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AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
| Species | Oncorhynchus mykiss [WoRMS] | |
| Authority | (Walbaum, 1792) | |
| Family | Salmonidae | |
| Order | Salmoniformes | |
| Class | Teleostei | |
| Phylum | Chordata | |
| Synonym (?) | Fario gairdneri (Richardson, 1836) Oncorhynchus gairdnerii (Richardson, 1836) Oncorhynchus kamloops (Jordan, 1892) Oncorhynchus mykiss nelsoni (Evermann, 1908) Parasalmo mykiss (Walbaum, 1792) |
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| Sub-species level (?) | Not entered |
| Native origin (?) | Not entered Comments: NW America North-east pacific N America Oncorhynchus mykiss is native to Armenia, Canada, Mexico, Russia and the USA. It has been introduced throughout the world. |
| Life form / Life stage (?) |
Comments: Rainbow trout is an anadromous, cool- to cold-water fish species. |
| Sociability / Life stage (?) |
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| Reproductive frequency (?) | Iteroparous Comments: Similar to Atlantic salmon, but unlike their Pacific Oncorhynchus salmonid kin, steelhead are iteroparous (able to spawn several times, each time separated by months) and make several spawning trips between fresh and salt water. |
| Reproductive type (?) | Sexual References: Kottelat M, Freyhof F (2007) Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646p |
| Developmental trait (?) | Spawning References: Kottelat M, Freyhof F (2007) Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646p Comments: Undertakes short spawning migrations. Anadromous and lake forms may migrate long distances to spawning streams. Eggs are laid in shallow nests dug out by the female in gravel riffles. The eggs require continuous oxygenation. At temperatures of about 55°F, the eggs will hatch approximately 21 days after they are laid. |
| Characteristic feeding method / Life stage (?) |
References (not structured): Kottelat M, Freyhof F (2007) Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646p Comments: Feeds on a variety of aquatic and terrestrial invertebrates and small fishes. |
| Mobility / Life stage (?) |
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| Salinity tolerance range (?) | Venice system: 1. Limnetic [<0.5psu] References: Weidema IR (2000) Introduced species in the nordic countries, Nord, 13 : 242pp |
| Habitat modifying ability potential (?) | Autogenic ecosystem engineers |
| Toxicity / Life stage (?) | Not relevant |
| Bioaccumulation association (?) | Anthropogenic chemical compounds References: Varol, M., Kaya, G. K., Alp, A. 2017. Heavy metal and arsenic concentrations in rainbow trout (Oncorhynchus mykiss) farmed in a dam reservoir on the Firat (Euphrates) River: Risk-based consumption advisories. Science of the Total Environment, 599, pp. 1288-1296. |
| Known human health impact? | Known References: Dizman, S., Görür, F. K., Keser, R. 2017. Assessment of human health risk from heavy metals levels in water and tissues of two trout species (Oncorhynchus mykiss and Salmo coruhensis) from the Fırtına and Güneysu Rivers in Turkey. Toxin Reviews, 36(4), pp. 306-312. Comments: Human health risks were evaluated from consumption of heavy metal contaminated fish. |
| Known economic impact? | Known References: D’Agaro, E., Gibertoni, P., Esposito, S. 2022. Recent trends and economic aspects in the rainbow trout (Oncorhynchus mykiss) sector. Applied Sciences, 12(17), 8773. Comments: The production of rainbow trout contributes approximately 25.5% of the total value and 69.9% of the volume of farmed fish. Over the past ten years, trout production has increased by 8.5% overall with an average annual growth rate of 2.5%. |
| Known measurable environmental impact? | Known References: Fuller, P. 2011. Oncorhynchus mykiss (USGS Nonindigenous Aquatic Species Database). Gainesville, Florida, USA: USG Comments: Stocking of hatchery O. mykiss in rivers has led to introduction of whirling disease (Myxobolus cerebralis) into open waters, to the severe detriment of indigenous species. O. mykiss have been found to negatively affect indigenous fish species through predation, competition for food and habitat, and displacement. |
| 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 |
| Last update by | Sandra Gečaitė, 2024-07-18 |