AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Victorella pavida [WoRMS] | |
Authority | Saville-Kent, 1870 | |
Family | Victorellidae | |
Order | Ctenostomatida | |
Class | Gymnolaemata | |
Phylum | Bryozoa | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Country: India References (not structured): Carlton J.T., 1979 – History, biogeography, and ecology of the introduced marine and estuarine invertebrates of the Pacific coast of North America, PhD dissertation, University of California Davis Cohen A.N. & Carlton J.T., 1995 – Nonindigenous Aquatic Species in a United States Estuary: A Case Study of the Biological Invasion of the San Francisco Bay and Delta. A Report for the United States Fish and Wildlife Service, Washington, D.C. and The National Sea Grant College Program Connecticut Sea Grant Program. 272 pp. Leppakoski E, Olenin S (2000) Non-native species and rates of spread: lessons from the brackish Baltic Sea. Biological Invasions, 2: 151-163 Comments: Reviewing its global distribution, Carlton (1979) suggested that it was native to the Indian Ocean and introduced via hull fouling to Europe, eastern North America, Japan and eastern South America (Carlton 1979, Cohen & Carlton, 1995). |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
References (not structured): Carter, M. C. & Jackson A., 2007 – Basic information for Victorella pavida (Trembling sea mat) – Marine Life Information Network for Britain & Ireland. Marine Biological Association. Retrieved 2008-06-24 Carter MC, Bishop, JDD, Evans NJ, Wood A (2010) Environmental influences on the formation and germination of hibernacula in the brackish-water bryozoan Victorella pavida Saville Kent, 1870 (Ctenostomata: Victorellidae). Journal of Experimental Marine Biology and Ecology Volume 383, Issue 2, 15 Pages 89-95. Comments: Colonies may consist of dense clumps or chains of zooids. Individual zooids up to 1 mm in size. Attached zooids posses a cylindrical base with a tubular extension (peristome).Eight tentacles. The sphincter is situated at the base of the gut. Gizzard absent. Produces dark brown/black hibernacula (dormant resting buds)(Carter & Jackson 2007). https://www.bryozoans.nl/pictures/en/victorella_pavida.html |
Reproductive frequency (?) | Iteroparous References (not structured): Carter M, Angus J (2007) Victorella pavida. Trembling sea mat. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. Accesed 29 November 2011. Available from: <http://www.marlin.ac.uk/reproduction.php?speciesID=4576> |
Reproductive type (?) | Asexual Self-fertilization Sexual References: Carter, M. C., 2004 - The biology and genetic diversity of the trembling sea mat Victorella pavida (Bryozoa: Ctenostomata) from Swanpool, Falmouth - M.Res Thesis, University of Plymouth. Carter, M. C. & Jackson A., 2007 – Basic information for Victorella pavida (Trembling sea mat) – Marine Life Information Network for Britain & Ireland. Marine Biological Association. Retrieved 2008-06-24 Carter MC, Bishop JDD, Evans NJ, Wood A (2010) Environmental influences on the formation and germination of hibernacula in the brackish-water bryozoan Victorella pavida Saville Kent, 1870 (Ctenostomata: Victorellidae). Journal of Experimental Marine Biology and Ecology Volume 383, Issue 2, 15. Pages 89-95 Comments: Protandrous hermaphrodite (M. Carter & A.Jackson, 2007). New colonies emerge from dormancy during the spring and when temperatures are approximately 13°C.Embryos released through special intertentacular organ. By November and the onset of winter, zooids begin to degenerate and eventually only the asexually produced dormant resting bodies (hibernacula) remain. The hibernacula germinate again in the spring and the cycle begins again (Carter, 2004). |
Developmental trait (?) | Brooding Lecithotrophy Resting stages References: Carter, M. C. & Jackson A., 2007 – Basic information for Victorella pavida (Trembling sea mat) – Marine Life Information Network for Britain & Ireland. Marine Biological Association. Retrieved 2008-06-24 |
Characteristic feeding method / Life stage (?) |
References (not structured): Poirrier MA, Mulino M (1977) Effects of environmental factors on the distribution and morphology of Victorella pavida (Ectoprocta) in Lake Pontchartrain, Louisiana, and vicinity. Chesapeake Sci. 18: 347-352 Ravindranatha Menon N, Balakrishnan Nair N (1972) On the nature of tolerance to salinity in two euryhaline intertidal bryozoans Victorella pavida Kent and Electra crustulenta Pallas. Proc. Indian Natl. Sci. Acad., Part B. Vol. 38: 414-429 |
Mobility / Life stage (?) |
References (not structured): Carter MC, Bishop JDD, Evans NJ, Wood A (2010) Environmental influences on the formation and germination of hibernacula in the brackish-water bryozoan Victorella pavida Saville Kent, 1870 (Ctenostomata: Victorellidae). Journal of Experimental Marine Biology and Ecology Volume 383, Issue 2, 15. Pages 89-95 Carter M, Angus J (2007). Victorella pavida. Trembling sea mat. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. Accesed 29 November 2011. Available from: <http://www.marlin.ac.uk/generalbiology.php?speciesID=4576> Comments: Grows in shallow water on submerged stones, plants and wood as well as artificial substrata such as concrete. |
Salinity tolerance range (?) | Exact range: 1 - 35 References: Occhipinti-Ambrogi A (1981) Briozoi Lagunari. Guide per il riconoscimento delle specie animali delle acque lagunari e costiere italiane, AQ/1/126. CNR. Comments: The preferred salinity range is 2-10 |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers Comments: Found in areas of low and fluctuating salinity such as estuaries and lagoons. The trembling sea mat grows in shallow water on submerged stones, plants and wood as well as artificial substrata such as concrete. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Known References: Rao, K. S., Balaji, M. 1988. Biological fouling at port Kakinada, Godavari estuary, India. Comments: V. pavida is an important fouling organism on power plants and other industrial equipment in estuarine waters. |
Known measurable environmental impact? | Known References: Poirrier, M. A., Mulino, M. M. 1977. Effects of environmental factors on the distribution and morphology of Victorella pavida (Ectoprocta) in Lake Pontchartrain, Louisiana, and vicinity. Chesapeake Science, 18(4), pp. 347-352. Comments: V. pavida is presumed to compete for space in mesohaline fouling communities with the introduced hydroids Cordylophora caspia and Garveia franciscana, which are also frequently dominant in fouling communities. Colonies provide habitat for a wide variety of small motile animals (amphipods, polychaetes). |
Included in the Target Species list? | Yes 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: Wasson K, Holle B, Toft J, Ruiz G(2000) Detecting invasions of marine organisms: kamptozoan case histories. Kluwer Academic Publishers. Printed in the Netherlands. Biological Invasions 2: 59–74 Comments: This cosmopolitan bryozoan has been reported from the bottoms of vessels. |
Molecular information | Available BOLD (http://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?searchMenu=taxonomy&query=Victorella+pavida&taxon=Victorella+pavida) |
Last update by | Sandra Gečaitė, 2024-08-21 |