Catostomus macrocheilus

Identification Tips:

•Adults bronze in colour with whitish belly
•Juveniles brown to olive green with dark patches and whitish belly
•Large scales;, usually has fewer than 75 along the lateral line
•Dorsal fin: 12-17 (usually 13-16) rays.
•Short snout when viewed from below, scarcely projects beyond the upper lip.
•The only sucker in the Fraser Valley that exceeds 30 cm in size

Conservation Status:

British ColumbiaCanadaNatureserve
COSEWICSpecies at Risk Act
Not at Risk (Yellow List)Not AssessedNoneG5, S5

Information Source: BC Conservation Data Centre: http://a100.gov.bc.ca/pub/eswp/

Life History:

•Mature in 4th or 5th year and may live more than 11 years.
•May exceed 60 cm in length
•Young feed on zooplankton and small invertebrates
•Adults feed on algae, mollusks and other invertebrates.
•Spawn in late spring.
•Preyed upon by fish eating birds and during spawning by eagles, and bears.

Habitat:

•Occurs in slow moving pools and runs of medium to large rivers, and in lakes.
•Spawning occurs in gravel riffles of streams or gravel shoals of lakes
•Juveniles rearing occurs in pools and ponds of smaller creeks and side channels of larger rivers

Range:

British Columbia
•Widespread in southern two-third of Province
•Absent from smaller coastal drainages including Nicomekl, Serpentine and Little Campbell Rivers in the Fraser Valley

Global
•From BC and Alberta south to Idaho, Nevada and Oregon
•Isolated population in Mackenzie River, Northwest Territories

Comments:

•The most common sucker in southern half of BC

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Primary Information Source:
McPhail, J.D. 2007. The Freshwater Fishes of British Columbia. University of Alberta Press. Edmonton, Alberta.