Overview

Distribution

endemic to a single nation

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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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North America: Mexico.
  • Jelks, H.L., S.J. Walsh, N.M. Burkhead, S. Contreras-Balderas, E. Díaz-Pardo, D.A. Hendrickson, J. Lyons, N.E. Mandrak, F. McCormick, J.S. Nelson, S.P. Platania, B.A. Porter, C.B. Renaud, J.J. Schmitter-Soto, E.B. Taylor and M.L. Warren Jr. 2008 Conservation status of imperiled North American freshwater and diadromous fishes. Fisheries 33(8):372-407. (Ref. 81264)   http://www.fishbase.org/references/FBRefSummary.php?id=81264&speccode=11953 External link.
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Pacific Slope of Mexico.
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Ecology

Habitat

Habitat Type: Freshwater

Comments: Primary habitat is small headwater streams (Behnke 2002).

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Habitat and Ecology

Systems
  • Freshwater
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Environment

benthopelagic; freshwater
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Migration

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

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Life History and Behavior

Life Cycle

Reproductive strategy: synchronous ovarian organization, determinate fecundity (Ref. 51846).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Oncorhynchus chrysogaster

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 23
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G2 - Imperiled

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IUCN Red List Assessment


Red List Category
VU
Vulnerable

Red List Criteria
A2ce

Version
2.3

Year Assessed
1996
  • Needs updating

Assessor/s
Contreras-Balderas, S. & Almada-Villela, P.

Reviewer/s

Contributor/s

History
  • 1994
    Vulnerable
    (Groombridge 1994)
  • 1990
    Vulnerable
    (IUCN 1990)
  • 1988
    Indeterminate
    (IUCN Conservation Monitoring Centre 1988)
  • 1986
    Indeterminate
    (IUCN Conservation Monitoring Centre 1986)
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Threats

Vulnerable (VU) (A2ce)
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: minor commercial
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Wikipedia

Mexican golden trout

The Mexican golden trout (Oncorhynchus chrysogaster) is a species of fish in the Salmonidae family. It is endemic to Mexico.

Description[edit]

The Mexican golden trout is sexually dimorphic, males can easily be identified from females due to their much longer jaws or kype. Mexican golden trout are brightly colored with blue parr marks on both males and females along the side of the body. Purple scaling is visible along the lateral line. Both sexes also have bright golden-yellow belly coloration. The top of the fish and the tailfin are covered in small black spots with much larger spotting on the dorsal fin. The pectoral fins, pelvic fin and anal fin are light orange in color with white tips. Due to their harsh and small stream habitat the Mexican golden trout remains small even when fully grown. Adults rarely reach over a foot long with the maximum size probably being 10 inches (25 cm).

Distribution[edit]

Mexican golden trout have an extremely limited range, being found only in the pristine high-elevation headwaters of the Fuerte River, Sinaloa River, and Culiacán River drainages in the Sierra Madre Occidental.

Habitat[edit]

Mexican golden trout are limited to small streams known as arroyos created by small cienegas (spring-fed marshes) above 5,000 feet. The surrounding landscape is dominated by deep canyons, scrub forest, evergreens and hardwoods.

Status and threats[edit]

Due to their small range and highly sensitive, isolated habitat Mexican golden trout are considered vulnerable. The biggest threats being human development and the possibility of competition/interbreeding with hatchery rainbow trout. The Mexican golden trout was declared an endangered species in 1996.

Sources[edit]

  • Behnke, Robert J., and Joseph R. Tomelleri. Trout and salmon of North America . Chanticleer Press ed., 1st ed. New York: Free Press, 2002. Print.
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