Lobster, Norway, Langoustine, Dublin Bay prawn or scampi

Nephrops norvegicus

Method of production — Caught at sea
Capture method — Demersal otter trawl
Capture area — North East Atlantic (FAO 27)
Stock area — Celtic Sea and West of Scotland (Aran, Galway Bay and Slyne Head)
Stock detail — 7b, Functional Unit 17
Picture of Lobster, Norway, Langoustine, Dublin Bay prawn or scampi

Sustainability rating three info

Sustainability overview

Updated: November 2019.

The small Norway lobster is usually caught by trawling, often using nets with small mesh sizes, and therefore bycatch of other species and habitat impacts on the seabed are among the biggest concerns in these fisheries. Where the fishery overlaps with a Marine Protected Area that has been designated to protect seabed features, this concern is increased. In addition, management generally isn’t following scientific advice - with measures being across a wide area, rather than on a stock-by-stock basis, allowing catches are to be above recommended levels in some places.

On the Aran Grounds, the stock is in an overfished state, but fishing is currently within sustainable levels. Management here is not applied at the functional unit level, but catches have generally been below scientific advice. In this area Nephrops are generally caught in by trawls using a smaller mesh size (80mm), and therefore there is a higher risk of bycatch than in other demersal trawl fisheries which use larger mesh sizes. Small whole Nephrops are the main species comprising the discards in this fishery, and the main fish species discarded include anglerfish, skates and rays, as well as haddock, hake, whiting, megrim and dogfish. This whiting stock is below BLim in 2019, but expected to recover somewhat in 2020. There are few stock assessments on skates and rays in these areas but some can be endangered, threatened or protected species. Skates and rays are generally hardy and can survive when they are discarded, but their survival rates largely depend on how they were caught and handled.

You can increase the sustainability of the scampi you eat by choosing Nephrops caught using creels. If sourcing trawl-caught Nephrops, ask for those caught in nets with separator grids and larger meshes (e.g. SELTRA, incline mesh panel), which reduce the risk to bycatch species and discards.

Biology

Norway Lobster (also known as langoustine or scampi) live in burrows on the seabed. They are limited to a muddy habitat and require sediment with a silt and clay content to excavate burrows. Their distribution therefore is determined by the availability of suitable habitat. They occur over a wide area in the North East Atlantic, from Iceland to North Africa and into the Mediterranean, and constitute a valuable fishery for many countries. Males grow relatively quickly to around 6 cm, but seldom exceed 10 years old. Females grow more slowly and can reach 20 years old. Females mature at about 3 years. In the autumn they lay eggs which remain attached to the tail for 9 months (known as being “berried”). During this time the berried females rarely emerge from their burrows and therefore do not commonly appear in trawl catches, although they may be caught using baited creels. This habit of remaining in their burrows has probably afforded their populations some resilience to fishing pressure. Egg hatching occurs in the spring, and females emerge in spring/summer to moult and mate.

Stock information

Criterion score: 0.25 info

Stock Area

Celtic Sea and West of Scotland (Aran, Galway Bay and Slyne Head)

Stock information

This stock is in an overfished state, but is not currently subject to overfishing.

Stock abundance showed an overall decreasing trend from 2002-2012, and has been fluctuating at or below MSY BTrigger (540 million individuals) since then. In 2019 it was at 493 million individuals - a little below MSY Btrigger. The harvest rate has fluctuated significantly across the time-series and in 2018 was 5.4% - below FMSY (8.5%).

ICES advises that when the EU multiannual plan (MAP) for Western Waters and adjacent waters is applied, catches in 2020 that correspond to the F ranges in the MAP are between 696 tonnes and 800 tonnes. The entire range is considered precautionary when applying the ICES advice rule. The upper limit is equivalent to a harvest rate of 7.8% - the recommended rate based on the current stock abundance. It results in a 20% decrease from the 2019 advice.

This stock has been sampled annually using underwater TV (UWTV) since 2002, which is considered to provide high-precision abundance estimates.

Management

Criterion score: 0.5 info

There are multiple management measures and a variety of enforcement employed in the fishery, though the quota is not applied at the functional unit level and therefore, the stock is at risk of overfishing. The stock is currently in an overfished state, but fishing pressure is within sustainable limits. Catches fluctuate, but in general have been below the advice in recent years.

Nephrops stock assessments are conducted by the International Council for the Exploration of the Sea (ICES). Stock assessments are produced for 33 areas across the Northeast Atlantic, called functional units. However, management is applied to a separate 18 areas, called management units. These management units broadly overlap with the functional units, but not very effectively. Vessels are free to move between grounds, allowing effort to develop on some grounds in a largely uncontrolled way and result in overfishing. Therefore, scientists have repeatedly advised over the years that management should be implemented at the functional unit level, to better protect the Nephrops. This should provide the controls to ensure that catch opportunities and effort are compatible and in line with the scale of the resources in each of the stocks: functional unit TAC management is only one way of managing the fisheries and other approaches may also deliver the required safeguards. This advice is not yet being followed, but there have been some discussions among the fishing industry and scientists about developing a long-term plan for the management of the Aran fishery.

