Lobster, European

Homarus gammarus

Method of production — Caught at sea
Capture method — Pot or creel
Capture area — North East Atlantic (FAO 27)
Stock area — East Anglia
Stock detail — 4c: Eastern IFCA District (0-6nm)
Picture of Lobster, European

Sustainability rating four info

Sustainability overview

Updated: December 2020.

In the East Anglia area, fishing mortality is high, above the maximum reference point for both sexes and fishing pressure is reported to be particularly high on lobsters around the minimum conservation reference size (MCRS). Spawning stock biomass for both sexes is low, below the minimum reference point and CEFAS reports that the uncertainty on this stock status is high. Management measures in place include a ban on the landing of berried and v-notched lobsters, and a MCRS of 87mm carapace length, but there are no catch or effort limitations in place. Management measures are considered insufficient to recover the stock. Each year, Eastern IFCA produce stock assessments and are currently carrying out research into the impacts of fishing on the Cromer Shoal Chalk Bed MCZ. In general, pot fishing is considered sustainable as it is selective for larger individuals and has minimal impact on surrounding environment.

Biology

The lobster’s appearance is unmistakable: dark blue shell (turns red only when boiled) with pale yellow markings and long red antennae. The claws are of unequal size, with one large crushing claw and a slimmer cutting claw. European lobster can be found from Scandinavia to North Africa, including the Mediterranean and Black Seas, where they occupy solitary shelters in rocky substrates at depths of 0 to 150 m, but usually not deeper than 50 m. They are nocturnal and territorial animals living in holes or crevices. Common total length: 23 to 50 cm (maximum length 100 cm), maximum weight 9kg. In the absence of exploitation the life span is probably 10 years, but they may live 50 years or more. They are opportunistic scavengers, as well as preying on small crustaceans, molluscs and polychaetes. European lobsters are sedentary animals with home ranges varying from 2 to 10 km, although some inshore/offshore and longshore migration may take place. In most areas lobsters do not mature before 5 to 8 years (depending on water temperature), with females maturing at around 7.5-8.0 cm carapace length (CL). Males reach sexual maturity earlier than females. Genetic data suggests that females in the wild mate with a single male. Results from tank experiments demonstrate that individual males can fertilise several females in the same season and this is likely to be the case in the wild. Thus the normal breeding system in the wild is likely to be polygynous. Lobsters mate in late summer when the females moult, but females can store the sperm packet over the winter so eggs are not fertilised and laid until the following summer (around July). Since eggs are carried for 10 to 11 months, females with eggs (termed ‘berried’) are usually found throughout the year. Moulting occurs in summer, approximately once a year for adults, becoming less frequent in older animals, and mating occurs soon after the female has moulted. There are 3 larval stages, lasting 3-4 weeks, before the post-larvae settle on the seabed. Larval distribution depends on local hydrographical conditions and pre-recruit behaviour, and as such, is highly variable.

Stock information

Criterion score: 1 info

European lobster can be found from Scandinavia to North Africa. CEFAS defines six Lobster Fishery Units for England and publishes stock status reports for each area every 2 years.

In the latest stock assessment (2019), fishing mortality (F) of European lobster in East Anglia is high, above the maximum reference point for both males and females. The fishing pressure is reported to be particularly high on animals around the Minimum Conservation Reference Size (MCRS).

The spawning stock biomass (SSB) of both sexes is low, below the minimum reference point limit. Low sampling levels make the uncertainty on stock status high for this stock and no assessment was presented for 2015-2016 due to insufficient sampling.

Management

Criterion score: 0.75 info

This assessment is for the European lobster fishery in the Eastern Inshore Fisheries and Conservation Authority (IFCA). Management measures in place for this fishery are currently not effective in managing 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 the vessel, vessel registration number, gear type, area and port of landing. All vessels over 10m do not need to complete MSAR as they will be completing an EU logbook of catches. For all vessels, effort is reported as days fished, and not as pots fished. In the Eastern IFCA district, there are no vessel length restrictions in place and you do not need a permit to fish commercially for crabs and lobsters. Eastern IFCA are planning to introduce a permit byelaw to allow them to better understand fishing activity.

Crab and lobster fisheries are not limited by EU Total Allowable Catch (TAC) regulations or national regulations, and therefore are not limited in the number of lobsters they can take. Eastern IFCA has also not introduced a pot limit for crab and lobster fisheries.

