Advice and Scenarios Database



Herring (Clupea harengus) in subdivisions 30 and 31 (Gulf of Bothnia)
StockCode
her.27.3031
Assessment Year
2018
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
9779
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.4383






Catch scenarios


Basis
Catch
Ftotal
SSB
SSB
% SSB change*
% TAC change**
% Advice change***
2019 2019 2019 2020 2020 2020 2020
(t) (ratio) (t) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: FMSY 88703 0.21 414047 394945 -5 5 -7
Other scenarios
F = 0 0 0 427665 499703 17 -100 -100
F = Fpa 96179 0.23 412682 386391 -6 14 1
F = Flim 117632 0.29 408765 361564 -12 39 23
SSB (2020) = Blim 264259 0.84 376633 202272 -46 212 177
SSB (2020) = Bpa 189165 0.52 394597 283180 -28 124 98
SSB (2020) = MSY Btrigger 189165 0.52 394597 283180 -28 124 98
F = F2018 84133 0.198 414846 399991 -4 -1 -12
F = proposed FMSY lower^, ^^^ 65662 0.151 418125 421393 1 22 -31
F = proposed FMSY upper^^, ‡ 88703 0.21 414047 394945 -5 5 -7




Symbol Footnotes
* SSB 2020 relative to SSB 2019.
** Catch in 2019 relative to TAC in 2018 (84 599 tonnes).
*** Advice value 2019 relative to advice value 2018.
‡ Advice value for in 2019 relative to Advice value for the proposed FMSY upper2018 (95566 tonnes), (in % Advice change*** column)
^ Lower FMSY range calculated during the stock benchmark in 2017 (ICES, 2017).
^^ Upper FMSY range calculated during the stock benchmark in 2017 (ICES, 2017).
^^^ Advice value for in 2019 relative to Advice value for the proposed FMSY lower 2018 (70617 tonnes), (in % Advice change*** column)