AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Megabalanus tintinnabulum [WoRMS] | |
Authority | (Linnaeus, 1758) | |
Family | Balanidae | |
Order | Sessilia | |
Class | Hexanauplia | |
Phylum | Arthropoda | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: sub-tropical cosmopolitan tropics |
Life form / Life stage (?) |
References (not structured): Thiyagarajan, V., Venugopalan, V. P., Subramoniam, T., Nair, K. V. K. 1997. Description of the naupliar stages of Megabalanus tintinnabulum (Cirripedia: Balanidae). Journal of Crustacean Biology, 17(2), pp. 332-342. |
Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Ali, S. N., Ayub, Z. 2021. Growth and reproduction of Megabalanus tintinnabulum (Crustacea: Cirripedia) in coastal waters of Pakistan, North Arabian Sea. Regional Studies in Marine Science, 43, 101662. |
Developmental trait (?) | Spawning References: Thiyagarajan, V., Venugopalan, V. P., Subramoniam, T., Nair, K. V. K. 1997. Description of the naupliar stages of Megabalanus tintinnabulum (Cirripedia: Balanidae). Journal of Crustacean Biology, 17(2), pp. 332-342. Comments: Eggs of M. tintinnabulum are fertilized internally by sperm from another barnacle nearby and start to develop into larvae within a few days. These are planktonic and disperse in the water column. They pass through six naupliar stages and one cypris larval stage before settling on the seabed, undergoing metamorphosis and developing into juveniles. These cement themselves to the substrate and remain sessile for the rest of their lives. |
Characteristic feeding method / Life stage (?) |
Comments: Like other acorn barnacles, M. tintinnabulum is a filter feeder. Specially adapted legs called cirri are extended through the opening at the top of the shell and are waved about at right angles to the flow of water past the shell. Food particles are caught by these, and the cirri are periodically withdrawn into the shell and the food scraped off. |
Mobility / Life stage (?) |
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Salinity tolerance range (?) | Unknown Comments: Not available. |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers Comments: M. tintinnabulum is found at or below the low-tide mark in the littoral zone and is part of the fouling community. It is found on the hulls of ships and on man-made structures in ports. It has a stable population structure and low mortality rate, and is a long-lived species. |
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 (?) | Ballast waters Biofouling References: Gollasch S, Macdonald E, Belson S, Botnen H, Christensen JT, Hamer JP, Houvenaghel G, Jelmert A, Lucas I, Masson D, McCollin T, Olenin S, Persson A, Wallentinus I, Wetsteyn LPMJ, Wittling T (2002) Life in Ballast Tanks In: Invasive aquatic species of Europe - distribution, impact and management. Leppäkoski, E., S. Gollasch & S. Olenin (eds). Kluwer Academic Publishers: 217-231 http://www.corpi.ku.lt/nemo/aqua_app_gollasch.pdf Pfaff, M. C., Biccard, A., Mvula, P. E., Olbers, J., Mushanganyisi, K., Macdonald, A., Samaai, T. 2022. Giants and titans: first records of the invasive acorn barnacles Megabalanus tintinnabulum (Linnaeus, 1758) and Megabalanus coccopoma (Darwin, 1854) on intertidal rocky shores of South Africa. BioInvasions Record, 11(3). |
Last update by | Sandra Gečaitė, 2024-08-13 |