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
2020
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13954
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5885






Catch scenarios


Basis
Catch (1 November 2020–31 October 2021)*
F (1 November 2020–31 October 2021)
5th percentile SSB (4th quarter 2021)
Median SSB (4th quarter 2021)
% SSB change **
% catch change ***
% advice change ^
2021 2021 2021 2021 2022 2022 2022
(t) (ratio) (t) (t) (%) (%) (%)
ICES Basis Advice
MSY approach: (escapement strategy) 95% probability of SSB being above Blim in the 4th quarter of 2021. with an Fcap = 0.7 254038 0.7 62190 211550 -8 135 52
Other scenarios
MSY approach: (escapement strategy) 95% probability of SSB being above Blim in the 4th quarter of 2021 349090 1.09 42573 166810 -28 224 109
F = 0 0 0 149050 368180 60 -100 -100
F = Fstatus quo 101451 0.24 108550 299940 30 -6 -39
F = 0.3 125191 0.3 100580 284920 23 16 -25
F = 0.4 160752 0.4 88360 262700 14 49 -4
F = 0.5 193973 0.5 78170 243520 6 80 16
F = 0.6 225116 0.6 69420 226610 -2 109 35
F = 0.7 254038 0.7 62190 211550 -8 135 52




Symbol Footnotes
* The catch forecast is for the period 1 October to 30 September. ICES considers that this forecast can be used directly for management purposes for the period 1 November 2020 to 31 October 2021.
** SSB at the beginning of the 4th quarter of 2021 relative to SSB at the beginning of the 4th quarter of 2020 (= 230 750 tonnes).
*** Catches 1 October 2020–30 September 2021 relative to catches 1 October 2019–30 September 2020 (= 107 875 tonnes).
^ Advice value 2021 relative to the advice value 2020 (= 167 105 tonnes).