This stock is covered by the EU Western Waters Multi Annual management Plan (MAP), covering eighteen FUs, including 11-17 and 19-22. Rather than holding strictly to MSY-based reference points, the MAP includes upper and lower ranges for fishing pressure (F). The ranges for F are set at the Functional Unit level and FU-specific management measures can be introduced if individual Nephrops functional units are found to be below the sustainable abundance levels. However, a single TAC covers the whole of ICES Subarea 7 (FUs 14-17 and 19-22). Catches in Subarea 7 overall have been less than the TAC in recent years, as there has been a general decline in trawling fishing effort for Norway lobster. Landings and discard rates for Functional Unit 17 have been very variable. On average, the total catch over the past 5 years has averaged 97% of the advice, but in 2017 it was 68% and in 2018 it was 117%.

The EU Landings Obligation came into force for Nephrops fisheries in the 80-99 mm trawl fisheries in 2016, meaning that below Minimum Conservation Reference Size (MCRS - 25mm carapace length) individuals, as well as adults that are unwanted (e.g. over-quota) must be landed rather than discarded at sea. As of January 2019, the discard ban applies to all species subject to catch limits. Observations from the 2016-2018 fishery indicate that discarding above the MCRS continues and has changed markedly, likely due to a strong incoming recruitment. Irish discard survival experiments indicate that the trawl discard survival may be up to 64%. Vessels using mesh size over 100mm or highly selective gear have a survivability exemption from the Landings Obligation.

All landings of Nephrops that are over 12kg must be recorded in logbooks. Discards and catches of prohibited and undersized species must be recorded. Surveillance occurs through monitoring of logbooks and sales notes. All vessels over 10m must keep EU logbooks, but vessels under 10m do not have to keep logbooks. There is mandatory Vessel Monitoring System (VMS) for vessels over 12m length, an electronic reporting system and a vessel detection system. Scotland’s surveillance and enforcement agencies include the Navy, Marine Scotland and the Scottish Fisheries Protection Agency who use aerial, at-sea and dock patrols to monitor fishing activities, gear, catches, EU logbook and sales notes. There is observer coverage in the fishery.


In the European Union (EU), EU fishing vessels can fish up to 12 nautical miles of any Member State coast, and closer by agreement. There is overarching fisheries legislation for all Member States, but implementation varies between fisheries, Member States and sea basins.
The EU Common Fisheries Policy (CFP) is the primary overarching policy. Its key environmental objectives are to restore and maintain harvested species at healthy levels (above BMSY), and apply the precautionary and ecosystem-based approaches to fisheries management. To achieve the MSY objective, the MSY exploitation rate is supposed to be achieved by 2020, but this seems unlikely to happen.
The CFP also introduced a Landing Obligation (LO) which bans the discarding at sea of species which are subject to catch limits. Some exemptions apply to species with high post-capture survival, and where avoiding unwanted catches is very difficult. These exemptions are outlined in regional discard plans. Despite quota ‘uplift’ being granted to fleets under the LO, available evidence suggests there has been widespread non-compliance with the policy, and illegal and unreported discarding is likely occurring.
Multi-Annual Plans (MAPs) are a tool for implementing the CFP regionally, with one in place or being developed for each sea basin. They specify fishing mortality targets and ranges for the main targeted species, as well as lower biomass reference points. If populations drop below these points it should trigger a management response. The MAPs also empower Member States to jointly apply measures such as closures, gear or capacity limits, and bycatch limits. There is concern however that the MAPs do not provide adequate safeguards to maintain all stocks at healthy levels.
The EU Technical Measures regulation addresses how, where and when fishing can take place in order to limit unwanted catches and ecosystem impacts. There are common measures that apply to all EU sea basins, and regional measures that vary between sea basins. Measures include Minimum Conservation Reference Sizes (MCRS, previously Minimum Landing Sizes, MLS), gear specifications, mesh sizes, closed areas, and bycatch limits.
The Control Regulation, which is being revised in 2019, addresses application of and compliance with the above, e.g. keeping catches within limits, recording and sharing data, and satellite tracking of vessels over 12 metres (VMS).

Capture Information

Criterion score: 0.5 info

Nephrops live in burrows in the seabed. Therefore, to capture Nephrops, fishing vessels use fishing gear near or on the seabed such as demersal trawls and creels. 100% of Nephrops catches in this fishery are by otter trawls, most of which use 80mm size mesh. Almost all catches are by the Republic of Ireland, with some by the UK.

Demersal otter trawls use small mesh-sized nets (80-99mm) to catch Nephrops than other whitefish trawlers (100mm +) and therefore, it can be an unselective fishing gear, catching and discarding a relatively high amount of undersized Nephrops, various whitefish species and flatfish. Small whole Nephrops are the main species comprising the discards in this fishery, and the main fish species discarded include anglerfish, skates and rays, as well as haddock, hake, whiting, megrim and dogfish. This whiting stock is below BLim in 2019, but expected to recover somewhat in 2020. While other Celtic and Irish Sea Nephrops fisheries overlap areas responsible for significant landings of whiting and severely depleted cod stocks, the Porcupine Bank and Aran grounds areas (ICES areas b, c, j and k) account for much smaller landings of these species.

