Blacknose Dace
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Name and Code Family Leuciscidae - minnows Species Rhinichthys atratulus Taxonomic Authority (Hermann 1804) Common Name(s) Blacknose Dace French Name naseux noir Species Code 210 Family TSN 1198935 Parent TSN 163381 Species TSN 163382 Conservation Status Global Rank (GRank) G5 (2016-02-09) National Rank (NRank) N5 (2016-02-09) Provincial Rank (SRank) SNR COSEWIC Status none SARO Status none AFS Status none Status Notes none Ecological Value Ontario Origin native General Abundance limited distribution Tolerance intermediate Economic Importance forage fish; bait fish (occasional) 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 invertivore Thermal Regime coolwater Habitat Preference runs and pools of clear, cool, swiftly-flowing creeks and small rivers with gravelly substrate; preferred water temperature range 19-25°C Reproduction Reproductive Guild Nonguarders: Open substratum spawners: Lithophils Spawning Habitat(s) riverine Spawning Season spring Spawning Month(s) May-June Spawning Temperature (°C) 15.5-22 Fecundity 166-1,116 Nursery Habitat(s) riverine Size and Age Adult Length (cm) 5.6-8.3 TL Adult Weight (kg) 0.001-0.005 Age at Maturity (yrs) 2 Maximum Length (cm) 9.9 TL Maximum Weight (kg) no data Lifespan (yrs) 3-4 Ontario Records Record Length (cm) none Record Weight (kg) none				Ontario Range Map Ontario Distribution St. Lawrence River1 Photographs Notes (1) no confirmed records from Ontario waters; widespread occurrence in southeastern Lake Ontario tributaries (New York) and St. Lawrence River watershed (New York, Quebec) (see also Western Blacknose Dace)
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