Journal
CANADIAN FIELD-NATURALIST
Volume 118, Issue 3, Pages 318-325Publisher
OTTAWA FIELD-NATURALISTS CLUB
DOI: 10.22621/cfn.v118i3.8
Keywords
Round Goby; Neogobius melanostomus; St. Clair aquatic ecosystem; age-0; morphometry; habitat; Ontario
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Early developmental stages and ecotone utilisation of the non-indigenous Round Goby, Neogobius melanostomus (Pallas, 1811), are described and illustrated. Fish (5-40 mm) were collected in coarse gravel, rocks and debris in the St. Clair River/Lake system, Ontario, in 1994-2000. The Round Goby hatches at about 5 turn with black eyes, flexed urostyle, and developed fins and digestive system. Distinguishing characters include large head, dorsolateral eyes, large fan-shaped pectoral fins, two dorsal fins, fused thoracic pelvic fins and a distinct black spot on the posterior of the spinous dorsal fin. Modal counts for preanal, postanal, and total myorneres were 12, 19, and 3 1, respectively.
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