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 (Assessment Component)
her.27.1-24a514a
Assessment Year
2018
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
10100
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.4568






Catch scenarios


Basis
Total catch
FW*
SSB
% SSB change**
% Catch change***
% Advice change****
2019 2019 2020 2020 2020 2020
(t) (ratio) (t) (%) (%) (%)
ICES Basis Advice
Agreed management plan^ 588562 0.14 4016687 4 8 53
Other scenarios
MSY approach: FMSY 654642 0.157 3961605 3 20 70
F = 0 0 0 4510098 17 -100 -100
Fpa 915472 0.227 3744886 -3 68 138
Flim 1138954 0.291 3560149 -8 108 196
SSB (2020) = Blim 2449509 0.771 2500000 -36 348 538
SSB (2020) = Bpa = MSYBtrigger 1597787 0.436 3184000 -18 192 316
F = F2018 529333 0.125 4066116 5 -3 38




Symbol Footnotes
* Fw = Fishing mortality weighted by population numbers (ages 5–12+).
** SSB 2020 relative to SSB 2019 (3 859 000 t).
*** Catch in 2019 relative to estimated catch in 2018 (546 448 t).
**** Advice value 2019 relative to advice value 2018 (384 197 t).
^ According to the harvest control rule in the management plan F(2019) = Fmgt = 0.14, since the SSB is forecast to be above Btrigger on 1 January 2019. For 2019, the interannual variation constraints shall not be applied.