AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Faxonius virilis [WoRMS] | |
Authority | (Hagen, 1870) | |
Family | Cambaridae | |
Order | Decapoda | |
Class | Malacostraca | |
Phylum | Arthropoda | |
Synonym (?) | Orconectes virilis | |
Sub-species level (?) | Not entered |
Native origin (?) | Country: Canada Country: USA References (not structured): Rozansky, Z., Larson, E. R., Taylor, C. A. 2021. Invasive virile crayfish (Faxonius virilis Hagen, 1870) hybridizes with native spothanded crayfish (Faxonius punctimanus Creaser, 1933) in the Current River watershed of Missouri, US. Aquatic Invasions, 16(4), pp. 690–709. Comments: It is native to the central United States, east to tributaries of Lake Erie, Lake Ontario, Lake Champlain and the St. Lawrence River in New York and to much of Canada. |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
Comments: Faxonius virilis tends to be solitary but can maintain high population densities. |
Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Nemesis. (2023). Faxonius virilis, Crustaceans-Crayfish: virile crayfish. Edgewater, MD: National Estuarine and Marine Exotic Species Information System (NEMESIS), Smithsonian Environmental Research Center. Available at: https://invasions.si.edu/nemesis/species_summary/97425 [Accessed 15 July 2024]. Comments: Faxonius virilis alternates between a sexually mature form (Form I) during the mating season and asexually immature form (Form II) outside of the mating season.Fertilization is delayed, with females storing the sperm to fertilize their eggs in the spring. Eggs are attached under the tail to swimmerets in a large ball resembling a raspberry. Larval development takes place inside the egg and the young hatch 1-2 months after being laid. Young hatchlings look like miniature adults and can probably grow to about 2-3 cm long by the fall. |
Developmental trait (?) | Brooding |
Characteristic feeding method / Life stage (?) |
Comments: F. virilis feeds on a wide range of plants and invertebrates, as well as tadpoles and even small fish. |
Mobility / Life stage (?) |
Comments: F. virilis does not burrow, but may tunnel. |
Salinity tolerance range (?) | Exact range: 0 - 14 Comments: F. virilis is a freshwater crayfish that can tolerate brackish water salinities up to at least 14 PSU. |
Habitat modifying ability potential (?) | Unknown |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Anthropogenic chemical compounds References: Ikem, A., Ayodeji, O. J., Wetzel, J. 2021. Human health risk assessment of selected metal (loid) s via crayfish (Faxonius virilis; Procambarus acutus acutus) consumption in Missouri. Heliyon, 7(6). Comments: As microbenthic organisms, crayfish species are in constant contact with bottom sediments (detritus). Consequently, they accumulate metals in their habitat through food ingestion, absorption, and ion exchange across the membrane. |
Known human health impact? | Known References: Ikem, A., Ayodeji, O. J., Wetzel, J. 2021. Human health risk assessment of selected metal (loid) s via crayfish (Faxonius virilis; Procambarus acutus acutus) consumption in Missouri. Heliyon, 7(6). Comments: High metals/metalloid exposure from crayfish muscle consumption posed potential health hazards to the adult population. |
Known economic impact? | Known References: Nemesis. (2023). Faxonius virilis, Crustaceans-Crayfish: virile crayfish. Edgewater, MD: National Estuarine and Marine Exotic Species Information System (NEMESIS), Smithsonian Environmental Research Center. Available at: https://invasions.si.edu/nemesis/species_summary/97425 [Accessed 15 July 2024]. Comments: Faxonius is commercially harvested within its native range by supply companies to be used in teaching and research; however, this is not considered of great economic importance. It is sold as food in parts of its range, but widely as live bait. |
Known measurable environmental impact? | Known References: Rogowski, D.L., Stockwell, C.A., 2006. Assessment of potential impacts of exotic species on populations of a threatened species, white sands pupfish, Cyprinodon tularosa. Biological Invasions, 8(1), pp. 79-87. Comments: F. virilis affects the reproduction and survival of the white sands pupfish, Cyprinodon tularosa. |
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: Soes, M., 2007. Orconectes virilis: a North American crayfish conquering The Netherlands. In: 15th International Conference on Aquatic Invasive Species (ICAIS), September 23 to 27, 2007, Nijmegen, The Netherlands [ed. by Anon.]. 85 pp. Comments: Trade through aquariums, use in aquaculture and intentional release. It has also escaped from laboratory ponds. The species is also introduced in Mexico and Europe. t is believed to be introduced to the Netherlands via the aquarium trade and only recently becoming established and widespread. |
Last update by | Sandra Gečaitė, 2024-07-15 |