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
2018
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
10167
Link to Advice Sheet
https://doi.org/10.17895/ices.pub.4564






Catch scenarios


Basis
Catch (1 November 2018–31 October 2019)*
F (1 November 2018–31 October 2019)
5th percentile SSB in the 4th quarter 2019
Median SSB (4th quarter 2019) **
% SSB change **
% Catch change ***
% Advice change ^
2019 2019 2019 2019 2020 2020 2020
(t) (ratio) (t) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: (escapement strategy) 95% probability of SSB being above Blim in the 4th quarter of 2019, with an Fcap (Fbar(1–2)) = 0.7 135459 0.7 44030 119310 -5 366 -36
Other scenarios
MSY approach: (escapement strategy) 95% probability of SSB being above Blim in the 4th quarter of 2019 156798 0.84 39450 112160 -11 439 -26
F=0 0 0 83790 175250 39 -100 -100
F=Fstatus quo 40593 0.181 69560 157000 25 40 -81
Median SSB at Blim in the 4th quarter of 2019 416498 4 8020 39450 -69 1332 96
Median SSB at Bpa in the 4th quarter of 2019 313109 2.3 17170 65000 -48 977 47
F = 0.3 (Fcap of 0.3) 64925 0.3 61540 146150 16 123 -69
F = 0.4 (Fcap of 0.4) 83976 0.4 56160 138890 10 189 -60
F = 0.5 (Fcap of 0.5) 102076 0.5 51590 131760 5 251 -52
F = 0.6 (Fcap of 0.6) 119149 0.6 47570 125010 -1 310 -44
F = 0.7 (Fcap of 0.7) 135459 0.7 44030 119310 -5 366 -36




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 2018–31 October 2019.
** SSB at the beginning of the 4th quarter 2019 relative to SSB at the beginning of the 4th quarter 2018 (= 125 940 t).
*** Catches 1 October 2018–30 September 2019 relative to catches 1 October 2017–30 September 2018 (= 29 077 t).
^ Advice value 2019 relative to advice value 2018 (= 212 531 t).