SUMMARY

SUMMARY

IDENTIFICATION

SCIENTIFIC NAME(s)

Nephrops norvegicus

SPECIES NAME(s)

Norway lobster, nephrops

COMMON NAMES

Nephrops

Stock structure with ICES are VI is uncertain. Nephrops (or Norway Lobster) stocks area assessed as Functional Units (FU) based on growth parameters and other factors. Within FU 11 there is one distinct population in North Minch (ICES 2016)(ICES 2016).


ANALYSIS

Strengths
  • Stock appears to be in good shape and is above MSY Btrigger
  • Exploitation is below FMSY and has been for the last three years
  • Catch has been below advised levels
  • Measure have been implemented to reduce cod and other bycatch
  • Model provides the ability for short term projections and captures a reasonable sense of uncertainty
  • Harvesters comply with the overall ICES area quotas
Weaknesses
  • Managers set quotas on the larger stock area rather then on the FU as advised
  • Managers have set no objectives for this stock; Blimit/BPA is not defined
  • Trawling can impact the seabed
  • Bycatch, even with mitigation can be high

FISHSOURCE SCORES

Management Quality:

Management Strategy:

< 6

Managers Compliance:

< 6

Fishers Compliance:

≥ 6

Stock Health:

Current
Health:

10

Future Health:

9.2


RECOMMENDATIONS

CATCHERS & REGULATORS

1. Start a fishery improvement project to address sustainability issues in this fishery. For advice on starting a FIP, see SFP’s Seafood Industry Guide to FIPs at http://www.sustainablefish.org/publications/2014/04/30/the-seafood-industry-guide-to-fips.
2. Communicate to fishery managers that there are sustainability issues in this fishery that may be affecting the sale of products, and request that they comprehensively evaluate and address such issues.

RETAILERS & SUPPLY CHAIN

1. Encourage your supply chain to start a fishery improvement project. For advice on starting a FIP see SFP’s Seafood Industry Guide to FIPs at http://www.sustainablefish.org/publications/2014/04/30/the-seafood-industry-guide-to-fips.
2. Work with other suppliers and buyers on a pre-competitive basis to start a supply chain roundtable to review improvement needs in this and other similar fisheries, catalyze fishery improvement projects, and monitor progress in improvement efforts.


FIPS

  • United Kingdom Norway lobster - pot/trap & trawl:

    Stage 2

CERTIFICATIONS

  • Stornoway nephrops trawl:

    Withdrawn

Fisheries

Within FishSource, the term "fishery" is used to indicate each unique combination of a flag country with a fishing gear, operating within a particular management unit, upon a resource. That resource may have a known biological stock structure and/or may be assessed at another level for practical or jurisdictional reasons. A fishery is the finest scale of resolution captured in FishSource profiles, as it is generally the scale at which sustainability can most fairly and practically be evaluated.

ASSESSMENT UNIT MANAGEMENT UNIT FLAG COUNTRY FISHING GEAR
North Minch European Union, Division 6a United Kingdom Pots
Single boat bottom otter trawls
Twin bottom otter trawls

Analysis

OVERVIEW

Strengths
  • Stock appears to be in good shape and is above MSY Btrigger
  • Exploitation is below FMSY and has been for the last three years
  • Catch has been below advised levels
  • Measure have been implemented to reduce cod and other bycatch
  • Model provides the ability for short term projections and captures a reasonable sense of uncertainty
  • Harvesters comply with the overall ICES area quotas
Weaknesses
  • Managers set quotas on the larger stock area rather then on the FU as advised
  • Managers have set no objectives for this stock; Blimit/BPA is not defined
  • Trawling can impact the seabed
  • Bycatch, even with mitigation can be high
RECOMMENDATIONS

Last updated on 28 July 2016

Improvement Recommendations to Catchers & Regulators

1. Start a fishery improvement project to address sustainability issues in this fishery. For advice on starting a FIP, see SFP’s Seafood Industry Guide to FIPs at http://www.sustainablefish.org/publications/2014/04/30/the-seafood-industry-guide-to-fips.
2. Communicate to fishery managers that there are sustainability issues in this fishery that may be affecting the sale of products, and request that they comprehensively evaluate and address such issues.

Recommendations to Retailers & Supply Chain

1. Encourage your supply chain to start a fishery improvement project. For advice on starting a FIP see SFP’s Seafood Industry Guide to FIPs at http://www.sustainablefish.org/publications/2014/04/30/the-seafood-industry-guide-to-fips.
2. Work with other suppliers and buyers on a pre-competitive basis to start a supply chain roundtable to review improvement needs in this and other similar fisheries, catalyze fishery improvement projects, and monitor progress in improvement efforts.

1.STOCK STATUS

STOCK ASSESSMENT

Last updated on 3 September 2017

The current assessment utilizes an underwater TV survey as well as incorporates estimated biological fishery parameters (Natural mortality, Selectivity, catchability, etc.) to simulate the stock under various conditions (ICES 2016)(ICES 2016). This approach provides short term projections as well as captures some of the modeling uncertainty. This stock has not been benchmarked since 2013, but has been regularly updated since then.

