European lobster

There is no concern for fishing pressure on European lobster around the Isle of Man, but there is concern for biomass. European lobsters have a high resilience to fishing pressure.Route 2 (data limited) scoring has been applied to this rating due to a lack of reference points for biomass and fishing pressure. European lobster has a high resilience to fishing pressure.Landings of European lobster in the Isle of Man have fluctuated between 40 to 60 tonnes since 2010, with 48 tonnes landed in 2024. Fishing effort – measured as pots hauled per year with lobster making up more than 50% of the catch – has risen since 2020, increasing from around 60,000 pots to approximately 110,000 pots in 2024. Despite this rise in effort, landings have remained close to the long-term average of around 50 tonnes, suggesting that there is currently no concern for fishing pressure.There is no fishery-independent biomass assessment for European lobster around the Isle of Man, so there are no biomass reference points to assess stock size. Instead, Landings Per Unit Effort (LPUE) is used as a proxy for stock status. Since 2010, LPUE has ranged between 0.21 and 0.26 kg per pot. A decline was observed between 2017 and 2022, with LPUE falling from 0.26 to 0.21 kg per pot. Although LPUE has recovered slightly to 0.22kg per pot in 2024, it remains low compared to the rest of the timeseries, and with the lack of independent biomass assessment, there remains a concern for biomass.

Management of the stock is partially effective and effort limits are in place, including a vessel pot limit. However, measures are not responsive to stock status and therefore do not adequately control the fishery to prevent overexploitation.To fish commercially for crab and lobster in the Isle of Man (IOM) territorial waters (0-12 nautical miles), vessels are required to be British registered and licensed with an entitlement to catch shellfish and have an IOM Sea Fishing License with a specific license to catch crab and lobster. Since 2016, a moratorium (temporary suspension) on new crab and lobster licences has been in place to prevent overfishing caused by displaced effort from other fisheries. For the 2020/2021 season, there were 49 active licences, and 2 inactive.IOM crab and lobster fisheries are not limited by Total Allowable Catch (TAC) regulations, and therefore are not limited in the number of crabs and lobsters they can take. Instead, the IOM has implemented effort controls through pot limitations:Vessels restricted to maximum 500 pots in territorial waters.Including, no more than 300 pots may be fished within 0-3nm zone.Fishing capacity which has been authorised, but not used, known as latent capacity, is a challenge for managing the fishery. Approximately 6150-7100 pots are allocated to vessels but not actively deployed, representing around 30% of total pot allocation. To address this, a new policy has been introduced to improve the management of latent licences. Commercial crab and lobster licences will now only be issued to applicants who can demonstrate an adequate track record of having fished these species commercially for at least one day between 2016 and 2019.Other conservation methods within this fishery include:A ban on landing berried lobsters, V-notched lobsters, mutilated lobsters, or detached tails and claws.A Minimum Conservation Reference Size (MCRS) of 90mm carapace length.All pots within the 0-3nm zone must be fitted with escape gaps and identification tags.The Marine Conservation Society views Remote Electronic Monitoring (REM) with cameras is one of the most cost-effective tools for providing reliable fisheries data and aiding informed management decisions. Fully monitored fisheries enhance collaboration, data accuracy, stock recovery, and reduce impacts on marine wildlife and habitats. However, the full potential of REM may only be achieved when it tracks fishing location and documents catch and bycatch, particularly where vulnerable species and habitats are at risk. As of January 2024, the EU is introducing a Remote Electronic Monitoring (REM) mandate for EU vessels, including CCTV cameras on vessels 18m or more that pose a potential risk of non-compliance, within the next 4 years. Across the UK, different approaches to REM are being