Advice and Scenarios Database



Norway lobster (Nephrops norvegicus) in divisions 7.f and 7.g, Functional Unit 22 (Celtic Sea, Bristol Channel)
StockCode
nep.fu.22
Assessment Year
2020
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13911
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5836






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
MSY approach; F = EU MAP ^: FMSY × Stock abundance 2021 / MSY Btrigger 1560 1512 1371 141 47 9.7 -45
MAP FMSY lower × Stock abundance 2021 / MSY Btrigger 1238 1201 1088 112 37 7.7 -45
Other scenarios
MAP FMSYupper × Stock abundance 2021 / MSYBtrigger 1560 1512 1371 141 47 9.7 -45
F = MAP FMSY 2058 1996 1809 187 62 12.8 -27
F = MAP FMSY lower 1640 1591 1442 149 50 10.2 -42
F = MAP FMSY upper*** 2058 1996 1809 187 62 12.8 -27
F2019 1366 1325 1201 124 41 8.5 -52




Symbol Footnotes
* By number.
** Advice value for 2021 relative to the corresponding 2020 values (MAP advice value of 2820, 2247, and 2820 tonnes, respectively; other values are relative to FMSY).
*** FMSY upper = FMSY for this stock.
^ EU multiannual plan (MAP) for Western Waters (EU, 2019).
^^ Represents the amount that would normally be discarded.