AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Didemnum vexillum [WoRMS] | |
Authority | Kott, 2002 | |
Family | Didemnidae | |
Order | Aplousobranchia | |
Class | Ascidiacea | |
Phylum | Chordata | |
Synonym (?) | Carpet Tunicate | |
Sub-species level (?) | Not entered |
Native origin (?) | Country: Japan References (not structured): Bullard SG, Lambert G, Carman MR, Byrnes J, Whitlatch RB, Ruiz GM, Miller RJ, Harris L, Valentine PC, Collie JS, Pederson J, McNaught DC, Cohen AN, Asch RB, Dijkstra J, Heinonen K (2007) The colonial ascidian Didemnum sp. A: Current distribution, basic biology and potential threat to marine communities of the northeast and west coasts of North America. Journal of Experimental Biology and Ecology 342: 99–108, http://dx.doi.org/10.1016/j.jembe.2006.10.020 |
Life form / Life stage (?) |
References (not structured): Locke, A., & Carman, M. (2009). In situ growth of the colonial ascidian Didemnum vexillum under different environmental conditions. Aquatic Invasions,4(1), 275-278. Comments: Larvae have adhesive papillae |
Sociability / Life stage (?) |
References (not structured): Locke, A., & Carman, M. (2009). In situ growth of the colonial ascidian Didemnum vexillum under different environmental conditions. Aquatic Invasions,4(1), 275-278. Comments: encrusting or lobate colonies |
Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Asexual Sexual References: Lengyel, N. L., Collie, J. S., & Valentine, P. C. (2009). The invasive colonial ascidian Didemnum vexillum on Georges Bank—ecological effects and genetic identification. Aquatic Invasions, 4(1), 143-152. Comments: Asexual reproduction by fragmentation: fragments can be transported by currents up to 20 km. Only 6 hours are needed for settlement. Sexual reproduction is involved in larger-scale spread |
Developmental trait (?) | Brooding Spawning References: Daniel, K., & Therriault, T. W. (2007). Biological synopsis of the invasive tunicate Didemnum sp. Fisheries and Oceans Canada, Pacific Biological Station. |
Characteristic feeding method / Life stage (?) |
References (not structured): Daniel, K., & Therriault, T. W. (2007). Biological synopsis of the invasive tunicate Didemnum sp. Fisheries and Oceans Canada, Pacific Biological Station. |
Mobility / Life stage (?) |
References (not structured): Lengyel, N. L., Collie, J. S., & Valentine, P. C. (2009). The invasive colonial ascidian Didemnum vexillum on Georges Bank—ecological effects and genetic identification. Aquatic Invasions, 4(1), 143-152. Comments: Larvae swim for a few hours before settlement. |
Salinity tolerance range (?) | Venice system: 6. Polymixohaline [18-30psu] 7. Euhaline [30-40psu] References: Locke, A., & Carman, M. (2009). Adventures of a sea squirt sleuth: unraveling the identity of Didemnum vexillum, a global ascidian invader. Aquatic Invasions,4(1), 5-28. Comments: At 26-30 ppt it has maximum survival |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Lengyel, N. L., Collie, J. S., & Valentine, P. C. (2009). The invasive colonial ascidian Didemnum vexillum on Georges Bank—ecological effects and genetic identification. Aquatic Invasions, 4(1), 143-152. Herborg, L. M., O’Hara, P., & Therriault, T. W. (2009). Forecasting the potential distribution of the invasive tunicate Didemnum vexillum. Journal of Applied Ecology, 46(1), 64-72. Morris Jr, J. A., & Carman, M. R. (2012). Fragment reattachment, reproductive status, and health indicators of the invasive colonial tunicate Didemnum vexillum with implications for dispersal. Biological Invasions, 14(10), 2133-2140. Mercer, J.M., Whitlatch, R.B. and Osman, R.W. (2009). Potentialeffects of the invasive colonial ascidian (Didemnum vexillum Kott, 2002) on pebble-cobble bottom habitats in Long Island Sound, USA. Aquatic Invasions, 4(1), 133-142 Comments: Impacts on benthic community; it creates substrate for macrozoobenthos, facilitating polychaetes. It alters qualitative and quantitative composition of fisheries |
Toxicity / Life stage (?) | Unknown Comments: Not available. |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Known References: AquaNIS. Editorial Board, 2015. Information system on Aquatic Non-Indigenous and Cryptogenic Species. World Wide Web electronic publication. www.corpi.ku.lt/databases/aquanis. Version 2.36+. Accessed 2021-09-02. Herborg, L. M., O’Hara, P., & Therriault, T. W. (2009). Forecasting the potential distribution of the invasive tunicate Didemnum vexillum. Journal of Applied Ecology, 46(1), 64-72. Minchin, D. (2007). Rapid coastal survey for targeted alien species associated with floating pontoons in Ireland. Aquatic Invasions, 2(1), 63-70. Simpson, T. J., Dias, P. J., Snow, M., Muñoz, J., & Berry, T. (2017). Real‐time PCR detection of Didemnum perlucidum (Monniot, 1983) and Didemnum vexillum (Kott, 2002) in an applied routine marine biosecurity context. Molecular Ecology Resources, 17(3), 443-453. Valentine PC, Collie JS, Reid RN, Asch RG, Guida VG, Blackwood DS (2007) The occurrence of the colonial ascidian Didemnum sp. on Georges Bank gravel habitat - Ecological observations and potential effects on groundfish and scallop fisheries. Journal of Experimental Marine Biology and Ecology 342: 179-181, doi:10.1016/j.jembe.2006.10.038 Comments: Impacts on food availability for economically important juvenile fishes (Valentine et al., 2007). |
Known measurable environmental impact? | Known References: AquaNIS. Editorial Board, 2015. Information system on Aquatic Non-Indigenous and Cryptogenic Species. World Wide Web electronic publication. www.corpi.ku.lt/databases/aquanis. Version 2.36+. Accessed 2021-09-02. Herborg, L. M., O’Hara, P., & Therriault, T. W. (2009). Forecasting the potential distribution of the invasive tunicate Didemnum vexillum. Journal of Applied Ecology, 46(1), 64-72. Minchin, D. (2007). Rapid coastal survey for targeted alien species associated with floating pontoons in Ireland. Aquatic Invasions, 2(1), 63-70. Simpson, T. J., Dias, P. J., Snow, M., Muñoz, J., & Berry, T. (2017). Real‐time PCR detection of Didemnum perlucidum (Monniot, 1983) and Didemnum vexillum (Kott, 2002) in an applied routine marine biosecurity context. Molecular Ecology Resources, 17(3), 443-453. Valentine PC, Collie JS, Reid RN, Asch RG, Guida VG, Blackwood DS (2007) The occurrence of the colonial ascidian Didemnum sp. on Georges Bank gravel habitat - Ecological observations and potential effects on groundfish and scallop fisheries. Journal of Experimental Marine Biology and Ecology 342: 179-181, doi:10.1016/j.jembe.2006.10.038 Comments: Displacement of native species (Minchin et al., 2007). |
Included in the Target Species list? | Yes Comments: Assessed by the COMPLETE project experts (2021), included in target species list. |
Association with vessel vectors (?) | Biofouling References: Locke, A., & Carman, M. (2009). Adventures of a sea squirt sleuth: unraveling the identity of Didemnum vexillum, a global ascidian invader. Aquatic Invasions,4(1), 5-28. |
Last update by | Sandra Gečaitė, 2024-07-11 |