AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Polydora websteri [WoRMS] | |
Authority | Hartman in Loosanoff & Engle, 1943 | |
Family | Spionidae | |
Order | Spionida | |
Class | Polychaeta | |
Phylum | Annelida | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: Asia |
Life form / Life stage (?) |
References (not structured): Read, G. B. 2010. Comparison and history of Polydora websteri and P. haswelli (Polychaeta: Spionidae) as mud-blister worms in New Zealand shellfish. New Zealand Journal of Marine and Freshwater Research, 44(2), pp. 83-100. Comments: Known from bivalve mollusc shells, in debris-packed blisters on valve interior surface; colonisation by shell lip ingress, or less commonly by external through-shell borings. |
Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Read, G. B. 2010. Comparison and history of Polydora websteri and P. haswelli (Polychaeta: Spionidae) as mud-blister worms in New Zealand shellfish. New Zealand Journal of Marine and Freshwater Research, 44(2), pp. 83-100. |
Developmental trait (?) | Brooding References: Read, G. B. 2010. Comparison and history of Polydora websteri and P. haswelli (Polychaeta: Spionidae) as mud-blister worms in New Zealand shellfish. New Zealand Journal of Marine and Freshwater Research, 44(2), pp. 83-100. Comments: Egg masses with separate capsules, not fused into a string, without nurse eggs, with planktotrophic early released larvae. |
Characteristic feeding method / Life stage (?) |
References (not structured): Brown, S. W. 2012. Salinity tolerance of the oyster mudworm Polydora websteri. Comments: P. websteri is a suspension feeder and competes for food ith its host or if large mudblisters disrupt the host’s feeding currents. |
Mobility / Life stage (?) |
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Salinity tolerance range (?) | Venice system: 5. α-Mesohaline [10-18psu] 6. Polymixohaline [18-30psu] 7. Euhaline [30-40psu] References: Brown, S. W. 2012. Salinity tolerance of the oyster mudworm Polydora websteri. |
Habitat modifying ability potential (?) | Allogenic ecosystem engineers References: Read, G. B. 2010. Comparison and history of Polydora websteri and P. haswelli (Polychaeta: Spionidae) as mud-blister worms in New Zealand shellfish. New Zealand Journal of Marine and Freshwater Research, 44(2), pp. 83-100. |
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: Waser, A. M., Lackschewitz, D., Knol, J., Reise, K., Wegner, K. M., Thieltges, D. W. 2020. Spread of the invasive shell-boring annelid Polydora websteri (Polychaeta, Spionidae) into naturalised oyster reefs in the European Wadden Sea. Marine Biodiversity, 50(5), 63. Comments: Has a negative impact on economically important mollusc species that are cultured globally, such as C. gigas. |
Known measurable environmental impact? | Known References: Martinelli, J. C., Lopes, H. M., Hauser, L., Jimenez-Hidalgo, I., King, T. L., Padilla-Gamiño, J. L., ... Wood, C. L. 2020. Confirmation of the shell-boring oyster parasite Polydora websteri (Polychaeta: Spionidae) in Washington State, USA. Scientific reports, 10(1), 3961. Comments: Invasions by shell-boring polychaetes such as Polydora websteri Hartman have resulted in the collapse of oyster aquaculture industries in Australia, New Zealand, and Hawaii. |
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 (?) | Unknown References: Waser, A. M., Lackschewitz, D., Knol, J., Reise, K., Wegner, K. M., Thieltges, D. W. 2020. Spread of the invasive shell-boring annelid Polydora websteri (Polychaeta, Spionidae) into naturalised oyster reefs in the European Wadden Sea. Marine Biodiversity, 50(5), 63. Comments: The most parsimonious explanation of its introduction is via imports of Pacific oysters, as individuals of P. websteri concentrate in oysters in the vicinity of the oyster culture. |
Last update by | Sandra Gečaitė, 2024-07-23 |