Oncorhynchus mykiss (Walbaum, 1792)

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English Rainbow trout ISEIA: C2
Lëtzebuergesch Reeboufrell 1 EASIN
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Report the species

Report Oncorhynchus mykiss to the National Museum of Natural History.

Status and distribution in Luxembourg

Distribution map of Oncorhynchus mykiss Walbaum, 1792 in Luxembourg. Data source: Recorder-Lux, iNaturalist & GBIF, 2020-01-27.

Oncorhynchus mykiss (Walbaum, 1792) (Syn: Trutta iridea (Gibbons, 1855)) was introduced to Luxembourg in 1887: “On 2 July 1887 Mr. Koltz introduced the ‘rainbow trout’ (Trutta iridea) to us and released it in the Canacherbach (Anonym 1892; Feltgen 1902). 2

During the river inventory of 1996/1997 the Rainbow trout was found in 33 spots. During a similar inventory in 2005, the species was only documented in two rivers: the Lower Syre (3 individuals) and the Reierbaach in the vicinity of Lasauvage (49 indivduals). The latter population indicates natural reproduction in the Reierbaach, which happens rarely in Europe (Administration de la gestion de l’eau 2010).

The introduction of the Rainbow trout was reduced considerably with, for example, a total ban in border rivers since 1986 (Administration de la gestion de l’eau 2010), resulting in the decline of the species in Luxembourg.

Risk assessment

ISEIA protocol: C2 (1+2+1+1) (Ries et al. 2014: 199).


  • Administration de la gestion de l’eau (2010): Les poissons au Luxembourg, Cartographie des poissons, lamproies et écrevisses du grand-duché de Luxembourg. 213 pp.
  • Anonym, 1892. Sitzung vom 8. Februar 1892. Bull. Soc. Nat. luxemb. 2, H. 1: 3. [eluxemburgensia]
  • Feltgen, E., 1902. Vademecum des Luxemburger Fischereiliebhabers. P. Worré-Mertens, Luxemburg. 148 S.
  • Klees, H., 1981. Luxemburger Tiernamen. Beiträge zur luxemburgischen Sprach- und Volkskunde XIV. Institut grand-ducal, Section de linguistique, de folklore et de toponymie. 2. Aufl. 131 S. Imprimerie Pierre Linden, Luxembourg.
  • Ries, C., M. Pfeiffenschneider, Engel, E., J.-C. Heidt & M. Lauff, 2014. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of vertebrates in Luxembourg. Bull. Soc. Nat. luxemb. 115: 195-201. [PDF 247 KB]

 Page content last updated on 2019-11-28. Last proofread by Caroline Grounds on 2019-11-28.