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Norway lobster (Nephrops norvegicus) in Division 4.b, Functional Unit 8 (central North Sea, Firth of Forth)
StockCode
nep.fu.8
Assessment Year
2022
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
17580
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.19772440.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 3201 tonnes. To ensure that the stock in Functional Unit (FU) 8 is exploited sustainably, management should be implemented at the functional unit level. 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
3201
3148
2988
160
53
16.3
-0.47
Other scenarios
F0.1
1846
1815
1723
92
31
9.4
-43
FMSY lower
2082
2047
1943
104
35
10.6
-35
FMSY upper ***
3201
3148
2988
160
53
16.3
-0.47
F2021
2123
2088
1982
106
35
10.8
-34
F2019-2021
2298
2260
2145
115
38
11.7
-29
F35SpR
2493
2452
2328
124
41
12.7
-22
Symbol
Footnotes
*
Calculated for dead removals.
**
Advice basis values for 2023 relative to the 2022 advice value (FMSY catch advice of 3216 tonnes).
***
FMSY upper= FMSY for this stock.
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