Deepwater Sculpin
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Name and Code Family Psychrolutidae - fathead sculpins Species Myoxocephalus thompsonii Taxonomic Authority (Girard 1851) Common Name(s) Deepwater Sculpin French Name chabot de profondeur Species Code 384 Family TSN 167410 Parent TSN 167311 Species TSN 167323 Conservation Status Global Rank (GRank) G5 (2015-08-18) National Rank (NRank) N5 (2017-12-22) Provincial Rank (SRank) S3?1 (2018-03-28), S42, SU3 (2018-03-29) COSEWIC Status Special Concern1, Not at Risk2, Data Deficient3 (April 2017) SARO Status Not at Risk1,2, Data Deficient3 (2017) AFS Status none Status Notes (1) Great Lakes-Upper St. Lawrence populations; (2) Saskatchewan-Nelson River populations; (3) Southern Hudson Bay-James Bay populations Ecological Value Ontario Origin native General Abundance uncommon Tolerance intolerant Economic Importance forage fish Length-Weight Regression Coefficents Intercept (a) -6.009 Slope (b) 3.5512 Length Basis TL				Habitat and Feeding General Habitat(s) lacustrine Environment benthic Trophic Class invertivore Thermal Regime coldwater Habitat Preference cold bottom waters of the hypolimnion, on soft sediments in deep lakes; usually at depths between 60-150 m in the Great Lakes; preferred water temperature range 4-5°C Reproduction Reproductive Guild Guarders: Nest spawners: Lithophils Spawning Habitat(s) lacustrine Spawning Season summer-fall Spawning Month(s) August-October Spawning Temperature (°C) 4-7 Fecundity 165-1,187 Nursery Habitat(s) lacustrine Size and Age Adult Length (cm) 5.1-12.7 TL Adult Weight (kg) 0.001-0.029 Age at Maturity (yrs) 2 (m); 3 (f) Maximum Length (cm) 23.5 TL Maximum Weight (kg) 0.06 Lifespan (yrs) 5-10 Ontario Records Record Length (cm) 18.4 TL Record Weight (kg) none				Ontario Range Map Ontario Distribution Great Lakes (Superior, Huron, Ontario), Lake Nipigon, northwestern Ontario including Lake-of-the-Woods and a few widely scattered inland lakes in central Ontario Photographs Notes probable year-round spawning occurs in the Great Lakes; only larval fish reported from Lake Erie; Great Lakes individuals attain larger size than inland
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