Bigmouth Buffalo
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Name and Code
Family
Catostomidae - suckers
Species
Ictiobus cyprinellus
Taxonomic Authority
(Valenciennes, 1844)
Common Name(s)
Bigmouth Buffalo
French Name
buffalo à grande bouche
OMNR Code
166
Family TSN
163892
Parent TSN
163954
Species TSN
163956
Conservation Status
Global Rank (GRank)
G5 (2015-08-18)
National Rank (NRank)
N4N5 (2015-08-18)
Provincial Rank (SRank)
S4 (2009-10-20)
COSEWIC Status
Not at Risk* (Apr 2008)
SARO Status
Not at Risk
AFS Status
none
Ecological Value
Ontario Origin
natural dispersal
General Abundance
uncommon
Tolerance
intermediate
Economic Importance
none
Habitat and Feeding
General Habitat(s)
lacustrine; riverine
Environment
benthic
Trophic Class
invertivore
Thermal Regime
warmwater
Habitat Preference
main channels, deeper pools and backwaters of medium to large turbid, vegetated rivers, lakes and impoundments; preferred water temperature range 18-26°C
Reproduction
Reproductive Guild
Nonguarders: Open substratum spawners: Litho-pelagophils
Spawning Habitat(s)
lacustrine; riverine
Spawning Season
spring
Spawning Month(s)
May-June
Spawning Temperature (°C)
15-25
Fecundity
347,641-750,322
Nursery Habitat(s)
lacustrine; riverine
Size and Age
Adult Length (cm)
35.6-66.9 TL
Adult Weight (kg)
0.8-5.5
Age at Maturity (yrs)
7-9 (m); 8-10 (f)
Maximum Length (cm)
157.0 TL
Maximum Weight (kg)
36.4
Lifespan (yrs)
19-26
Ontario Range Map
Bigmouth Buffalo range
Ontario Distribution
southwestern Ontario drainages of lakes Huron, St. Clair and Erie; northwestern Ontario (Lake-of-the-Woods); Lake Ontario (Hamilton Harbour, Bay of Quinte); first reported from Ontario waters of Lake Erie (Long Point Bay) in 1957
Photograph
Bigmouth Buffalo photograph
Notes
* - Great Lakes - Upper St. Lawrence populations; tolerant of low dissolved oxygen and high water temperature (31.7°C); moderately tolerant of turbidity; spawning requires flooding; hybridize naturally with Black Buffalo and Smallmouth Buffalo
Ontario Records
Record Length (cm)
81.0 TL
Record Weight (kg)
8.22
Information Sources
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