AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Corella eumyota [WoRMS] | |
Authority | Traustedt, 1882 | |
Family | Corellidae | |
Order | Phlebobranchia | |
Class | Ascidiacea | |
Phylum | Chordata | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | LME: 61. Antarctic Comments: Circum-Antarctic, South Pacific, Antarctic seas |
Life form / Life stage (?) |
References (not structured): Nagar, A. E., Huys, R., & Bishop, J. D. (2010). Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquat Inv, 5(2), 1-5. Collin, S. B., Oakley, J. A., Sewell, J., & Bishop, J. D. (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: It lives attached on substrate; embryos are retained and not released until complete settlement. Free-living larval stage only for a few minutes. |
Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Self-fertilization Sexual References: Collin, S. B., Oakley, J. A., Sewell, J., & Bishop, J. D. (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. Nagar, A. E., Huys, R., & Bishop, J. D. (2010). Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquat Inv, 5(2), 1-5. Comments: Reproduction by self-fertilization seems common in this species, although cross-fertilization also occurs. (Collin et al 2010) Ovyduct and sperm ducts are unusually shorts (Nagar et al 2010) |
Developmental trait (?) | Brooding References: Nagar, A. E., Huys, R., & Bishop, J. D. (2010). Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquat Inv, 5(2), 1-5. Comments: the embryos are brooded far from the exhalant siphon |
Characteristic feeding method / Life stage (?) |
References (not structured): Nagar, A. E., Huys, R., & Bishop, J. D. (2010). Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquat Inv, 5(2), 1-5. Kowalke, J. (1999). Filtration in antarctic ascidians–striking a balance. Journal of experimental marine biology and ecology, 242(2), 233-244. Comments: Diet mainly based on protozoans and bacteria |
Mobility / Life stage (?) |
References (not structured): Nagar, A. E., Huys, R., & Bishop, J. D. (2010). Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquat Inv, 5(2), 1-5. Collin, S. B., Oakley, J. A., Sewell, J., & Bishop, J. D. (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: free-living larval stage only for a few minutes |
Salinity tolerance range (?) | Venice system: 7. Euhaline [30-40psu] |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Nagar, A. E., Huys, R., & Bishop, J. D. (2010). Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquat Inv, 5(2), 1-5. Comments: may outcompete with the native ascidiella aspersa, but more observations are needed to observe the effects of the alien |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown |
Known human health impact? | Not known |
Known economic impact? | Known Comments: Has not had a significant economic or ecological impact. |
Known measurable environmental impact? | Known References: El Nagar, A., Huys, R., Bishop, J. D. 2010. Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquatic Invasions, 5(2), pp. 169-173. Comments: The species was very abundant on some structures built less than two years before the surveys, indicating a capacity for very rapid colonization and population increase. This suggests that the species is a potential threat to biodiversity and aquaculture interests. |
Included in the Target Species list? | No References: HELCOM, 2009. Alien Species and Ballast Water [PDF]. Available at: (https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf) |
Association with vessel vectors (?) | Biofouling References: Nagar, A. E., Huys, R., & Bishop, J. D. (2010). Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquat Inv, 5(2), 1-5. Comments: biofouling on submerged material and mussels |
Last update by | Sandra Gečaitė, 2024-07-10 |