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Norway lobster (Nephrops norvegicus) in Division 6.a, Functional Unit 13 (West of Scotland, the Firth of Clyde and Sound of Jura)
StockCode
nep.fu.13
Assessment Year
2020
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
13990
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.5864
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 EU multiannual plan (MAP) for Western Waters and adjacent waters is applied, catches in 2021 that correspond to the F ranges in the MAP are between 3638 tonnes and 5425 tonnes (3142–4791 tonnes for the Firth of Clyde and 496–634 tonnes for the Sound of Jura), assuming recent discard rates. The entire range is considered precautionary when applying the ICES advice rule. To ensure that Nephrops stocks are exploited sustainably, management of Nephrops should be implemented at the functional unit level. In this particular functional unit (FU), additional measures should be implemented to ensure that landings taken in each subarea (the Firth of Clyde and the Sound of Jura) are in line with the advice. Note: This advice sheet is abbreviated due to the COVID-19 disruption. The previous advice issued for 2020 is attached as Annex 1.
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**
2021
2021
2021
2021
2021
2021
2021
(t)
(t)
(t)
(t)
(t)
(%)
(%)
ICES Basis Advice
EU MAP ^: FMSY
4791
4726
4531
195
65
15.1
-8.3
F= MAP FMSY lower
3142
3099
2971
128
43
9.9
-8.3
F = MAP FMSY upper***
4791
4726
4531
195
65
15.1
-8.3
Other scenarios
MSY approach
4791
4726
4531
195
65
15.1
-8.3
F2019
4505
4444
4261
183
61
14.2
-13.8
Symbol
Footnotes
*
By number.
**
Advice basis values for 2021 relative to the 2020 advice values (MAP advice of 5227, 3428, and 5227 tonnes, respectively); other option values are relative to FMSY.
***
FMSY upper = FMSY for this stock.
^
EU multiannual plan (MAP) for the Western Waters and adjacent waters (EU, 2019).
^^
Represents the amount that would normally be discarded.
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