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Identification of Nongame Fishes Workshop
Michigan AFSLake Superior State University
March 3-4, 2008
Presented by Kevin WehrlyInstitute for Fisheries Research
Michigan Department of Natural Resources andUniversity 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 bodyimperfectly scaled
2 speciesWestern sand darter—has spine on opercle, found in Green Bay Drainage UPEastern sand darter—no spine on opercle, threatened, found in SE Michigan