Advice and Scenarios Database



Norway pout (Trisopterus esmarkii) in Subarea 4 and Division 3.a (North Sea, Skagerrak and Kattegat)
StockCode
nop.27.3a4
Assessment Year
2019
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13166
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.4869






Catch scenarios


Basis
Catch (1 November 2019–31 October 2020)*
F (1 November 2019–31 October 2020)
5th percentile SSB in the 4th quarter 2020
Median SSB (4th quarter 2020)
% SSB change **
% Catch change ***
% Advice change ^
2020 2020 2020 2020 2021 2021 2021
(t) (ratio) (t) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: (escapement strategy) 95% probability of SSB being above Blim in the 4th quarter of 2020. with an Fcap (Fbar(1–2)) = 0.7 167105 0.7 43610 139130 47 126 23
Other scenarios
MSY approach: (escapement strategy) 95% probability of SSB being above Blim in the 4th quarter of 2020 185404 0.81 39450 131130 39 151 37
F=0 0 0 97580 228020 141 -100 -100
F=Fstatus quo 91256 0.35 63730 176070 86 23 -33
Median SSB at Blim in the 4th quarter of 2020 458215 3.58 6370 39450 -58 520 238
Median SSB at Bpa in the 4th quarter of 2020 367440 2.27 13470 65000 -31 397 171
F = 0.3 (Fcap of 0.3) 80969 0.3 67000 181770 93 10 -40
F = 0.4 (Fcap of 0.4) 104365 0.4 59830 168840 79 41 -23
F = 0.5 (Fcap of 0.5) 126496 0.5 53330 158050 67 71 -7
F = 0.6 (Fcap of 0.6) 147592 0.6 48220 148350 57 100 9
F = 0.7 (Fcap of 0.7) 167105 0.7 43610 139130 47 126 23




Symbol Footnotes
* The catch forecast is for the period 1 October to 30 September. ICES considers that this forecast can be used directly for manangement purposes for the period 1 November 2019 to 31 October 2020.
** SSB at the beginning of the 4th quarter of 2020 relative to SSB at the beginning of the 4th quarter of 2019 (= 94 420 t).
*** Catches 1 October 2019–30 September 2020 relative to catches 1 October 2018–30 September 2019 (= 73 905 t).
^ Advice value 2020 relative to the advice value 2019 (= 135 459 t).