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Norway lobster (Nephrops norvegicus) in Division 4.a, Functional Unit 7 (northern North Sea, Fladen Ground)
StockCode
nep.fu.7
Assessment Year
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
16774
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7809
Status:
valid
Advice Component
Advice Category
*
FMSYranges
MP
MSY
NoAdv
Other
PA
Advice Type
*
Catches
Effort
FishMort
Landings
NoAd
NoFish
Advice Unit
*
t
ratio
%
AdviceValue
*
Advice Value Lower Range
Advice Value Upper Range
Wanted Catch
Wanted Catch Lower Range
Wanted Catch Upper Range
Advice Sentence
*
ICES advises that when the MSY approach is applied, and assuming that discard rates and fishery selection patterns do not change from the average of the years 2018–2020, catches in 2022 should be no more than 14 803 tonnes. To ensure that the stock in Functional Unit (FU) 7 is exploited sustainably, management should be implemented at the functional unit level. The catch in FU 7 has been lower than advised in recent years, and if the difference is transferred to other FUs, this could result in non-precautionary exploitation of those FUs. ICES notes the existence of a management plan, developed and adopted by one of the relevant management authorities for Subarea 4. ICES considers this plan to be precautionary when implemented at the functional unit level.
Advice Released Date
*
Advice Applicable From
*
Advice Applicable Until
*
TAF Link
Management Alignment
Full
Multiple
Other
Partial
MP WebLink
Management Plan Ownership
Link To Evaluation
Inquiries or Comments?
Email:
Message:
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**
2022
2022
2022
2022
2022
2022
2022
(t)
(t)
(t)
(t)
(t)
(%)
(%)
ICES Basis Advice
MSY approach
14803
14768
14664
104
35
7.5
55
Other scenarios
F2020
7208
7191
7140
51
17
3.7
-25
F2018-2020
7894
7876
7821
55
18
4
-17.6
FMSY lower
13026
12996
12905
91
30
6.6
36
FMSY upper***
14803
14768
14664
104
35
7.5
55
F35SpR
22106
22054
21899
155
52
11.2
131
Fmax
32369
32293
32066
227
76
16.4
240
Symbol
Footnotes
*
Calculated for dead removals.
**
Advice basis values for 2022 relative to the 2021 advice value (MAP FMSY advice of 9579 tonnes).
***
FMSY upper = FMSY for this stock.
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