AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Corella eumyota | |
Date of the first record (?) | 2009 - 2013 References (not structured): National Biodiversity Network gateway: http://data.nbn.org.uk [11 March 2013] Comments: It is a recent arrival to Britain. A single locality record from near Mersea Island, Essex. This species may be expected to expand its range rapidly. |
Recipient region (?) | Country: United Kingdom (Britain) LME: 22. North Sea |
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Source region (?) | Ocean: Atlantic --> Ocean region: SE Atlantic --> Ocean region: SW Atlantic Ocean: Pacific --> Ocean region: SW Pacific References (not structured): Lambert G (2004) The south temperate and Antarctic ascidian Corella eumyota reported in two harbours in north-western France. Journal of the Marine Biological Association of the United Kingdom 84: 239-241. Lagger C, Haussermann V, Forsterra G, Tatian M (2009) Ascidians from the southern Chilean Comau Fjord. Spixiana 32(2): 173-185. Varela, M. M., de Matos-Pita, S. S., Ramil, F. & Ramos- Esplá, A. A. 2007. New report of the Antarctic ascidian Corella eumyota (Tunicata: Ascidiacea) on the Galician coast (north-west Spain). Journal of the Marine Biological Association of the United Kingdom 2 – Biodiversity Records 1-3. Comments: It is widely distributed in the southern hemisphere in Antarctica, Australia, Argentina, Chile, New Zealand and some southern Atlantic and Pacific Islands. The first record in Europe was from France in 2002 and Lambert (2004) concludes that this was unlikely to be the first site of colonisation in northern Europe. It now appears in Galicia. Also known from the Orkneys with first record 2012: Kakkonen JE, Worsfold TM, Ashelby CW, Taylor A, Beaton K (2019) The value of regular monitoring and diverse sampling techniques to assess aquatic non-native species: a case study from Orkney. Management of Biological Invasions 10(1): 46–79, https://doi.org/10.3391/mbi.2019.10.1.04 (and references therein). |
Pathway / Vector (?) | Level of certainty: Highly likely Pathway: Vessels Vector: (Highly likely) Ship’s hull References (not structured): Arenas F, Bishop JDD, Carlton JT, Dyrynda PJ, Farnham WF, Gonzalez DJ, Jacobs MW, Lambert C, Lamber G, Nielsen SE, Pederson JA, Porter JS, Ward S, Wood CA (2006). Alien species and other notable records from a rapid assessment survey of marinas on the south coast of England. Journal of the Marine Biological Association of the United Kingdom, 86, 1329-1337. Minchin, D. (2007). Rapid coastal survey for targeted alien species associated with floating pontoons in Ireland. Aquatic Invasions, 2(1), 63-70. Arenas F, Bishop JDD, Carlton JT, Dyrynda PJ, Farnham WF,Gonzalez DJ, Jacobs MW, Lambert C, Lambert G, Nielsen SE, Pederson JA, Porter JS, Ward S, Wood CA (2006) Alien species and other notable records from a rapid assessment survey of marinas on the south coast of England. Journal of the Marine Biological Association of the United Kingdom 86: 1329-1337. Comments: This species is spreading rapidly and is almost certainly being spread on leisure craft hulls where it is found at marina sites and anchorages. May have been spread from infested marinas on the south coast of Britain or from continental Europe. However, as there is cultivation of molluscs in the associated area the transmission with oyster stock movements is a possibility. |
Habitat type (?) | Aquaculture sites Estuary Marina Port vicinity Ports Sheltered coastal area References (not structured): Arenas F, Bishop JDD, Carlton JT, Dyrynda PJ, Farnham WF, Gonzalez DJ, Jacobs MW, Lambert C, Lamber G, Nielsen SE, Pederson JA, Porter JS, Ward S, Wood CA (2006). Alien species and other notable records from a rapid assessment survey of marinas on the south coast of England. Journal of the Marine Biological Association of the United Kingdom, 86, 1329-1337. Collin SB, Oakley JA, Sewell J, Bishop JDD (2010) Widespread occurrence of the non-indigenous ascidian Corell eumyota Traustedt, 1882 on the shores of Plymouth Sound and Estuaries Special Area of Conservation, UK. Aquatic Invasions 5(2): 175-179. Comments: The tunicate was found in an estuarine area where there are small craft and aquaculture activities. |
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Wave exposure (?) | Sheltered References (not structured): Collin SB, Oakley JA, Sewell J, Bishop JDD (2010) Widespread occurrence of the non-indigenous ascidian Corella eumyota Traustedt, 1882 on the shores of Plymouth Sound and Estuaries Special Area of Conservation, UK. Aquatic Invasions 5(2): 175-179. Comments: The current locality is in a sheltered area with moderate tidal movements. In the Plymouth regions some have been found in semi-exposed and exposed areas. |
