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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
2022
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
17559
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.19772437.v1
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 2019–2021, catches in 2023 should be no more than 13 679 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 **
2023
2023
2023
2023
2023
2023
2023
(t)
(t)
(t)
(t)
(t)
(%)
(%)
ICES Basis Advice
MSY approach
13679
13655
13583
72
24
7.5
-7.6
Other scenarios
F2019-2021
8390
8375
8331
44
15
4.6
-43
F2021
8530
8515
8470
45
15
4.7
-42
FMSY lower
12037
12016
11953
63
21
6.6
-18.7
FMSY upper***
13679
13655
13583
72
24
7.5
-7.6
F35SpR
20427
20391
20284
107
36
11.2
38
Fmax
29910
29858
29701
157
52
16.4
102
Symbol
Footnotes
*
Calculated for dead removals.
**
Advice basis values for 2023 relative to the 2022 advice value (FMSY catch advice of 14 803 tonnes).
***
FMSY upper= FMSY for this stock.
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