There are few stock assessments on skates and rays in these areas but some can be endangered, threatened or protected species. Skates and rays are generally hardy and can survive when they are discarded, but their survival rates largely depend on how they were caught and handled. Mortality rates in otter trawls are shown to vary between 10-65%, depending on fishing and handling methods. Vessels which employ codes of conduct on skate and ray handling and/or reduce the risk of their capture, will improve their survival rates, though many of these methods aren’t implemented over whole functional unit or regional levels.

EU Technical Measures regulations require a square mesh panel of 120mm or a sorting grid to reduce bycatch, and bycatches of cod, haddock and saithe should not exceed 20% of the total weight. To further increase selectivity in the fishery, the Irish fishery have focused on increasing the codend mesh size, square mesh and other types of escape panels as well as the use of rigid sorting grids. They are conducting gear trials through a Fishery Improvement Project, but the FIP itself does not apply to this Functional Unit. Until 2018, a cod recovery plan in Irish waters placed additional restrictions on gear, with specific selectivity requirements, but the plan has now come to an end.

Nephrops are mainly found in soft mud habitats, which are also associated other burrowing animals like other crustaceans, bivalves (including the long-lived and slow-growing ocean quahog), and polychaete worms. They are also associated with emergent epifauna such as soft corals and sea pens, which are vulnerable to interactions with bottom-towed fishing gear. Disturbance from trawl gear on the seabed, especially over long periods of time, is likely to affect the structure, species composition, and biodiversity of the burrowed mud community.

There are Marine Protected Areas (MPAs) in this Functional Unit, some of which are designated to protect seabed features from damaging activities. This Nephrops fishery overlaps with parts of these MPAs, but the proportion of the catch coming from these areas is expected to be relatively low in relation to the unit of assessment (i.e. less than 20% of the catch), and so these impacts have not been assessed within the scale of this rating. Given the important role that MPAs have in recovering the health and function of our seas, MCS encourages the supply chain to identify if their specific sources are being caught from within MPAs. If sources are suspected of coming from within designated and managed MPAs, MCS advises businesses to: establish if the fishing activity is operating legally inside a designated and managed MPA; and to request evidence from the fishery or managing authority to demonstrate that the activity is not damaging to protected features or a threat to the conservation objectives of the site(s).

References

EU, 2018. Commission Delegated Regulation (EU) 2018/2034 of 18 October 2018 establishing a discard plan for certain demersal fisheries in North-Western waters for the period 2019-2021. Available at https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv:OJ.L_.2018.327.01.0008.01.ENG [Accessed on 13.11.2019].

EU, 2019. Regulation (EU) 2019/1241 of the European Parliament and of the Council of 20 June 2019 on the conservation of fisheries resources and the protection of marine ecosystems through technical measures. Available at https://eur-lex.europa.eu/legal-content/en/TXT/?uri=CELEX:32019R1241#ntr1-L_2019198EN.01015901-E0001 [Accessed on 13.11.2019].

ICES, 2019. Norway lobster (Nephrops norvegicus) in Division 7.b, Functional Unit 17 (west of Ireland, Aran grounds). In Report of the ICES Advisory Committee, 2019. ICES Advice 2019, nep.fu.17, https://doi.org/10.17895/ices.advice.4794. Available at http://ices.dk/sites/pub/Publication%20Reports/Advice/2019/2019/nep.fu.17.pdf [Accessed on 12.11.2019].

ICES. 2019. Working Group for the Celtic Seas Ecoregion (WGCSE). ICES Scientific Reports. 1:29. 1587 pp. http://doi.org/10.17895/ices.pub.4982. Available at http://www.ices.dk/sites/pub/Publication%20Reports/Expert%20Group%20Report/Fisheries%20Resources%20Steering%20Group/2019/WGCSE/01_WGCSE_2019.pdf [Accessed on 12.11.2019].

Enever R., T.L. Catchpole T.L., Ellis. J.R., Grant A. The survival of skates (Rajidae) caught by demersal trawlers fishing in UK waters. Fisheries Research 97 (2009) 72-76

Mandelman J.W., Cicia, A.M., Ingram Jr, G.W. Driggers III, W.B., Coutreb, K.M. and Sulikowskib, J.A. Short-term post-release mortality of skates (family Rajidae) discarded in a western North Atlantic commercial otter trawl fishery. Fisheries Research 83 (2007) 238-245.

NWWAC. 2017. De minimis proposal for undersized whiting in the TR2 Nephrops trawl fishery (Irish Sea).

Oliver, M., McHugh, M., Browne, D., Murphy, S. Cosgrove, R. 2017. Nephrops survivability in the Irish demersal trawl. Irish Sea Fisheries Board (BIM), Fisheries Conservation Report, September 2017. 12 pp.