Northern Brook Lamprey
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Name and Code Family Petromyzontidae - lampreys Species Ichthyomyzon fossor Taxonomic Authority Reighard & Cummins 1916 Common Name(s) Northern Brook Lamprey French Name lamproie du nord Species Code 012 Family TSN 159697 Parent TSN 159723 Species TSN 159726 Conservation Status Global Rank (GRank) G4 (2012-02-17) National Rank (NRank) N3 (2017-08-19) Provincial Rank (SRank) S3 (2013-02-11) COSEWIC Status Special Concern1 (Nov 2020) SARO Status Special Concern (2021) AFS Status none Status Notes (1) Great Lakes-Upper St. Lawrence populations Ecological Value Ontario Origin native General Abundance uncommon Tolerance intolerant Economic Importance none Length-Weight Regression Coefficents Intercept (a) no data Slope (b) no data Length Basis n/a				Habitat and Feeding General Habitat(s) riverine Environment benthic Trophic Class herbivore Thermal Regime coolwater Habitat Preference adults in clean, clear riffles and runs of small rivers with gravel and sand substrates; ammocoetes occupy quiet water with sand, silt and detritus substrates Reproduction Reproductive Guild Nonguarders: Brood hiders: Lithophils Spawning Habitat(s) riverine Spawning Season spring Spawning Month(s) May-June Spawning Temperature (°C) 13-20.5 Fecundity 501-1,979 Nursery Habitat(s) riverine Size and Age Adult Length (cm) 8.6-16.6 TL Adult Weight (kg) 0.001-0.008 Age at Maturity (yrs) 3-7 Maximum Length (cm) 25.4 TL Maximum Weight (kg) 0.01 Lifespan (yrs) 4-8 Ontario Records Record Length (cm) 16.4 TL Record Weight (kg) none				Ontario Range Map Ontario Distribution Great Lakes tributaries (except Ontario), St. Marys River, Lake Nipissing tributaries, St. Clair River, Thames River, Niagara River, Ottawa River, St. Lawrence River Photographs Notes adults nonparasitic and semelparous; ammocoetes sensitive to low water level and fluctuating water temperature; intolerant of salinity
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