taken and legislation is expected to be in place across all 4 countries within the next few years.The Fisheries Act (2020) requires the development of Fisheries Management Plans (FMPs) (replacing EU Multi-Annual Plans) in the UK. 43 FMPs have been proposed and are at various stages of development and implementation, these should all be published by the end of 2028. FMPs have the potential to be very important tools for managing UK fisheries, although data limitations may delay them for some stocks. It is also essential the UK governments define and adopt a standardised approach or model across the four nations to a universally defined FMP design, to ensure the consistence, quality and coherence of all the proposal FMPs.The Marine Conservation Society is keen to see publicly available Fishery Management Plans for all commercially exploited stocks, especially where stocks are depleted, that include:An overview of the fishery including current stock status, spatial coverage, current fishing methods and impactsTargets for fishing pressure and biomass, and additional management when those targets are not being met, based on the best scientific evidenceTimeframes for stock recoveryImproved data collection, transparency, and accountability, supported by technologies such as Remote Electronic Monitoring (REM)Consideration of wider environmental impacts of the fishery, including habitat impacts and minimising bycatchStakeholder engagement

Crab and lobster pots have low seabed impacts when deployed and retrieved correctly. They are also selective towards larger individuals, and can mitigate bycatch through escape panels.In the UK, brown crab and European lobster are fished together in a mixed fishery with seasonal and regional variation of target species taking place. Lobsters are caught in pots, also known as creels, and can be fished individually or as part of a fleet of up to 100 pots, depending on the size of the boat and crew. Pots are portable traps made of wood or steel wire and plastic. The lobster is baited into the initial part (the chamber) and moves into the secondary part (the parlour) where it becomes trapped.In crab and lobster fisheries, there is no legislation or regulation to standardise the type of pot used. They tend to be highly selective as undersized animals can be returned to the sea alive and survival rates for non-target organisms are thought to be high. Studies of Irish Sea potting fisheries shown that common bycatch species are velvet crabs, small-spotted catsharks, and squat lobsters. While more than half of the bycatch is predicted to survive, there is little research available to support this. Measures to further reduce bycatch include the use of escape panels to allow undersize animals and bycatch to escape pots.Habitat impacts from potting are low but can occur during deployment, soak time or hauling of the pot, impacting the benthic habitat and associated species through contact with the pot or end weight, or by scouring from ropes. Research that has taken place suggests that while some damage does occur, it is unlikely to be significant unless potting intensity is high (defined as approximately 30 pots per 500 square metres). The most damage occurs when traps are set in sensitive habitats, including seagrass beds. These ecosystems play a crucial role in supporting marine biodiversity by providing nursery grounds, shelter from predators, and settlement areas for invertebrate spat.To safeguard these vulnerable habitats, several marine areas have been designated as Marine Nature Reserves (MNRs) in Isle of Man territorial waters. Static fishing gear (including pots) are allowed, except in the following eelgrass conservation zones: Baie Ny Carrickey, Langness, Laxey Bay and Ramsey Bay.Lost pots can pose an additional risk to marine life through ‘ghost fishing’, where abandoned gear continues to trap and entangle species. As fishing gear is a financial investment, there is incentive to maintain and recover lost pots. The occurrence of ghost fishing can also be reduced by the use of appropriate gear designs and release devices.To improve monitoring and reporting of fishing activity, The Marine Conservation Society would like to see remote electronic monitoring (REM) with cameras implemented, used and enforced.

