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
2019
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13087






Catch scenarios


Basis
Total catch
FW*
SSB
% SSB change**
% Catch change***
% Advice change****
2020 2020 2021 2021 2021 2021
(t) (ratio) (t) (%) (%) (%)
ICES Basis Advice
Agreed management strategy ^ 525594 0.14 3660436 0 -32 -11
Other scenarios
MSY approach: FMSY 584722 0.157 3610543 -1 -24 -1
F = 0 0 0 4105988 12 -100 -100
Fpa 818335 0.227 3413922 -7 6 39
Flim 1018785 0.291 3245902 -11 32 73
SSB (2021) = Blim 1920272 0.638 2500000 -32 148 226
SSB (2021) = Bpa = MSYBtrigger 1092679 0.316 3184000 -13 41 86
F = F2019 683925 0.186 3526947 -3 -12 16




Symbol Footnotes
* Fw = Fishing mortality weighted by population numbers (ages 5–12+).
** SSB 2021 relative to SSB 2020.
*** Catch in 2020 relative to estimated catch in 2019 (773 750 t).
**** Advice value 2020 relative to advice value 2019 (588 562 t).
^ According to the harvest control rule in the management strategy F(2019) = Fmgt = 0.14, since the SSB is forecast to be above Btrigger on 1 January 2020.