Silver trout

The name "silver trout" is also sometimes used for rainbow trout.

Silver trout
Salvelinus agassizi
Conservation status
Extinct  (1960s[citation needed]) (IUCN 2.3)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Salmoniformes
Family:	Salmonidae
Genus:	Salvelinus
Species:	S. agassizi
Binomial name
Salvelinus agassizi (Garman, 1885)

The silver trout (Salvelinus agassizi) is an extinct trout species last seen in Dublin Pond, New Hampshire, in 1930, in a catch of six. The only properly confirmed occurrence of the fish was also in Dublin Pond.

The silver trout was often a foot long and was said to actually be olive green in colour. It was an exceedingly rare fish, having become trapped (by changed drainage systems) in three New Hampshire lakes (Dublin Pond, Sunapee Lake, and Christine Lake in Stark) that were left as isolated pockets by a retreating glacial front approximately 8,000 years before, following the end of the last Ice Age. In the deep waters of these lakes, cut off from other species, the silver trout had no natural predators.^{[citation needed]}

However, by the late 19th century, as each area developed its own steady summer tourism, recreational fishermen who sought to increase their catches began to introduce new fish species into these lakes, and these eventually overwhelmed the native silver trout. Yellow perch, which eat trout eggs, were particularly devastating. Very small numbers of silver trout may have survived into the 1950s and 1960s, but they are extinct today.^{[citation needed]}

References

• World Conservation Monitoring Centre (1996). Salvelinus agassizi. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 10 May 2006.
• Froese, Rainer, and Daniel Pauly, eds. (2005). "Salvelinus agassizi" in FishBase. 10 2005 version.