Warmouth
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Name and Code
Family
Centrarchidae - sunfishes and basses
Species
Lepomis gulosus
Taxonomic Authority
(Cuvier 1829)
Common Name(s)
Warmouth
French Name
crapet sac-à-lait
Species Code
323
Family TSN
168093
Parent TSN
168130
Species TSN
168139
Conservation Status
Global Rank (GRank)
G5 (2015-05-19)
National Rank (NRank)
N1 (2017-10-31)
Provincial Rank (SRank)
S1 (1988-11-22)
COSEWIC Status
Endangered (May 2015)
SARO Status
Endangered (2015)
AFS Status
none
Status Notes
none
Ecological Value
Ontario Origin
natural dispersal
General Abundance
rare
Tolerance
intermediate
Economic Importance
none
Length-Weight Regression Coefficents
Intercept (a)
-5.18
Slope (b)
3.241
Length Basis
TL
Habitat and Feeding
General Habitat(s)
lacustrine; riverine
Environment
benthopelagic
Trophic Class
invertivore/carnivore
Thermal Regime
warmwater
Habitat Preference
shallow vegetated waters (<1 m) of lakes, ponds, oxbows and quiet areas of streams with clear water and siltly, sandy, organic substrates
Reproduction
Reproductive Guild
Guarders: Nest spawners: Lithophils
Spawning Habitat(s)
lacustrine; riverine
Spawning Season
summer
Spawning Month(s)
June-August
Spawning Temperature (°C)
21-27
Fecundity
6,825-20,238
Nursery Habitat(s)
lacustrine; riverine
Size and Age
Adult Length (cm)
8.9-22.8 TL
Adult Weight (kg)
0.014-0.27
Age at Maturity (yrs)
2-3
Maximum Length (cm)
33.7 TL
Maximum Weight (kg)
1.11
Lifespan (yrs)
6-9
Ontario Records
Record Length (cm)
17.2 TL
Record Weight (kg)
none
Ontario Range Map
Warmouth range
Ontario Distribution
Lake Erie (Rondeau Bay, Point Pelee, Long Point Bay, Big Creek); first reported from Ontario waters in 1966
Photographs
Warmouth photograph
Warmouth photograph
Notes
tolerant of low dissolved oxygen; moderately intolerant of turbidity; hybrids with other sunfishes including Pumpkinseed, Bluegill and Rock Bass reported
Information Sources
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