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Identification of Nongame Fishes Workshop Michigan AFS Lake Superior State University March 3-4, 2008 Presented by Kevin Wehrly Institute for Fisheries Research Michigan Department of Natural Resources and University of Michigan
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Acknowledgement All photographs were taken by John Lyons and accessed from www.WiscFish.com
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Percidae Darters
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Percid characteristics Two dorsal fins separated (except in ruffe), first spiny, second soft rayed Anal fin with 1-2 spines Spine on opercle Preopercle serrate
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Most common species Johnny darter Iowa darter Logperch
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Johnny darter Snout blunt Black W’s X’s and Y’s on body
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Iowa darter Snout sharp Red and brown blotches on side Strong teardrop under eye
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Logperch Conical snout 14 to 18 vertical bars on side Caudal spot
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Other fairly common species Blackside darter Fantail darter Rainbow darter Least darter Greenside darter
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Blackside darter Mouth sharp with broad frenum 6 to 9 black ovals on side Caudal spot
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Fantail darter Mouth sharp Short dorsal spines Tail rounded with cross bands 2 subspecies Barred fantail—has vertical bars, found in southern MI Striped fantail—has horizontal stripes, found in upper peninsula
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Rainbow darter Mouth sharp, frenum present 6 to 7 dark vertical bars on side Nearly encircle caudal peduncle Most of lower peninsula
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Least darter Mouth sharp Lateral line absent Males with enlarged pelvic fins A small darter found across most of the state—could be mistaken for johnny darter or iowa darter
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Greenside darter Snout blunt; frenum absent Green V’s on body Locally abundant in the southeastern lower peninsula
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Darters with restricted distributions Orangethroat darter—similar to rainbow Banded darter—similar to greenside Channel darter—similar to blackside River darter—similar to blackside Sand darter
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Orangethroat darter Very similar to rainbow darter Mouth sharp 4 to 5 dark vertical bars on side Do not encircle caudal peduncle A few locations in southeast MI
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Banded darter Similar to greenside darter but ranges are very different Snout blunt; frenum present 8 to 13 green bands on body Green Bay drainage in Menominee County
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Channel darter Snout blunt; no frenum Dark blotches on side Dark band a base and edge of spiny dorsal Endangered—Found in tribs and coastal areas of eastern lower peninsula
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River darter Snout blunt; frenum present Dark blotches near front and back of spiny dorsal Male with large anal fin Endangered—Found in tribs and coastal areas of eastern lower peninsula
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Sand darter Body elongate and translucent Belly scaleless and body imperfectly scaled 2 species Western sand darter—has spine on opercle, found in Green Bay Drainage UP Eastern sand darter—no spine on opercle, threatened, found in SE Michigan
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