Roadless Areas
Home/Species/ Klamath Smallscale Sucker

Catostomus rimiculus

Gilbert and Snyder, 1898

Klamath Smallscale Sucker

G5Secure Found in 5 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
Least concernIUCN
Identity
Unique IDELEMENT_GLOBAL.2.105489
Element CodeAFCJC02180
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVertebrate Animal
IUCNLeast concern
Endemicendemic to a single nation
KingdomAnimalia
PhylumCraniata
ClassActinopterygii
OrderCypriniformes
FamilyCatostomidae
GenusCatostomus
Concept Reference
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea, and W.B. Scott. 1991. Common and scientific names of fishes from the United States and Canada. American Fisheries Society, Special Publication 20. 183 pp.
Taxonomic Comments
See Smith (1992) for a study of the phylogeny and biogeography of the Catostomidae.
Conservation Status
Rank MethodExpertise without calculation
Review Date2011-10-31
Change Date2001-01-23
Edition Date2011-10-31
Edition AuthorsHammerson, G.
Range Extent5000-200,000 square km (about 2000-80,000 square miles)
Number of Occurrences21 - 80
Range Extent Comments
Range includes the Rogue River drainage, southwestern Oregon, south to the Trinity River drainage, northwestern California, including the Trinity River and its larger tributaries and the Klamath River and tributaries below the falls (Moyle 2002, Page and Burr 2011). Jenny Creek population is isolated by a high waterfall on Jenny Creek, a tributary of the Klamath River; the suckers are using the entire watershed accessible to them (Rossa 1999).
Occurrences Comments
This species is represented by a moderate number of occurrences (subpopulations).
Threat Impact Comments
Irrigation diversions reduce streamflow, raise water temperatures, and reduce water quality, all of which degrade fish habitat, particularly in summer. Diversions also reduce winter flows, which are important in creating deep pools that may hold water in summer. These threats exist in the Jenny Creek watershed and throughout most of upper Klamath River basin (Oregon Natural Resources Council website, www.ornc.org, 2002). However, according to Moyle (2002): "If anything, dams and diversions have increased...habitat by providing more quiet, warm waters."
Ecology & Habitat

Habitat

Habitat includes silt- to rock-bottomed pools and runs of small to medium rivers (Page and Burr 2011). In Jenny Creek in summer, adults preferred pools and cascades, whereas young of the year occurred mainly in pools and glides (Rossa 1999). This sucker also occasionally inhabits reservoirs. It migrates up tributary streams to spawn in riffles over gravel or cobble; Jenny Creek suckers migrate from the mainstem of a stream into small tributaries (Hohler 1981). In the Jenny Creek system, different age classes tended to use different reaches and different habitats; variation in spring flow and summer discharge may be important in habitat use patterns (Rossa 1999).

Ecology

Little information available about the life history of this species, but it is probably similar to other suckers. Abun- dant throughout its range (Moyle 1976).

Reproduction

Spawns in spring. Matures at 2-3 years in Jenny Creek, 4-5 years in Klamath and Rogue rivers (Hohler 1981). Maximum life span is about 9 years (Lee et al. 1980).
Other Nations (1)
United StatesN5
ProvinceRankNative
CaliforniaSNRYes
OregonS3Yes
Threat Assessments
ThreatScopeSeverityTiming
7 - Natural system modifications—UnknownHigh (continuing)
7.2 - Dams & water management/use—UnknownHigh (continuing)

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Roadless Areas (5)
California (5)
AreaForestAcres
ChanchelullaShasta-Trinity National Forest3,915
Orleans Mtn. BSix Rivers National Forest17,183
PattisonShasta-Trinity National Forest29,299
Salt GulchShasta-Trinity National Forest6,511
UnderwoodSix Rivers National Forest6,591
References (15)
  1. Harris, P., and K. Currens. 1993. Biochemical taxonomy of Klamath smallscale suckers, Catostomus rimiculus Gilbert and Snyder, from Jenny Creek and Rogue River, Oregon, and Scott River and Shovel Creek, California. Report to Bureau of Land Management, Medford, Oregon. 16 pp.
  2. Hohler, D. B. 1981. A dwarfed population of Catostomus rimiculus (Catostomidae: Pisces) in Jenny Creek, Jackson County, Oregon. M.S. thesis, Oregon State University, Corvallis. 76 pp.
  3. Lee, D. S., C. R. Gilbert, C. H. Hocutt, R. E. Jenkins, D. E. McAllister, and J. R. Stauffer, Jr. 1980. Atlas of North American freshwater fishes. North Carolina State Museum of Natural History, Raleigh, North Carolina. i-x + 854 pp.
  4. Master, L. L. 1996. Synoptic national assessment of comparative risks to biological diversity and landscape types: species distributions. Summary Progress Report submitted to Environmental Protection Agency. The Nature Conservancy, Arlington, Virginia. 60 pp.
  5. Master, L. L. and A. L. Stock. 1998. Synoptic national assessment of comparative risks to biological diversity and landscape types: species distributions. Summary Report submitted to Environmental Protection Agency. The Nature Conservancy, Arlington, VA. 36 pp.
  6. Moyle, P. B. 1976a. Inland fishes of California. University of California Press, Berkeley, California. 405 pp.
  7. Moyle, P. B. 2002. Inland fishes of California. Revised and expanded. University of California Press, Berkeley. xv + 502 pp.
  8. Nelson, J. S., E. J. Crossman, H. Espinosa-Perez, L. T. Findley, C. R. Gilbert, R. N. Lea, and J. D. Williams. 2004. Common and scientific names of fishes from the United States, Canada, and Mexico. American Fisheries Society, Special Publication 29, Bethesda, Maryland. 386 pp.
  9. Page, L. M., and B. M. Burr. 1991. A field guide to freshwater fishes: North America north of Mexico. Houghton Mifflin Company, Boston, Massachusetts. 432 pp.
  10. Page, L. M., and B. M. Burr. 2011. Peterson field guide to freshwater fishes of North America north of Mexico. Second edition. Houghton Mifflin Harcourt, Boston. xix + 663 pp.
  11. Page, L. M., H. Espinosa-Pérez, L. T. Findley, C. R. Gilbert, R. N. Lea, N. E. Mandrak, R. L. Mayden, and J. S. Nelson. 2013. Common and scientific names of fishes from the United States, Canada, and Mexico. Seventh edition. American Fisheries Society, Special Publication 34, Bethesda, Maryland.
  12. Page, L. M., K. E. Bemis, T. E. Dowling, H.S. Espinosa-Pérez, L.T. Findley, C. R. Gilbert, K. E. Hartel, R. N. Lea, N. E. Mandrak, M. A. Neigbors, J. J. Schmitter-Soto, and H. J. Walker, Jr. 2023. Common and scientific names of fishes from the United States, Canada, and Mexico. Eighth edition. American Fisheries Society (AFS), Special Publication 37, Bethesda, Maryland, 439 pp.
  13. Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea, and W.B. Scott. 1991. Common and scientific names of fishes from the United States and Canada. American Fisheries Society, Special Publication 20. 183 pp.
  14. Rossa, J. M. 1999. The importance of fish size, environmental variables, and year to Jenny Creek sucker summer habitat use at two different spatial scales. M.S. thesis, Utah State University, Logan, Utah. x + 94 pp.
  15. Smith, G. R. 1992. Phylogeny and biogeography of the Catostomidae, freshwater fishes of North America and Asia. Pages 778-826 in R.L. Mayden, editor. Systematics, historical ecology, and North American freshwater fishes. Stanford University Press, Stanford, California. xxvi + 969 pp.