In this area, there is a Minimum Conservation Reference Size (MCRS) of 87mm carapace length. According to CEFAS, around 99-100% of males and 92% of females should be sexually mature at this size. National legislation in England and Wales also prohibits the landing of berried lobsters and those with a v-notch in their tail fan. V-notching of lobsters requires removing a V-shaped piece of exoskeleton from the uropod (inner tail flap) of female lobsters of reproductive size which are carrying eggs, then returning the lobster to the sea. This allows other fishermen to know not to land this lobster as it is reproducing.


The UK Fisheries Act came into force in January 2021 and requires the development of Fisheries Management Plans (FMPs). There are no details yet on how and when these will be developed. FMPs have the potential to be very important tools for managing UK fisheries, although data limitations may delay them for some stocks. MCS is keen to see FMPs for all commercially exploited stocks, especially where stocks are depleted, that include:
Targets for fishing pressure and biomass, and additional management when those targets are not being met
Timeframes for stock recovery
Technologies such as Remote Electronic Monitoring (REM) to support data collection and improve transparency and accountability
Consideration of wider environmental impacts of the fishery

Capture Information

Criterion score: 0 info

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 European lobster in the UK takes place in summer and autumn. 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.

Pot fishing is considered sustainable as it is selective for larger individuals and has minimal impact on the surrounding environment. In European 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. 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.

In the Eastern IFCA district, pot fishing takes place in the Cromer Shoal Marine Conservation Zone (MCZ) and in 2020, research was carried out into the impact of potting on the chalk bed. Results from this research show that permanent damage is occurring to the chalk bed as a result of human activity and crab and lobster potting. Although each individual occurrence of damage was small-scale, the additive effect of these small-scale impacts over time could be altering the chalk bed on a larger scale in a more rapid and focused way than natural change would be. It was estimated that on a single day in October 2019, up to 8,000 individual pots were deployed on the chalk reef. This was acknowledged to be a very crude estimate of potting activity, but it gives an indication of scale. The survey found that some of the chalk damage can be attributed to active crab and lobster pots, however, some damage is also occurring from submerged pots that are not actively used (i.e. lost, stored, or territory marking). Much of the damage caused was by rope, rather than the pots themselves.

References

Cefas. 2020. Lobster (Homarus gammarus). Cefas Stock Status Report 2019 18 pp. Available at https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/928795/Lobster_assessments_2019..pdf [Accessed on 01.12.2020].

Eastern Inshore Fisheries and Conservation Authority. 2018. Crab and Lobster Stock Assessment. Available at https://www.eastern-ifca.gov.uk/wp-content/uploads/2019/09/2019_04_25_Crustacean_Stock_Assessment_report_2018.pdf [Accessed on 01.12.2020].

Eastern Inshore Fisheries and Conservation Authority. Byelaws. Available at https://www.eastern-ifca.gov.uk/byelaws/ [Accessed on 01.12.2020].

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 08.12.2020].

> Marine Management Organisation. 2018. Statutory guidance: Minimum Conservation Reference Sizes (MCRS) in UK waters. Available at https://www.gov.uk/government/publications/minimum-conservation-reference-sizes-mcrs/minimum-conservation-reference-sizes-mcrs-in-uk-waters#crustaceans [Accessed on 01.12.2020].

Moffat, C., Richardson, H. and Roberts, G. 2020. Natural England marine chalk characterisation project. Natural England Report NERR080. Available at http://publications.naturalengland.org.uk/publication/5385776319954944#:~:text=Natural%20England%20Marine%20Chalk%20Characterisation%20Project%20(NERR080),England%20on%202%20March%202020%20.&text=Marine%20chalk%20is%20protected%20within,marine%20chalk%20as%20a%20feature [Accessed on 01.12.2020].

Palomares, M.L.D. and Pauly, D. Editors. 2020. SeaLife Base. Homarus gammarus, European lobster. Available at https://www.sealifebase.ca/summary/Homarus-gammarus.html [Accessed on 01.12.2020].

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 07.12.2020].

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. Available at https://doi.org/10.1093/icesjms/fsaa135 [Accessed on 08.12.2020].

Tibbitt, F., Love, J., Wright, J., Chamberlain, J. 2020. Human Impacts on Cromer Shoal Chalk Beds MCZ: Chalk complexity and population dynamics of commercial crustaceans. Natural England Research Report number 04412. Available at https://www.eastern-ifca.gov.uk/wp-content/uploads/2020/10/D2020-00111615-NERR-Human-Impacts-on-the-Cromer-Shoal-Chalk-Beds-MCZ.pdf [Accessed on 01.12.2020[.

UK Government. 2020. UK sea fisheries annual statistics report 2019. Available at https://www.gov.uk/government/statistics/uk-sea-fisheries-annual-statistics-report-2019 [Accessed on 07.12.2020].