Longjaw Cisco
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Name and Code
Family
Salmonidae - trouts and salmons
Species
Coregonus alpenae
Taxonomic Authority
(Koelz 1924)
Common Name(s)
Longjaw Cisco
French Name
cisco à grande bouche
Species Code
092
Family TSN
161931
Parent TSN
161932
Species TSN
161949
Conservation Status
Global Rank (GRank)
GNR
National Rank (NRank)
NNR
Provincial Rank (SRank)
SNR
COSEWIC Status
Extinct (May 2000)
SARO Status
none
AFS Status
Extinct (1,2,4)
Status Notes
none
Ecological Value
Ontario Origin
endemic
General Abundance
extinct
Tolerance
intolerant
Economic Importance
commercial fishery (historical)
Length-Weight Regression Coefficents
Intercept (a)
-5.0163
Slope (b)
3.0606
Length Basis
SL
Habitat and Feeding
General Habitat(s)
lacustrine
Environment
pelagic
Trophic Class
planktivore/invertivore
Thermal Regime
coldwater
Habitat Preference
clear, cold, deep waters (51-128 m), usually (94-112 m), at water temperatures of 1.5-11.2°C; preferred water temperature range 3.8-7.0°C
Reproduction
Reproductive Guild
Nonguarders: Open substratum spawners: Pelagophils
Spawning Habitat(s)
lacustrine
Spawning Season
fall
Spawning Month(s)
November-December
Spawning Temperature (°C)
5.6
Fecundity
20,000
Nursery Habitat(s)
lacustrine
Size and Age
Adult Length (cm)
25.1-40.6 TL
Adult Weight (kg)
0.12-0.56
Age at Maturity (yrs)
3-4
Maximum Length (cm)
54.6 TL
Maximum Weight (kg)
1.857
Lifespan (yrs)
9 (m); 8 (f)
Ontario Records
Record Length (cm)
34.8 TL
Record Weight (kg)
none
Ontario Range Map
Longjaw Cisco range
Ontario Distribution
formerly occurred in Lake Huron and Lake Erie; last reported from Lake Erie in 1957 and Lake Huron (Georgian Bay) in 1975
Photographs
Longjaw Cisco photograph
Longjaw Cisco photograph
Notes
previously considered a synonym of Coregonus zenithicus
Information Sources
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