Abstract
Ninety-five deepwater sculpin, Myoxocephalus quadricornis thompsonii (Girard), sampled from Burchell Lake, Ontario, 12 October 1980, were up to 92 mm long. Ninety-eight percent of the specimens were less than 4 years old. Some 2-year-old males had enlarged testes; all older males and females had enlarged testes and eggs (mean diameter, 1.43 mm), respectively. Spawning probably occurs during late fall or winter.Parasites found included Diplostomulum sp. (metacercariae), Bothriocephalus sp. (immature), Cyathocephalus truncatus (nongravid), Cystidicola cristivomeri (third-stage larvae), and third-stage larvae of a spirurine nematode.
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