Silver trout

The name "silver trout" is also sometimes used for rainbow trout.
Silver trout
Conservation status
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Actinopterygii
Order:Salmoniformes
Family:Salmonidae
Genus:Salvelinus
Species:S. agassizi
Binomial name
Salvelinus agassizi


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 color. 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.

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.

References

O. mykiss

Binomial name
Oncorhynchus mykiss
Walbaum, 1792

Subspecies
See text.
The rainbow trout (Oncorhynchus mykiss), also called the redband trout
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conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. Many factors are taken into account when assessing the conservation status of a species: not simply the number remaining, but the
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extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to breed and recover may have been lost before this point).
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19th century - 20th century - 21st century
1900s  1910s  1920s  - 1930s -  1940s  1950s  1960s
1927 1928 1929 - 1930 - 1931 1932 1933

Year 1930 (MCMXXX
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Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Chordata
Bateson, 1885

Typical Classes

See below

Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Actinopterygii
Klein, 1885

Subclasses

Chondrostei
Neopterygii
See text for orders.
The Actinopterygii (the plural form of Actinopterygius) comprise the class of the ray-finned fishes.
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Salmoniformes

Family: Salmonidae

Genera

(see text)

Salmonidae is a family of ray-finned fish, the only living family of the order Salmoniformes.
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Salmoniformes

Family: Salmonidae

Genera

(see text)

Salmonidae is a family of ray-finned fish, the only living family of the order Salmoniformes.
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Salvelinus

Species

(see text)


Salvelinus is a genus of salmonid fish, often called char or charr. Many fish called trout are members of this genus.
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binomial nomenclature is the formal system of naming species. The system is also called binominal nomenclature (particularly in zoological circles), binary nomenclature (particularly in botanical circles), or the binomial classification system.
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extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to breed and recover may have been lost before this point).
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Location Cheshire County, New Hampshire
Coordinates Coordinates:


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State of New Hampshire

Flag of New Hampshire Seal
Nickname(s): The Granite State
Motto(s): Live Free or Die

Official language(s) English

Capital Concord
Largest city Manchester
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19th century - 20th century - 21st century
1900s  1910s  1920s  - 1930s -  1940s  1950s  1960s
1927 1928 1929 - 1930 - 1931 1932 1933

Year 1930 (MCMXXX
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Dublin, New Hampshire

Seal
Location in Cheshire County, New Hampshire
Coordinates:
Country United States
State New Hampshire
County Cheshire
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Location Sullivan County and Grafton County, New Hampshire
Coordinates Coordinates:


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Location Coos County, New Hampshire
Coordinates Coordinates:

Primary sources
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Stark, New Hampshire
Location in Coos County, New Hampshire
Coordinates:
Country United States
State New Hampshire
County Coos
Incorporated 1795
Government
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glacier is a large, slow moving river of ice, formed from compacted layers of snow, that slowly deforms and flows in response to gravity. Glacier ice is the largest reservoir of fresh water on Earth, and second only to oceans as the largest reservoir of total water.
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ice age is a period of long-term reduction in the temperature of Earth's climate, resulting in an expansion of the continental ice sheets, polar ice sheets and mountain glaciers.
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The 19th Century (also written XIX century) lasted from 1801 through 1900 in the Gregorian calendar. It is often referred to as the "1800s.
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Fishing is the activity of hunting for fish by hooking, trapping, or gathering. By extension, the term fishing is applied to pursuing other aquatic animals such as various types of shellfish, squid, octopus, turtles, frogs, and some edible marine invertebrates.
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P. flavescens

Binomial name
Perca flavescens
Mitchill, 1814

The yellow perch (Perca flavescens
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ROE is:
  • an economics acronym meaning "Return On Equity."
  • the Royal Observatory, Edinburgh,Scotland
  • an online game acronym "Rubies of Eventide."
  • a military acronym meaning "Rules of engagement.

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worldwide view.


2nd millennium
Centuries: 19th century - 20th century - 21st century

1920s 1930s 1940s - 1950s - 1960s 1970s 1980s
1950 1951 1952 1953 1954
1955 1956 1957 1958 1959

- -
- The 1950s
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Centuries: 19th century - 20th century - 21st century

1930s 1940s 1950s - 1960s - 1970s 1980s 1990s
1960 1961 1962 1963 1964
1965 1966 1967 1968 1969

- -
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Their 1960s decade refers to the years from 1960 to 1969, inclusive.
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IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), created in 1963, is the world's most comprehensive inventory of the global conservation status of plant and animal species.
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