SCIENTIFIC ADVICE

Last updated on 3 September 2017

There is no management plan in place for this stock. Scientific advice is based on an age-structured simulation using the underwater TV survey extrapolated to habitat. Advised catches are based on estimates of FMSY applied to the current abundance of this stock. To apply this method, the assumption that selectivity as well as discarding are consistent with the previous years (ICES 2016)(ICES 2016)

 ICES advises that management should be at a smaller scale than the ICES Division level. Management at the Functional Unit level could provide the controls to ensure that catch opportunities and effort are at the same scale as the resource (ICES 2016)(ICES 2016).

Reference Points

Last updated on 03 Sep 2017

There is no management plan for this stock as such there is not a Blimt or other management reference points in place. Reference points are analytically derived using Yield per Recruit (YPR) or Spawning Potential Ratios (SPR). To arrive at a MSY Btrigger, the lowest abundance point of that the stock has recovered from is used. FMSY for this stock is a proxy, based  on F35%SPR  and is expressed as an exploitation rate (ICES 2016)(ICES 2016). To arrive at an advised removal, this FMSY is applied to the current stocks abundance as estimated in the assessment (ICES 2016)(ICES 2016).

Current reference points are

MSY Btrigger = 540 million individuals

FMSY = 10.8% harvest rate

CURRENT STATUS

Last updated on 3 September 2017

Overall stock status appears to be in good shape. Abundance is higher than MSY Btrigger (ICES 2016)(ICES 2016). F (as exploitation) has been variable around FMSY since 2007 but is currently below that number (ICES 2016)(ICES 2016).

Trends

Last updated on 03 Sep 2017

Catches have been viable but stable at ~3,000 t since 2005, but recently appear to be dropping from a recent high in 2012. Abundance has also been stable, but variable since 2009. F has been highly variable but in decline as catch has decline (ICES 2016)(ICES 2016).

2.MANAGEMENT QUALITY

MANAGEMENT

Last updated on 3 September 2017

There are no management objectives or plan for this stock. Blimit/BPA is not set. Managers set quotas for the larger ICES area rather than on the FU level, in contradiction to what has been scientifically advised (ICES 2016)(ICES 2016).

Recovery Plans

Last updated on 03 Sep 2017

Not Applicable

COMPLIANCE

Last updated on 3 September 2017

Harvesters generally comply with regulations, and illegal fishing is not thought to be problematic (Andrews, JW et al. 2009)(ICES 2016)(ICES 2016). Compliance with the overall ICES area quota has been strong. Harvest has been lower than advised.

3.ENVIRONMENT AND BIODIVERSITY

BYCATCH
ETP Species

Last updated on 3 September 2017

There is no specific information on the impact of this fishery to Protected, Endangered and Threatened species. But interactions with Spurdog and other elasmobranchs is thought to be problematic in Nephrops trawl fisheries in general (Andrews, JW et al. 2009)(Graham and Ferro, International Council for the Exploration of the Sea et al. 2004)(Leocadio, A et al. 2012)(Williams, C and Carpenter, G 2016)

Other Species

Last updated on 3 September 2017

There are bycatch of other species in Nephrops fisheries in the North Minch. Estimates of discards of whiting, haddock, and Norway Pout can be high  in this area (Andrews, JW et al. 2009)(Graham and Ferro, International Council for the Exploration of the Sea et al. 2004)(Leocadio, A et al. 2012)(Williams, C and Carpenter, G 2016). Bycatches of cod are generally low in Division VIa in the Nephrops fisheries, and a scheme involving square-meshed panels and real-time closures has been introduced to reduce them further. The development of a Conservation Credits Scheme in Scotland requires all trawlers to implement more selective gears in 2009, including the use of 110 mm square mesh panels in 80 mm gear (ICES 2009). 

The minimum landing size for Nephrops is 20 mm carapace length (CL). Discarding rates of Nephrops in the North Minch were low in 2015 at 11% by number (ICES 2016)(ICES 2016). Trawlers are subjected to the discard ban and all bycatch is therefore reported against quotas in 2016.

HABITAT

Last updated on 3 September 2017

Nephrops are limited to a muddy habitat and the distribution of suitable sediment defines the species distribution. The high mud content and soft nature of Nephrops grounds means that trawling readily marks the seabed, trawl marks remaining visible for some time. Burrowing fauna can be seen re-emerging from freshly trawled grounds, implying that there is some resilience to trawling (ICES, 2011). But overall trawling can have a dramatic effect on the seabed (Andrews, JW et al. 2009)(Hiddink et al., others 2017)

A ban on the use of multi-trawl gears (3 or more trawls) for all Scottish boats was introduced from April 2008, limiting the expansion of effective effort (ICES 2009). However, creel fishing is not affected by this legislation. 

