Klamath smallscale sucker explained

The Klamath smallscale sucker (Catostomus rimiculus), also known as the Jenny Creek sucker,[1] [2] is a species of ray-finned fish in the family Catostomidae.[3] It is a freshwater fish that primarily inhabits the Trinity and Klamath River watersheds, as well as the overall region of the Klamath Basin in general. Within the Klamath Basin, they inhabit the area along with three other sucker fish:[4] the Lost River sucker, shortnose sucker, and the Klamath largescale sucker. These fish can vary in length from 35 cm to 50 cm,[5] and usually have a lifespan of around 9-15 years. They often form mixed schools with speckled dace, sculpins, and juvenile steelhead.[6]

A population of the species separated from the Klamath River by a waterfall are called Jenny Creek suckers.

Distribution

Klamath smallscale suckers primarily inhabits the Trinity and Klamath River watersheds.[7] Within the Klamath River basin it is considered rare.[8]

Genetic analyses suggest that six or fewer Klamath smallscale suckers from the Klamath River founded the population in the Smith River.[9]

Relationship with humans

In Oregon Klamath smallscale suckers are listed as a sensitive species of concern.[10]

The International Game Fish Association all tackle world record for the Klamath smallscale sucker stands at 2 lbs 8 oz taken from the Trinity River near Del Loma, California.[11]

Life Cycle

Reproduction

Klamath smallscale suckers migrate to tributary streams to reproduce in the spring. Female suckers are able to produce 15,000-20,000 eggs, which male suckers then externally fertilize.[12] They migrate to the larger streams where they spend their adulthood.

Growth

Jenny Creek Suckers live up to 5-6 years, while the Klamath population has a longer life expectancy up to 17 years. Both populations experience rapid growth in the first half of their lives, with Jenny Creek Suckers and Klamath smallscale suckers reaching their maximum sizes by around 3 years and 10 years, respectively. Compared to Jenny Creek Suckers that reach around 140 mm length at their maturity, Klamath suckers are significantly larger, reaching up to 400 mm in size.[13]

Genetics

Klamath smallscale suckers are genetically closely related to three other species of the Catostomidae family that also inhabit the Klamath River: Klamath largescale suckers, Lost River suckers, and Shortnose suckers.[14] The four species and their eggs are highly similar in appearance, leading to frequent misclassification. Research suggests that there is hybridization occurring among the four species, the cause of which has yet to be determined.[15]

External links

Notes and References

  1. Web site: ADW: Catostomus rimiculus: CLASSIFICATION . 2022-10-01 . animaldiversity.org.
  2. Web site: Rossa . Jeannine M. . Parker . Michael S. . October 24, 2007 . Population Characteristics of Jenny Creek Suckers (Catostomus rimiculus): Age-Size Relationships, Age Distribution, Apparent Densities, and Management Implications . 2022-10-20 . Southern Oregon Digital Archives . U. S. Bureau of Land Management . en.
  3. Web site: Klamath smallscale sucker - Encyclopedia of Life . 2022-10-09 . eol.org.
  4. Web site: Klamath Sucker Fish . 2022-10-20 . Oregon Wild . en.
  5. Web site: California Fish Species - California Fish Website . 2022-10-20 . calfish.ucdavis.edu.
  6. Web site: Klamath Smallscale Sucker . 9 April 2019 . ucdavis.edu . UC Davis.
  7. Web site: Klamath Smallscale Sucker . 9 April 2019 . ucdavis.edu . UC Davis.
  8. Web site: Steve Kirk . Katharine Carter and . Appendix 5 Fish and Fishery Resources of the Klamath River Basin . www.waterboards.ca.gov . Government of California . 18 December 2019.
  9. Kinziger . Andrew P. . White . Jason L. . Nakamoto . Rodney J. . Harvey . Bret C. . May 2021 . Recent, small beginnings: genetic analysis suggests Catostomus rimiculus (Klamath smallscale sucker) in the Smith River, California, are introduced . Journal of Fish Biology . John Wiley & Sons, Ltd . 98 . 5 . 1321–1328 . 10.1111/jfb.14664 . 33389757 . 230485262 . 0022-1112.
  10. Web site: Klamath Sucker Fish . oregonwild.org . Oregon Wild . 18 December 2019.
  11. Web site: Sucker, Klamath Smallscale . igfa.org . International Game Fish Association . 9 April 2019.
  12. Web site: California Fish Species - California Fish Website . 2022-10-20 . calfish.ucdavis.edu.
  13. Web site: Rossa . Jeannine M. . Parker . Michael S. . October 24, 2007 . Population Characteristics of Jenny Creek Suckers (Catostomus rimiculus): Age-Size Relationships, Age Distribution, Apparent Densities, and Management Implications . 2022-10-20 . Southern Oregon Digital Archives . U. S. Bureau of Land Management . en.
  14. Characterization of the genetic structure of four sucker species in the Klamath River Basin . Smith . Matt . Bargen . Jennifer Von . March 4, 2020 . U.S. Fish and Wildlife Service . Smith . Christian . Miller . Michael . Rasmussen . Josh . Hewitt . David A. . 2022-10-20.
  15. Sada . Donald W. . Rasmussen . Josh E. . Buettner . Mark . March 1993 . Revised recovery plan for the Lost River sucker (Deltistes luxatus) and shortnose sucker (Chasmistes brevirostris) . U.S. Fish and Wildlife Service.

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