Greater Redhorse
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Name and Code
Family
Catostomidae - suckers
Species
Moxostoma valenciennesi
Taxonomic Authority
Jordan 1885
Common Name(s)
Greater Redhorse
French Name
chevalier jaune
Species Code
172
Family TSN
163892
Parent TSN
163927
Species TSN
163947
Conservation Status
Global Rank (GRank)
G4 (2001-02-20)
National Rank (NRank)
N4 (2017-12-28)
Provincial Rank (SRank)
S3 (1997-10-09)
COSEWIC Status
none
SARO Status
none
AFS Status
Vulnerable (1)
Status Notes
none
Ecological Value
Ontario Origin
native
General Abundance
uncommon
Tolerance
intolerant
Economic Importance
none
Length-Weight Regression Coefficents
Intercept (a)
no data
Slope (b)
no data
Length Basis
n/a
Habitat and Feeding
General Habitat(s)
lacustrine, riverine
Environment
benthic
Trophic Class
invertivore
Thermal Regime
warmwater
Habitat Preference
moderate to swift current riffles, runs and pools of medium to large rivers with clear water and substrates of gravel, cobble or boulders; lakes
Reproduction
Reproductive Guild
Nonguarders: Open substratum spawners: Lithophils
Spawning Habitat(s)
riverine
Spawning Season
spring
Spawning Month(s)
May-June
Spawning Temperature (°C)
13-19
Fecundity
25,190-71,920
Nursery Habitat(s)
riverine
Size and Age
Adult Length (cm)
38.1-61.6 TL
Adult Weight (kg)
0.5-2.2
Age at Maturity (yrs)
5 (m); 6 (f)
Maximum Length (cm)
80 TL
Maximum Weight (kg)
7.26
Lifespan (yrs)
12-20
Ontario Records
Record Length (cm)
68.8 TL
Record Weight (kg)
5.9
Ontario Range Map
Greater Redhorse range
Ontario Distribution
Ottawa River and tributaries, tributaries of Lakes Ontario, Erie, St. Clair and Huron, north to Spanish River, English River, Lake-of-the-Woods
Photographs
Greater Redhorse photograph
Greater Redhorse photograph
Notes
sensitive to turbidity, siltation and pollution; use as bait prohibited
Information Sources
Warren, M.L., Jr., and B.M. Burr [Eds]. 2014. Freshwater Fishes of North America, Volume 1: Petromyzontidae to Catostomidae. Johns Hopkins University Press, Baltimore, Maryland. xv + 644 pp.