Chestnut Lamprey
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Name and Code Family Petromyzontidae - lampreys Species Ichthyomyzon castaneus Taxonomic Authority Girard 1858 Common Name(s) Chestnut Lamprey French Name lamproie brune Species Code 016 Family TSN 159697 Parent TSN 159723 Species TSN 159725 Conservation Status Global Rank (GRank) G4 (2016-04-17) National Rank (NRank) NU (2017-12-27) Provincial Rank (SRank) SU1, S1?2 (2018-03-28) COSEWIC Status Data Deficient (Nov 2010) SARO Status Data Deficient AFS Status none Status Notes (1) Great Lakes-Upper St. Lawrence populations; (2) Saskatchewan-Nelson River populations Ecological Value Ontario Origin native General Abundance rare Tolerance intermediate Economic Importance none Length-Weight Regression Coefficents Intercept (a) -6.2361 Slope (b) 3.2147 Length Basis TL				Habitat and Feeding General Habitat(s) lacustrine; riverine Environment benthic Trophic Class herbivore (carnivore) Thermal Regime coolwater Habitat Preference large creeks and main channels of small- to medium-sized rivers; ammocoetes inhabit sand- and silt-bottomed pools and backwaters Reproduction Reproductive Guild Nonguarders: Brood hiders: Lithophils Spawning Habitat(s) riverine Spawning Season spring Spawning Month(s) May-June Spawning Temperature (°C) 16-22 Fecundity 10,144-42,000 Nursery Habitat(s) riverine Size and Age Adult Length (cm) 17.8-31.0 TL Adult Weight (kg) 0.01-0.06 Age at Maturity (yrs) 5-7 Maximum Length (cm) 38.0 TL Maximum Weight (kg) no data Lifespan (yrs) 7-9 Ontario Records Record Length (cm) 22.4 TL Record Weight (kg) none				Ontario Range Map Ontario Distribution St. Lawrence River, Mad River (Lake Huron tributary), Chippewa River (Lake Superior tributary), Lake-of-the-Woods, Detroit River Photographs Notes sensitive to siltation and pollution; prey includes sturgeon, pike and suckers
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