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AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
| Species | Mytilicola intestinalis [WoRMS] | |
| Authority | Steuer, 1902 | |
| Family | Mytilicolidae | |
| Order | Cyclopoida | |
| Class | Copepoda | |
| Phylum | Arthropoda | |
| Synonym (?) | ||
| Sub-species level (?) | Not entered |
| Native origin (?) | Not entered Comments: Mediterranean Sea: this parasite was first described in mussels (Mytilus galloprovincialis) from the Gulf of Trieste, Adriatic Sea (Steuer, 1902; 1905) |
| Life form / Life stage (?) |
References (not structured): CABI Invasive Species Compendium (http://www.cabi.org/isc/datasheet/73758) Campbell, S.A. 1970. The occurrence and effects of Mytilicola intestinalis in Mytilus edulis. Marine Biology 5: 89-95 Comments: Mytilicola intestinalis is a parasitic copepod that occurs in the intestinal tract of various species of bivalves. Copepodite I is only free swimming for 3-4 days after which it moves to the bottom to search for a host |
| Sociability / Life stage (?) |
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| Reproductive frequency (?) | Iteroparous References (not structured): Williams, C. S. 1969. The Life History of Mytilicola Intestinalis Steuer1. ICES Journal of Marine Science, 32(3), pp. 419-429. Comments: M. intestinalis will be able to breed several times during the year, and the breeding population will become 'out of phase', with no apparent cycles of infection. |
| Reproductive type (?) | Sexual References: Hockley, A. R. 1951. On the biology of Mytilicola intestinalis (Steuer). Journal of the Marine Biological Association of the United Kingdom, 30(2), pp. 223-232. Comments: Only sexual reproduction can occur, and it involves the presence of the two sexes in one host. Mytilicola reached sexual maturity in seven weeks. |
| Developmental trait (?) | Brooding References: Hockley, A. R. 1951. On the biology of Mytilicola intestinalis (Steuer). Journal of the Marine Biological Association of the United Kingdom, 30(2), pp. 223-232. Comments: Genital openings paired, female carrying two long, narrow egg-sacs, in which eggs are arranged with some regularity.Females may be found with the eggs in various stages of development, but they are seldom found with eggs ready to hatch. Parasites removed from the host may retain the egg-sacs even after all the eggs have hatched, but they are easily detached at any stage. |
| Characteristic feeding method / Life stage (?) |
References (not structured): Williams, C. S. 1969. The Life History of Mytilicola Intestinalis Steuer1. ICES Journal of Marine Science, 32(3), pp. 419-429. Comments: Parasite. |
| Mobility / Life stage (?) |
References (not structured): Hockley, A. R. 1951. On the biology of Mytilicola intestinalis (Steuer). Journal of the Marine Biological Association of the United Kingdom, 30(2), pp. 223-232. Comments: Females have two external egg pockets that are attached to the back of their body and are also coloured red. |
| Salinity tolerance range (?) | Exact range: 5 - 34 References: Bolster G.C., 1954. The biology and dispersal of Myticola intestinalis Steuer, a copepod parasite of mussels. Fishery investigations, Serries II, 18(6), 3-30 Comments: Minimum salinity in which it can survive is 5 ppt. Hatching of copepodits - at temperatures from 6 to 19, with salinities from 17,2 to 30,8. |
| Habitat modifying ability potential (?) | Unknown Comments: Not available. |
| Toxicity / Life stage (?) | Not relevant |
| Bioaccumulation association (?) | Unknown Comments: Not available. |
| Known human health impact? | Known References: Borkens, Y., Koppe, P. 2022. Mytilicola orientalis. Aquaculture international : journal of the European Aquaculture Society, 30(6), pp. 2741–2749. Comments: Because Mytilicola spp. infect bivalves, the parasites pose no threat to humans. They simply cannot become infected with Mytilicola. Consumption of infested mussels is safe. The danger posed by Mytilicola to humans is therefore purely of an economic nature. |
| Known economic impact? | Known References: Borkens, Y., Koppe, P. 2022. Mytilicola orientalis. Aquaculture international : journal of the European Aquaculture Society, 30(6), pp. 2741–2749. Comments: Fisheries: Parasitism by Mytilicola orientalis rarely kills oysters, but can lower their condition factor (increased water and decreased fat content), affecting the perceived quality of the oysters, |
| Known measurable environmental impact? | Known References: Grizel, H. 1985. Mytilicola orientalis Mori, parasitism, ICES Identification Sheets for diseases and parasites [Fishes, Crustaceans, Mollusks) 20, pp. 1-4. Comments: Parasitism: Infection by Mytilicola orientalis appears to rarely result in mortality of oysters, but tissue damage to intestinal tissue and scar formation can reduce the efficiency of digestion, and contributes to decreased condtion factor |
| 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: Feis, M. E., Goedknegt, M. A., Arzul, I., Chenuil, A., Boon, O. D., Gottschalck, L., ... Luttikhuizen, P. C. 2019. Global invasion genetics of two parasitic copepods infecting marine bivalves. Scientific Reports, 9(1), 12730. Comments: M. orientalis invasion history resembles the genetic structure and recent spread of its principal host, the Pacific oyster. In infected bivalve hosts attached to ship/boat hull. |
| Last update by | Sandra Gečaitė, 2024-07-17 |