Brown crab

This stock is data limited and the stock status of brown crab in the Irish Sea is unknown. There is concern for biomass (owing to lack of any data) but no concern for fishing pressure.In the North Western IFCA district, brown crab are fished both commercially and recreationally. They are mainly fished off the Cumbrian coast and around Walney Island.This stock is data limited and the stock status of brown crab in the Irish Sea is unknown. There is concern for biomass (owing to lack of any data) but no concern for fishing pressure. Brown crab has a high resilience to fishing pressure.At present, there is no stock assessment available for brown crab in the Irish Sea. Landings data provided by the Marine Management Organisation (MMO) show that landings of brown crab in the Irish Sea in English waters increased from 46.42 tonnes in 2014 to 129 tonnes in 2018 before decreasing in 2019 to 88 tonnes and increasing again to 129 tonnes in 2022. Therefore, landings appear to be within the normal range.

This assessment is for the brown crab fishery (Irish Sea stock) in the North Western Inshore Fisheries and Conservation Authority (IFCA) district. Management measures in place for this fishery are not effective in managing the stock.This is a very data limited fishery and management will benefit significantly from a better understanding of the stock.All vessels registered in the UK must have a domestic fishing vessel license to fish within the UK EEZ for sea fish that will be sold. No new licenses are being issued. All commercial vessels under 10m, with a shellfish license, are required to complete Monthly Shellfish Activity Return (MSAR) forms for the Marine Management Organisation (MMO). These must include the catch and retained weight each day along with the date, name of vessel, vessel registration number, gear type, area and port of landing. All vessels over 10m do not need to complete MSAR forms as they will be completing a logbook of catches. For all vessels, effort is reported as days fished, and not as pots fished.National legislation in England and Wales also prohibits the landing of berried and soft crabs. In addition, when using pots or creels, a maximum of 1% by weight of the total catch of brown crabs landed may consist of detached claws. For all other gear types, a maximum of 75kg of detached claws may be landed. In many areas, market preference can also have influence on the crabs which are landed, as those having an 'unclean' appearance, due to disease or discolouration, or those missing both claws, can be seen as unmarketable.Crab and lobster fisheries are not limited by Total Allowable Catch (TAC) regulations, and therefore are not limited in the number of crabs they can take. North Western IFCA have also not introduced a pot limit for crab and lobster fisheries.North Western IFCA also have the following byelaws in place:A permit is required to fish commercially for crab and lobster in the IFCA district.A minimum conservation reference size (MCRS) of 130mm.A least one unobstructed escape gap in the lowets part of the pot.A vessel length limit of 10m in the 0-3nm zone, and 15m in the 3-6nm zone.The removal of parts of crab is prohibited.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 engagementA crab and lobster FMP for English waters has been proposed, coordinated by Defra, in partnership with Seafish that incorporates this stock. At the time of writing, it is too soon to know whether proposed management measures will be effective in managing the stock. For more information about this FMP and expected progress and timelines, see https://www.gov.uk/government/publications/crab-and-lobster-fisheries-management-plan-fmp-for-english-waters.

Pot fishing is considered sustainable as it is selective for larger individuals and has minimal impact on the surrounding environment.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. The key fishing season for brown crab in the UK takes place from May to December. Crabs 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 crab is baited into the initial part (the chamber) and moves into the secondary part (the parlour) where it becomes trapped.In brown crab 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. More than half of the bycatch caught are predicted to survive, although there is little available research to prove 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). Most damage occurs where traps are set in rocky habitats that are home to corals, sponges, sea whips and other large emergent species. These habitats and species provide nursery areas, refuges from predators and habitat for the settlement of invertebrate spat.In some circumstances, there can be instances of ghost fishing, when lost fishing gear continues to fish and can entangle a variety of species, but this can be minimised by using appropriate gear and release devices.

Cefas. 2023. Edible crab (Cancer pagurus). Cefas Stock Status Report 2023. 27 pp. Available at https://assets.publishing.service.gov.uk/media/66325aeedf4c0c63311e413e/2023_Crab_stock_assessments_FINAL...pdf [Accessed on 26.06.2024].CBI. 2022. Entering the European market for crab. Available at https://www.cbi.eu/market-information/fish-seafood/crab/market-entry [Accessed on 26.06.2024].Gall, 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, 162, p.105134. Available at https://www.sciencedirect.com/science/article/abs/pii/S0141113619308657 [Accessed on 26.06.2024].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. Available at https://doi.org/10.17895/ices.pub.24720936 [Accessed on 26.06.2024].Marine Management Organisation (MMO). Minimum Conservation Reference Sizes (MCRS) in UK waters. 2018. Available at https://www.gov.uk/government/publications/minimum-conservation-reference-sizes-mcrs/minimum-conservation-reference-sizes-mcrs-in-uk-waters [Accessed on 26.06.2024].Mesquita, C., Dobby, H., Pierce, G.J., Jones, C.S., Fernandes, P.G. 2020. Abundance and spatial distribution of brown crab (Cancer pagurus) from fishery-independent dredge and trawl surveys in the North Sea. ICES Journal of Marine Science, fsaa105. Available at https://academic.oup.com/icesjms/advance-article/doi/10.1093/icesjms/fsaa105/5880823 [Accessed on 26.06.2024].Moffat, C., Richardson, H. and Roberts, G. 2020. Natural England marine chalk characterisation project. Natural England Report NERR080. Available at https://publications.naturalengland.org.uk/publication/5385776319954944 [Accessed on 26.06.2024].North Western Inshore Fisheries and Conservation Authority. Byelaws. Available at https://www.nw-ifca.gov.uk/byelaws/ [Accessed on 26.06.2024].Palomares, M.L.D. and Pauly, D. Editors. 2024. SeaLife Base. Cancer pagurus, edible crab. Available at https://www.sealifebase.ca/summary/Cancer-pagurus.html [Accessed on 26.06.2024].Seafish. Pots and traps - Brown Crab. Available at https://www.seafish.org/responsible-sourcing/fishing-gear-database/gear/pots-and-traps-brown-crab/ [Accessed on 26.06.2024].Siikavuopio, S. I., Thesslund, T. and Gallagher, M. The development of a formed bait solution for the Irish Whelk Fishery. Original project title: New bait for brown crab. Available at https://fisheryprogress.org/sites/default/files/documents_actions/Whelk%20Bait%20Phase%201%20Report.pdf [Accessed on 26.06.2024].Spoors, F., Mendo, T., Khan, N. and James, M. 2021. Assessing bait use by static gear fishers of the Scottish inshore fisheries: A preliminary study. Fisheries Research. Volume 240, August 2021, 105974. Available at https://www.sciencedirect.com/science/article/abs/pii/S0165783621001028 [Accessed on 26.06.2024].Stevens, B. G. 2020. The ups and downs of traps: environmental impacts, entanglement, mitigation, and the future of trap fishing for crustaceans and fish, ICES Journal of Marine Science. Volume 78, Issue 2, March 2021, pp. 584-596. Available at https://doi.org/10.1093/icesjms/fsaa135 [Accessed on 26.06.2024].