United States (contiguous states) country information

Common names: Cowhead Lake tui chub, Tui chub
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref: Page, L.M. and B.M. Burr, 2011
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the Columbia River drainage in Washington, Oregon and Idaho, south in Klamath and upper Pit River (Sacramento River drainage) and interior drainages of Nevada and California to Mohave River in south California. Locally abundant but declining in some areas because of habitat degradation and introduced species (Ref. 5723, 86798). Status of threat of the following subspecies: 1). Gila bicolor euchila: endangered; status declined since 1989. Criteria: 1,4,5; 2). Gila bicolor eurysoma: endangered; status declined since 1989. Criteria: 1,5; 3). Gila bicolor isolata: endangered; status improved since 1989. Criteria: 1,4,5; 4). Gila bicolor mohavensis: endangered; status same as 1989. Criteria: 1,4,5; 5). Gila bicolor newarkensis: threatened; status declined since 1989. Criteria: 1,5; 6). Gila bicolor oregonensis: threatened; status declined since 1989. Criteria: 5; 7). Gila bicolor snyderi: endangered; status same as 1989. Criteria: 1,4,5; 8). Gila bicolor thalassina: threatened. Criteria: 1,4, 5; 9). Gila bicolor vaccaceps: endangered; status declined since 1989. Criteria: 1,5 (http://fisc.er.usgs.gov/afs/) (Ref. 81264).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/us.html
National Fisheries Authority: http://www.nmfs.gov
Occurrences: Occurrences Point map
Main Ref: Page, L.M. and B.M. Burr, 2011
National Database:

Common names from other countries

Gila dvojbarvá, Tui-lätteturbik, 双色骨尾鱼, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Cypriniformes (Carps) > Leuciscidae (Minnows) > Laviniinae
Etymology: bicolor: Name from the Latin word 'vacca' meaning cow and 'ceps' meaning head, for the type locality; noun in apposition (Ref. 56397).
More on author: Girard.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic. Temperate; 44°N - 35°N

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

North America: Columbia River drainage in Washington, Oregon and Idaho, south in Klamath and upper Pit River (Sacramento River drainage) and interior drainages of Nevada and California to Mohave River in south California, USA. Distinctive subspecies were recognized: Gila bicolor snyderi (protected) in Owens River, California; Gila bicolor mohavensis (protected) in Mojave River, California; Gila bicolor bicolor in Klamath River system in Oregon and California; Gila bicolor obesa, a stream and spring-inhabiting form; and G. bicolor pectinifer, a lake-inhabiting form, both in Lake Lahontan basin in Nevada.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 45.0 cm TL male/unsexed; (Ref. 86798)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 8; Anal soft rays: 7 - 8. Siphateles bicolor can be distinguished by the following characters: lateral line with 41-64 scales; dorsal fin usually with 8 rays; anal fin with 7-8 rays; pharyngeal teeth 0,5-5,0; deep, compressed body; dorsal-fin origin over pelvic- fin origin; fairly deep caudal peduncle; small, rounded fins; small, terminal to slightly subterminal mouth; does not extend to eye; dusky olive to dark green above; brassy brown side, often mottled in adult; silver white to yellow below; clear to dusky olive fins; young with dusky stripe along side; large individuals may have yellow to copper fins with pink, red, or orange bases, red-orange lower side (Ref. 86798).

Inhabits lakes and quiet, vegetated, mud or sand-bottomed pools of headwaters, creeks and small to large rivers (Ref. 86798).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 07 February 2012

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01202 (0.00492 - 0.02938), b=3.03 (2.81 - 3.25), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 2.0 ±0.2 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.19-0.33).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (49 of 100).

Siphateles bicolor (Girard, 1856)