Marine Reserves

Last updated on 03 Sep 2017

There are numerous MPAs and SAC as well as other closures in the area (Scottish Government 2014)

FishSource Scores

Last updated on 3 September 2017

MANAGEMENT QUALITY

As calculated for 2016 data.

The score is < 6.

There are no management objectives for this stock

As calculated for 2016 data.

The score is < 6.

Despite advice to the contrary, managers set quotas on larger area than this stock unit operates.

As calculated for 2016 data.

The score is ≥ 6.

Harvest has not exceeded advice since 2012,. Compliance with total ICES area quota is good. Compliance with other measures has not been deemed a problem for this fishery.

STOCK HEALTH:

As calculated for 2016 data.

The score is 10.0.

This measures the Abundance as a percentage of the MSY Btrigger.

The Abundance is 1440000 ('000 individuals). The MSY Btrigger is 540000 ('000 t) .

The underlying Abundance/MSY Btrigger for this index is 267%.

As calculated for 2015 data.

The score is 9.2.

This measures the Harvest rate U as a percentage of the Target harvest rate U.

The Harvest rate U is 7.60 . The Target harvest rate U is 10.8 .

The underlying Harvest rate U/Target harvest rate U for this index is 70.4%.

To see data for biomass, please view this site on a desktop.
To see data for catch and tac, please view this site on a desktop.
To see data for fishing mortality, please view this site on a desktop.
No data available for recruitment
No data available for recruitment
To see data for management quality, please view this site on a desktop.
To see data for stock status, please view this site on a desktop.
DATA NOTES
  • Management reference points are not set for this stock. Instead MSY Btrigger is the lowest observed abundance that the stock recovered from. Blimit is not set for this stock
  • Fishing mortality is expressed as harvest rate (U)
  • FMSY is based on F35%SPR 
  • Quotas are not based on the FU level. Instead an overall quota is set for the ICES area which incorporates other FUs
  • Because of a lack of a management plan, resulting reference points, and the fact that there is no TAC for FU 11, Scores 1-3 were based on qualitative scoring

Download Source Data

Registered users can download the original data file for calculating the scores after logging in. If you wish, you can Register now.

Fishery Improvement Projects (FIPs)

SELECT FIP

Access FIP Public Report

Evaluation Start Date: 17 Jun 2019
Type: Comprehensive

Comments:

FIP transitioned from prospective to active. FIP now at stage 2.

1.
FIP Development
May 19
2.
FIP Launch
Apr 19
Jun 19
3.
FIP Implementation
FIP activities undertaken
4.
Improvements in Fishing Practices and Fishery Management
Verifiable improvement in policy/management and fishing practices
5.
Improvements on the Water
Verifiable improvement on the water
6.
MSC certification (optional)
MSC certificate made public

Certifications

Marine Stewardship Council (MSC)

SELECT MSC

NAME

Stornoway nephrops trawl

STATUS

Withdrawn on 29 March 2012

SCORES

Certification Type:

Sources

Credits

Andrews, J.W. and C.J. Chapman, 2010. Surveillance Report. Stornoway Nephrops Trawl Fishery. Certificate No.: MML-F-035. Moody Marine Ltd. http://www.msc.org/track-a-fishery/certified/north-east-atlantic/stornoway-nephrops-trawl/assessment-downloads-1/18.06.2010-stornoway-nephrops-surveillance-report.pdf

Andrews, J.W., C.J. Chapman and S.J. Lockwood, 2009. Public Certification Report for Stornoway Nephrops Trawl Fishery. Moody Marine Ltd.http://www.msc.org/track-a-fishery/certified/north-east-atlantic/stornoway-nephrops-trawl/assessment-downloads-1/10-03-2009-Stornoway-Nephrops-Public-Certification.pdf

ICES, 2010. ICES Advisory Committee. Book 5: The Celtic Sea and West of Scotland. 5.4.33: Nephrops in Division VIa.http://www.ices.dk/committe/acom/comwork/report/2010/2010/Neph-via.pdf

ICES, 2012. Report of the ICES Advisory Committee, 2012. Book 5: The Celtic Sea and West of Scotland. 5.4.33: Nephrops in Division VIa.http://www.ices.dk/committe/acom/comwork/report/2012/2012/Neph-Via.pdf

ICES. 2009. 5.4.33 Nephrops in Division VIa. ICES Advice 2009, Book 5 http://www.ices.dk/committe/acom/comwork/report/2009/2009/Nep-Via.pdf

ICES, 2011. Report of the ICES Advisory Committee, Book 5: The Celtic Sea 5.4.33 Ecoregion: Celtic Sea. Stock: Nephrops in Division VIa. Advice summary for 2012, 30 pp. http://www.ices.dk/committe/acom/comwork/report/2011/2011/Neph-Via.pdf

References

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    Norway lobster - North Minch, European Union, Division 6a, United Kingdom, Single boat bottom otter trawls

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