Bloor, I., Coleman, M., Garratt, M., & Jenkins, S. (2025). Isle of Man Annual Fisheries Science Report 2024. Available at: AnnualReport2024_Final.pdf [Accessed on 25.11.2025]Coleman, R.A., Hoskin, M.G., von Carlshausen, E. and Davis, C.M., 2013. Using a No-take Zone to Assess the Impacts of Fishing: Sessile Epifauna Appear Insensitive to Environmental Disturbances From Commercial Potting. Journal of experimental marine biology and ecology, v. 440 ,. pp. 100-107. doi: 10.1016/j.jembe.2012.12.005DEFA. (2021) Management of the crab and lobster fisheries within the Isle of Man territorial sea [online] Available at: Sample Memorandum of Understanding Template (Accessed on 07.10.2025)DEFA. (2020) Consultation on the Future Management of the Isle of Man Crab & Lobster Fisheries in Isle of Man Territorial Water [online] Available at: Consultation on the Future Management of the Isle of Man Crab & Lobster Fisheries in Isle of Man Territorial Waters - Cabinet Office of the Isle of Man Government - Citizen Space (Accessed on 07.10.2025)DEFA. (2020) Summary of Responses to Consultation: Consultation on the Future Management of the Isle of Man Crab & Lobster Fisheries in Isle of Man Territorial Waters [online] Available at: Consultation on the Future Management of the Isle of Man Crab & Lobster Fisheries in Isle of Man Territorial Waters - Cabinet Office of the Isle of Man Government - Citizen Space (Accessed on 07.10.2025)Emmerson, J. A. (2020 Minimum Conservation Reference Size (MCRS) changes in the lobster (H. gammarus) fishery; expected short-term costs and long-term benefits. Evidence to support the crab and lobster consultation (2020). Sustainable Fisheries and Aquaculture Report No. IOM 2, Bangor University. pp. 1 – 8. Emmerson, J. A., Bloor, I.S.M, Jenkins, S.R. (2020) An overview of the crab and lobster fishery in the Isle of Man territorial sea; catch & effort trends, licencing, and latency. Sustainable Fisheries & Aquaculture Group No. IOM 1, Bangor University. pp. 1 – 9Gall, S.C., Rodwell, L.D., Clark, S., Robbins, T., Attrill, M.J., Holmes, L.A. and Sheehan, E.V., 2020. The impact of potting for crustaceans on temperate rocky reef habitats: Implications for management, Marine Environmental Research, Volume 162, 105134, https://doi.org/10.1016/j.marenvres.2020.105134.Gov.im (2025) Legislation, Policy and Guidance. [online] Available at: Isle of Man Government - Legislation, Policy and Guidance (Accessed on 07.10.2025)Gov.im (2025) Minimum landing sizes. [online] Available at: Isle of Man Government - Commercial fishing (Accessed on 25.11.2025)Gov.im (2022) SEA FISHERIES (LICENSING) (RECREATIONAL CRAB AND LOBSTER) REGULATIONS 2022. [online] Available at: Sea Fisheries (Licensing) (Recreational Crab and Lobster) Regulations 2022 (Accessed on 07.10.2025)Gov.im (2018) MANX MARINE NATURE RESERVES BYELAWS 2018 [online] Available at: Manx Marine Nature Reserves Byelaws 2018 (Accessed on 07.10.2025)GOV.UK, 2025. Guidance: Record your catch. Available at: Record your catch - GOV.UK [Accessed on 20.11.2025]GOV.UK. 2025. Manage your fishing effort: Western Waters crabs and scallops. Available at https://www.gov.uk/guidance/manage-your-fishing-effort-western-waters-crabs [Accessed on 24.11.2025].ICES. 2023. Working Group on the Biology and Life History of Crabs (WGCRAB; outputs from 2020–2022 meetings). ICES Scientific Reports. 5:110. 123 pp. https://doi.org/10.17895/ices.pub.24720936Öndes, F., Kaiser, M., & Murray, L. 2018. Fish and invertebrate by-catch in the crab pot fishery in the Isle of Man, Irish Sea. Journal of the Marine Biological Association of the United Kingdom, 98(8), 2099-2111. doi:10.1017/S0025315417001643Palomares, M.L.D. and D. Pauly. Editors. 2025. SeaLifeBase. Homarus gammarus, European lobster. World Wide Web electronic publication. www.sealifebase.org, version (04/2025) [Accessed on 18.11.2025].Seafish. Pots and Traps – General. Available at: seafish.org/responsible-sourcing/fishing-gear-database/gear/pots-and-traps-general/#target-species [Accessed on 18.11.2025]