AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Ascidiella scabra [WoRMS] | |
Authority | (Müller, 1776) | |
Family | Ascidiidae | |
Order | Phlebobranchia | |
Class | Ascidiacea | |
Phylum | Chordata | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Ocean: Atlantic --> Ocean region: NE Atlantic References (not structured): Berrill NJ. 1950. The Tunicata with an account of the British species. London, UK: Ray society, 349 pp. Millar RH. 1966. Tunicata Ascidiacea Marine Invertebrates of Scandinavia no 1. Oslo, Norway: Scandinavia University Books, pp. 1–123 Lützen JG. 1967. Seekdyr Danm Fauna. 75:1–267. Dybern BI. 1969. Distribution and ecology of the tunicate Ascidiella scabra (Müller) in the Skagerak-Kattegat area. Ophelia. 6:183–201. doi:10.1080/00785326.1969.10409648 Nishikawa T, Oohara I, Saitoh K, Shigenobu Y, Hasegawa N, Kanamori M, Baba K, Turon X, Bishop JDD. 2014. Molecular and morphological discrimination between an invasive ascidian, Ascidiella aspersa, and its congener A. scabra (Urochordata: Ascidiacea). Zoological Science. 31(3):180–185. doi:10.2108/zsj.31.180 |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
References (not structured): Hiscock, K. 2006. Ascidiella scabra A sea squirt. In Tyler-Walters H. Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 02-08-2024]. Available from: https://www.marlin.ac.uk/species/detail/1823 Comments: A. scabra is a small solitary ascidian (usually <4cm long) with an ovate body and anterior siphons separated by a distance about one quarter the body length. The test is semi-transparent and usually tinged red. |
Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: De-Bastos, E. , Tyler-Walters, H., 2016. [Aphelochaeta] spp. and [Polydora] spp. in variable salinity infralittoral mixed sediment. In Tyler-Walters H. and Hiscock K. (eds) Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. Comments: A. scabra has external fertilization but short lived larvae (swimming for only a few hours), so that dispersal is probably limited. |
Developmental trait (?) | Spawning Comments: Ascidiella scabra has a high fecundity and settles readily, probably for an extended period from spring to autumn. Eggs and larvae are free-living for only a few hours and so recolonization would have to be from existing individuals no more than a few km away. |
Characteristic feeding method / Life stage (?) |
References (not structured): Hiscock, K. 2006. Ascidiella scabra A sea squirt. In Tyler-Walters H. Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 02-08-2024]. Available from: https://www.marlin.ac.uk/species/detail/1823 Comments: Suspended particles including phytoplankton |
Mobility / Life stage (?) |
References (not structured): Picton, B.E. Morrow, C.C. 2016. Ascidiella scabra (O F Müller, 1776). [In] Encyclopedia of Marine Life of Britain and Ireland. Comments: Habitat: Usually in sheltered places with some current. Often attached to other ascidians, bryozoans or algae. Lower shore to 300 m. |
Salinity tolerance range (?) | Exact range: 18 - 40 References: Giménez, D. R., Taverna, A., Meloni, M., Correa, N., Sylvester, F., Tatián, M. 2021. A new record of Ascidiella scabra (Müller, 1776)(Ascidiacea, Phlebobranchia) in the southwestern Atlantic. Check List, 17(3), pp. 723-728. Comments: Full (30-40 psu), Variable (18-40 psu) |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Giménez, D. R., Taverna, A., Meloni, M., Correa, N., Sylvester, F., Tatián, M. 2021. A new record of Ascidiella scabra (Müller, 1776)(Ascidiacea, Phlebobranchia) in the southwestern Atlantic. Check List, 17(3), pp. 723-728. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Known Comments: Harmless. |
Known economic impact? | Not known Comments: Not available. |
Known measurable environmental impact? | Not known Comments: Not available. |
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 [Accessed 1 July 2024]. |
Association with vessel vectors (?) | Biofouling References: Giménez, D. R., Taverna, A., Meloni, M., Correa, N., Sylvester, F., Tatián, M. 2021. A new record of Ascidiella scabra (Müller, 1776)(Ascidiacea, Phlebobranchia) in the southwestern Atlantic. Check List, 17(3), pp. 723-728. |
Created by | Aleksas Narščius, 2019-05-23 |
Last update by | Sandra Gečaitė, 2024-08-02 |