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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
2021
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
16775
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.7810
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 3216 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 **
2022
2022
2022
2022
2022
2022
2022
(t)
(t)
(t)
(t)
(t)
(%)
(%)
ICES Basis Advice
MSY approach
3216
3154
2967
187
62
16.3
-18.2
Other scenarios
F2020
1195
1172
1103
69
23
6.1
-70
F0.1
1855
1819
1711
108
36
9.4
-53
FMSY lower
2091
2051
1930
121
40
10.6
-47
F2018-2020
2446
2399
2257
142
47
12.4
-38
F35SpR
2505
2457
2312
145
48
12.7
-36
FMSY upper ***
3216
3154
2967
187
62
16.3
-18.2
Symbol
Footnotes
*
Calculated for dead removals.
**
Advice basis values for 2022 relative to the 2021 advice value (MAP FMSY advice of 3931 tonnes).
***
FMSY upper = FMSY for this stock.
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