Margined Madtom
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Name and Code Family Ictaluridae - North American catfishes Species Noturus insignis Taxonomic Authority (Richardson 1836) Common Name(s) Margined Madtom French Name chat-fou liséré Species Code 238 Family TSN 163995 Parent TSN 164002 Species TSN 164004 Conservation Status Global Rank (GRank) G5 (2015-10-02) National Rank (NRank) NU (2017-08-21) Provincial Rank (SRank) SU (2018-03-29) COSEWIC Status Data Deficient (May 2002) SARO Status Data Deficient AFS Status none Status Notes none Ecological Value Ontario Origin introduced General Abundance rare Tolerance intermediate Economic Importance none Length-Weight Regression Coefficents Intercept (a) -4.748 Slope (b) 2.89 Length Basis TL				Habitat and Feeding General Habitat(s) riverine Environment benthic Trophic Class invertivore Thermal Regime warmwater Habitat Preference riffles and runs of clear, fast-flowing creeks and small to medium rivers with cobble, boulder or coarse gravel substrates and lakes Reproduction Reproductive Guild Guarders: Nest spawners: Speleophils Spawning Habitat(s) riverine Spawning Season summer Spawning Month(s) June-July Spawning Temperature (°C) 20-26 Fecundity 53-460 Nursery Habitat(s) riverine Size and Age Adult Length (cm) 6.4-12.6 TL Adult Weight (kg) 0.003-0.022 Age at Maturity (yrs) 1-2 (m); 2-3 (f) Maximum Length (cm) 17.9 TL Maximum Weight (kg) 0.036 Lifespan (yrs) 4-5 Ontario Records Record Length (cm) 15.9 TL Record Weight (kg) none				Ontario Range Map Ontario Distribution Ottawa River Tributaries (Fall River, Bolton Creek, Mississippi River), Lake Joseph, Lake Muskoka, Lake Rosseau; first reported from Ontario waters in 1976 Photographs Notes native to eastern United States; likely introduced by bait-bucket transfer, although may be native; sensitive to siltation; hybrids with Stonecat reported
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