AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Salvelinus namaycush [WoRMS] | |
Authority | (Walbaum, 1792) | |
Family | Salmonidae | |
Order | Salmoniformes | |
Class | Actinopterygii | |
Phylum | Chordata | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: North America |
Life form / Life stage (?) |
References (not structured): Fuller P (2011) Salvelinus namaycush. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=942 RevisionDate: Accesed 16 September 2011 Comments: Species inhabit almost benthic-like environments. Within the water column, S. namaycush is found at both deep and shallow depths depending on the location and time of year as well as stage of development. |
Sociability / Life stage (?) |
References (not structured): Fuller P (2011) Salvelinus namaycush. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=942 RevisionDate: Accesed 16 September 2011 |
Reproductive frequency (?) | Iteroparous References (not structured): Fuller P (2011) Salvelinus namaycush. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=942 RevisionDate: Accesed 16 September 2011 |
Reproductive type (?) | Sexual |
Developmental trait (?) | Spawning References: Fuller P (2011) Salvelinus namaycush. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=942 RevisionDate: Accesed 16 September 2011 Comments: Like many other aquatic species, Salvelinus namaycush fertilizes eggs externally, but unlike other species do not construct a 'redd' or nest. The act of spawning occurs predominately at night; where males will approach a female, press against her sides and quiver. During this act the females' eggs fall into rocky outcroppings beneath her after being fertilized by the male. This act of courting is repeated until all the eggs of the female are released. Occasionally, up to seven males and three females may interact together in a single spawning act. |
Characteristic feeding method / Life stage (?) |
References (not structured): Fuller P (2011) Salvelinus namaycush. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=942 RevisionDate: Accesed 16 September 2011 Comments: Feeding on organisms from freshwater sponges to plankton, Salvelinus namaycush predates on a variety of underwater life. Organisms such as crustaceans, insects, fish and even small mammals are part of the diet of S. namaycush. When in the juvenile state, S. namaycush feeds almost exclusively on invertebrates. |
Mobility / Life stage (?) |
References (not structured): Fuller P (2011) Salvelinus namaycush. USGS Nonindigenous Aquatic Species Database, Gainesville, FL. http://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=942 RevisionDate: Accesed 16 September 2011 |
Salinity tolerance range (?) | Exact range: 0 - 13 Comments: Their salinity tolerance is usually close to 11-13 ppt. |
Habitat modifying ability potential (?) | Keystone species References: Giroux, T. M. 2008. Assessing genetic diversity of lake trout (Salvelinus namaycush) populations in Saskatchewan (Doctoral dissertation, University of Saskatchewan). Comments: The lake trout is a keystone species in ecosystems of northern temperate lakes and these declines may subsequently reduce the genetic diversity found in these salmonids. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Anthropogenic chemical compounds References: Bowlby, J. N., Gunn, J. M., Liimatainen, V. A. 1988. Metals in stocked lake trout (Salvelinus namaycush) in lakes near Sudbury, Canada. Water, Air, and Soil Pollution, 39, pp. 217-230. |
Known human health impact? | Known References: Bartz, K. K., Hannam, M. P., Wilson, T. L., Lepak, R. F., Ogorek, J. M., Young, D. B., ... Krabbenhoft, D. P. 2023. Understanding drivers of mercury in lake trout (Salvelinus namaycush), a top-predator fish in southwest Alaska's parklands. Environmental Pollution, 330, 121678. Comments: Hg concentrations from lakes in five Alaskan parks were among the highest of the 23 western parks measured and exceeded both ecological and human health impairment benchmarks. Although once an important commercial fish stock, lake trout levels in the Great Lakes dropped sharply during the 1950's. Lake trout are still highly valued as a sport fish and anglers who seek this species contribute to the regional economy of areas with fishable populations through the purchase of fishing licenses. |
Known economic impact? | Known References: Noakes, D. J. 2014. Overview of salmon and their ecological and economic importance. Salmon. Biology, Ecological Impacts and Economic Importance. NOVA Publishers, New York, 1. Comments: Lake trout are still highly valued as a sport fish and anglers who seek this species contribute to the regional economy of areas with fishable populations. |
Known measurable environmental impact? | Known References: Eloranta, A. P., Nieminen, P., Kahilainen, K. K. 2015. Trophic interactions between introduced lake trout (Salvelinus namaycush) and native Arctic charr (S. alpinus) in a large Fennoscandian subarctic lake. Ecology of Freshwater Fish, 24(2), pp. 181-192. Comments: Introduced lake trout may to some extent compete with and prey upon native Arctic charr, but currently have only a minor if any impact on native fishes and food web structure in Inarijärvi. |
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 Comments: Not available. |
Last update by | Sandra Gečaitė, 2024-07-23 |