Advice and Scenarios Database



Herring (Clupea harengus) in subareas 1, 2, 5 and divisions 4.a and 14.a, Norwegian spring-spawning herring (the Northeast Atlantic and Arctic Ocean)
StockCode
her.27.1-24a514a
Assessment Year
2017
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
9244
Link to Advice Sheet
NA - The advice link for key 9244 was not found!






Catch scenarios


Basis
Total catch
FW*
SSB
% SSB change**
% Catch change***
2018 2018 2019 2019 2019
(t) (ratio) (t) (%) (%)
ICES Basis Advice
Agreed management plan^ 384197 0.086 3629000 -2 -52
Other scenarios
MSY approach: FMSY × SSB(2018)/MSYBtrigger 489022 0.111 3538000 -4 -39
FMSY 647543 0.15 3399000 -8 -20
F = 0 0 0 3967000 7 -100
Fpa 647543 0.15 3399000 -8 -20
Flim^^
SSB (2019) = Blim 1690033 0.47 2500000 -32 110
SSB (2019) = Bpa = MSYBtrigger ^^^
F = F2017 804951 0.191 3262000 -12 0




Symbol Footnotes
* Fw = Fishing mortality weighted by population numbers (age groups 5–11).
** SSB 2019 relative to SSB 2018.
*** Catch in 2018 relative to estimated catch in 2017 (805 142 t).
^ According to the harvest control rule in the management plan F(2018) = 0.125 × (SSB(2018)-Blim)/(Bpa-Blim) + 0.05 × (Bpa-SSB(2018))/(Bpa-Blim), where Bpa = 5, Blim = 2.5 and SSB(2018) = 3.691, expressed in million t.
^^ Flim is presently undefined for this stock.
^^^ Even with zero catch in 2018 the stock is predicted to be below Bpa and MSY Btrigger in 2019.