Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Leuciscidae
(Minnows) > Laviniinae
Etymology: Acrocheilus: Greek, akro = topmost, summit + Greek, cheilos =lip (Ref. 45335); alutaceus: The specific name is derived from alutaceus (leathery) (Ref. 1998).
More on authors: Agassiz & Pickering.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Temperate; 55°N - 41°N
North America: Fraser and Columbia River drainages in British Columbia in Canada, Washington, Idaho, Oregon, and Nevada in USA; Harney River basin in Oregon, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm TL male/unsexed; (Ref. 86798); common length : 17.5 cm TL male/unsexed; (Ref. 12193)
soft rays: 9 - 10. Moderately compressed body, deepest in front of dorsal fin; strong tapering to narrow caudal peduncle; large, forked caudal fin; wide head; subterminal mouth; hard plate on lower jaw; large eye; dorsal-fin origin over pelvic-fin origin; rounded, protruding snout; decurved, complete lateral line with 85-93 scales; long intestine (at least twice length of body) ; black peritoneum; dorsal fin with 10-11 rays; anal fin with 9-10 rays; pharyngeal teeth 0,4-4,0 to 0,5-5,0; gray above, brassy silver side; yellow to brown fins; large individuals with gray dorsal and caudal fins, orange at pectoral and pelvic-fin bases (Ref. 86798). Tail large and flaring. Lower jaw bears a sharp edge, nearly square when viewed from beneath. Sharp part of lip consist of cornified epithelium which is sometimes slightly calcified. Internal to the fleshy upper lip is a small, hard plate upon which the lower lip bears. Young fish have a more rounded lower lip, when viewed either laterally or from below. Digestive tract in adults is about twice the length of the body, with most of its length consisting of a coiled section posterior to the entry of the bile duct (Ref. 52680).
Occurs in flowing pools and runs over sand and gravel in creeks and small to medium rivers; also in margins of lakes (Ref. 86798). Adults feed mainly on diatoms, also on filamentous algae; young feed on surface insects (Ref. 1998).
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. 125652)
Threat to humans
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01148 (0.00453 - 0.02909), b=3.03 (2.81 - 3.25), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic level (Ref. 69278
): 2.1 ±0.0 se; based on diet studies.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (tm=3-4).
Fishing Vulnerability (Ref. 59153
): Moderate vulnerability (44 of 100) .
Climate Vulnerability (Ref. 125649
): (0 of 100) .