Advice and Scenarios Database



Norway lobster (Nephrops norvegicus) in Division 4.a, Functional Unit 9 (central North Sea, Moray Firth)
StockCode
nep.fu.9
Assessment Year
2020
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13971
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5843






Catch scenarios


Basis
Total catch PL + PDD + PSD
Dead removals PL + PDD
Projected landings PL
Projected dead discards PDD
Projected surviving discards PSD
% Harvest rate* for PL + PDD
% advice change**
2021 2021 2021 2021 2021 2021 2021
(t) (t) (t) (t) (t) (%) (%)
ICES Basis Advice
MAP ^: FMSY 1180 1178 1172 6 2 11.8 -9.7
F = MAP ^ FMSY lower 911 909 904 5 2 9.1 -9.7
F=MAP ^ FMSY upper *** 1180 1178 1172 6 2 11.8 -9.7
Other scenarios
MSY approach 1180 1178 1172 6 2 11.8 -9.7
F0.1 780 779 775 4 1 7.8 -40
F2017–2019 1230 1228 1222 6 2 12.3 -5.9
F2019 1481 1478 1470 8 3 14.8 13.3
Fmax 1491 1488 1480 8 3 14.9 14.1




Symbol Footnotes
* Calculated for dead removals.
** Total catch 2021 is relative to the advice value 2020 (1307 tonnes). Advice basis values for 2021 are relative to the 2020 advice values (MAP advice of 1307, 1008, and 1307 tonnes, respectively); other option values are relative to FMSY.
*** FMSY upper = FMSY for this stock.
^ EU multiannual plan (EU MAP) for the North Sea (EU, 2018).