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Salinity range (?) | Venice system: 6. Polymixohaline [18-30psu] 7. Euhaline [30-40psu] References (not structured): Lagger C, Haussermann V, Forsterra G, Tatian M (2009) Ascidians from the southern Chilean Comau Fjord. Spixiana 32(2): 173-185. Comments: In Chile it is found in fjiords that have periods of reduced salinity. It is unclear whether C. eumyota occurs only below the halocline. |
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Temperature range (?) | Unknown |
Zonation / Substratum (?) | Benthic: Littoral (Benthic) Sublittoral beyond photic zone Substratum: Artificial (manmade) Biogenic (living or nonliving) Hard (cobbles to bedrock) References (not structured): Collin SB, Oakley JA, Sewell J, Bishop JDD (2010) Widespread occurrence of the non-indigenous ascidian Corell eumyota Traustedt, 1882 on the shores of Plymouth Sound and Estuaries Special Area of Conservation, UK. Aquatic Invasions 5(2): 175-179. Forrest BM, Hopkins GA, Dodgshun TJ, Gardner JPA (2007) Efficacy of acetic acid treatments in the management of marine biofouling. Aquaculture 262: 319-332, Comments: It is found on natural, semi-natural areas of shore and on marina pontoons. In New Zealand it is known to overgrow mussels in cultivation. |
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Reproductive duration (?) | Medium References (not structured): Dupont L, Viard, F, David P, Bishop JDD (2007) Combined effects of bottlenecks and selfing in populations of Corella eumyota, a recently introduced sea squirt in the English Channel. Diversity and Distributions 13: 808–817. Lambert CC, Lambert IM, Lambert G (1995). Brooding Strategies in Solitary Ascidians - Corella Species from North and South Temperate Waters. Canadian Journal of Zoology-Revue Canadienne De Zoologie, 73, 1666-1671. Comments: This tunicate broods its embryos and releases free-swimming larvae that are pelagic for minutes. The species is capable of self-fertilization. Clones of densely packed colonies are often revealed. Reproduces once temperatures attain 15 oC. | |
Reproductive seasonality (?) | Jul. References (not structured): Lambert G (2004) The south temperate and Antarctic ascidian Corella eumyota reported in two harbours in north-western France. Journal of the Marine Biological Association of the United Kingdom 84: 239-241. Brewin B (1946) Ascidians in the vicinity of the Portobello Marine Biological Station, Otago Harbour. Transactions of the Royal Society of New Zealand, 76, 87-131. Comments: In New Zealand it spawns during the summer period and once temperatures are 15 oC or greater. Lambert (2004) found them brooding larvae in July in France. |
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Migration pattern (?) | Unknown |
Population status (?) | Established (Low level of certainty) References (not structured): Arenas F, Bishop JDD, Carlton JT, Dyrynda PJ, Farnham WF, Gonzalez DJ, Jacobs MW, Lambert C, Lambert G,Nielsen SE, Pederson JA, Porter JS, Ward S, Wood CA (2006) Alien species and other notable records from a rapid assessment survey of marinas on the south coast of England. Journal of the Marine Biological Association of the United Kingdom 86: 1329-1337. National Biodiversity Network gateway: http://data.nbn.org.uk [11 March 2013] Comments: The species is likely to be common in Essex and may be more widely distributed than has been reported. |
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Species status (?) | Non-indigenous species References (not structured): Kakkonen JE, Worsfold TM, Ashelby CW, Taylor A, Beaton K (2019) The value of regular monitoring and diverse sampling techniques to assess aquatic non-native species: a case study from Orkney. Management of Biological Invasions 10(1): 46–79, https://doi.org/10.3391/mbi.2019.10.1.04 (and references therein). |
Ports | Port #1/2: Kirkwall Date of the first record: 2014 Population status: Established Port #2/2: Scapa Flow Date of the first record: 2014 - 2015 Population status: Established Comments: Established in Stromness harbour area including in Stromness marina. |
Port vicinities | Port vicinity: Scapa Flow Date of the first record: 2014 - 2015 Population status: Established |
Created by | Dan Minchin, 2013-03-11 |
Last update by | Stephan Gollasch, 2020-02-07 |