Shortjaw Cisco
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Name and Code
Family
Salmonidae - trouts and salmons
Species
Coregonus zenithicus
Taxonomic Authority
(Jordan & Evermann 1909)
Common Name(s)
Shortjaw Cisco
French Name
cisco à mâchoires égales
Species Code
100
Family TSN
161931
Parent TSN
161932
Species TSN
161948
Conservation Status
Global Rank (GRank)
G3 (2015-08-17)
National Rank (NRank)
N2 (2017-08-19)
Provincial Rank (SRank)
S2 (1997-04-01)
COSEWIC Status
Threatened (May 2003)
SARO Status
Threatened (2008)
AFS Status
Threatened (1,2,4)
Status Notes
none
Ecological Value
Ontario Origin
native
General Abundance
rare
Tolerance
intolerant
Economic Importance
commercial fishery (historical)
Length-Weight Regression Coefficents
Intercept (a)
no data
Slope (b)
no data
Length Basis
n/a
Habitat and Feeding
General Habitat(s)
lacustrine
Environment
pelagic
Trophic Class
planktivore
Thermal Regime
coldwater
Habitat Preference
clear, deep waters (20-183 m) below thermocline, usually 55-144 m
Reproduction
Reproductive Guild
Nonguarders: Open substratum spawners: Litho-pelagophils
Spawning Habitat(s)
lacustrine
Spawning Season
fall
Spawning Month(s)
October-December
Spawning Temperature (°C)
<5
Fecundity
3,230-18,768
Nursery Habitat(s)
lacustrine
Size and Age
Adult Length (cm)
24.3-34.5 TL
Adult Weight (kg)
0.08-0.28
Age at Maturity (yrs)
3-6
Maximum Length (cm)
41.1 FL
Maximum Weight (kg)
1.06
Lifespan (yrs)
10-13
Ontario Records
Record Length (cm)
40.4 TL
Record Weight (kg)
1
Ontario Range Map
Shortjaw Cisco range
Ontario Distribution
Lake Superior, Lake Nipigon, Lake Huron, Lake-of-the-Woods, and some larger inland lakes
Photographs
Shortjaw Cisco photograph
Shortjaw Cisco photograph
Notes
dwarf populations occur in some lakes in Algonquin Park; spring spawning has been reported in Lake Superior
Information Sources
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