The Klamath smallscale sucker ''(Catostomus rimiculus)'', also known as the Jenny Creek sucker, is a species of

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or h ...

in the family

Catostomidae The Catostomidae are the suckers of the order Cypriniformes, with about 78 species in this family of freshwater fishes. The Catostomidae are almost exclusively native to North America. The only exceptions are '' Catostomus catostomus,'' found i ...

. It is a freshwater fish that primarily inhabits the

Trinity The Christian doctrine of the Trinity (, from 'threefold') is the central dogma concerning the nature of God in most Christian churches, which defines one God existing in three coequal, coeternal, consubstantial divine persons: God the ...

and

Klamath River The Klamath River (Karuk: ''Ishkêesh'', Klamath: ''Koke'', Yurok: ''Hehlkeek 'We-Roy'') flows through Oregon and northern California in the United States, emptying into the Pacific Ocean. By average discharge, the Klamath is the second larges ...

watersheds, as well as the overall region of the

Klamath Basin The Klamath Basin is the region in the U.S. states of Oregon and California drained by the Klamath River. It contains most of Klamath County and parts of Lake and Jackson counties in Oregon, and parts of Del Norte, Humboldt, Modoc, Siskiyou, ...

in general. Within the Klamath Basin, they inhabit the area along with three other sucker fish: the

Lost River sucker The Lost River sucker (''Deltistes luxatus'') is a species of ray-finned fish in the family Catostomidae. It is the only living member of the genus ''Deltistes''. It is found only in California and Oregon. Its population is much reduced from his ...

shortnose sucker The shortnose sucker (''Chasmistes brevirostris'') is a rare species of fish in the family Catostomidae, the suckers. This fish is native to southern Oregon and northern California in the United States. It is a federally listed endangered specie ...

, and the Klamath largescale sucker. These fish can vary in length from 35 cm to 50 cm, and usually have a lifespan of around 9-15 years. They often form mixed schools with speckled dace, sculpins, and juvenile steelhead. 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

watersheds. Within the Klamath River basin it is considered rare. Genetic analyses suggest that six or fewer Klamath smallscale suckers from the Klamath River founded the population in the Smith River.

Relationship with humans

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

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. 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.

Genetics

Klamath smallscale suckers are genetically closely related to three other species of the ''

'' family that also inhabit the Klamath River: Klamath largescale suckers, Lost River suckers, and Shortnose suckers. 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.

References

External links

* https://researcharchive.calacademy.org/research/ichthyology/types/Index.asp {{Taxonbar, from=Q6424130 Catostomus