarios Database



Herring (Clupea harengus) in divisions 6.a and 7.b-c (West of Scotland, West of Ireland)
StockCode
her.27.6a7bc
Assessment Year
2017
Stock Category
1.2
Purpose
Advice
Published
Stock Assessment Key
8286
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.3061






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.