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Norway lobster (Nephrops norvegicus) in Division 4.a, Functional Unit 9 (central North Sea, Moray Firth)
StockCode
nep.fu.9
Assessment Year
2023
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
18357
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.21975197.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 2020–2022, catches in 2024 should be no more than 1770 tonnes. To ensure that the stock in Functional Unit (FU) 9 is exploited sustainably, management should be implemented at the functional unit level. A transfer of adviced catch from other FUs to FU 9 could lead to overexploitation. 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**
2024
2024
2024
2024
2024
2024
2024
(t)
(t)
(t)
(t)
(t)
(%)
(%)
ICES Basis Advice
MSY approach: FMSY
1770
1766
1753
13
4
11.8
42
Other scenarios
F0.1
1170
1167
1159
8
3
7.8
-6.3
F = F2020–2022^
1185
1182
1174
8
3
7.9
-5.1
FMSY lower
1365
1362
1352
10
3
9.1
9.3
F = F2022
1501
1497
1486
11
4
10
20
FMSY upper ***
1770
1766
1753
13
4
11.8
42
Fmax
2235
2230
2214
16
5
14.9
79
Symbol
Footnotes
*
Calculated for dead removals.
**
Advice basis values for 2024 are relative to the 2023 advice value (FMSY catch advice of 1249 tonnes).
***
FMSY upper = FMSY for this stock.
^
The harvest rate in 2020 was calculated using an interpolated value for abundance (average of 2019 and 2021).
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