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Identification of Nongame Fishes Workshop

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. Acknowledgement.

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Identification of Nongame Fishes Workshop

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  1. 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

  2. Acknowledgement All photographs, unless otherwise noted, were taken by John Lyons and accessed from www.WiscFish.com

  3. Exotics and Natives Established exotics, potentially invasive species, and their native look-alikes

  4. Exotics • Alewife—established in Michigan • Common Carp and goldfish—established in Michigan • Asian and grass carps—not established in Michigan • Smelt—established in Michigan • 3 spine Stickleback—established in Michigan • Goby—established in Michigan • Ruffe—established in Michigan • Cichlids—occasionally found but not established in Michigan • Snakehead—not established in Michigan

  5. Alewifeexotic • Saw-tooth keel on belly • Mouth upturned • Native look-alike—gizzard shad

  6. Gizzard shadnative • Saw-tooth keel on belly • Mouth subterminal, blunt snout • Last dorsal fin ray elongated • Exotic look-alike—alewife

  7. Common carp and goldfishexotic • Only minnows with serrated spine in dorsal and anal fins • Native look-alike—may appear similar to buffaloes

  8. Common carp Mouth horizontal 2 fleshy barbels Goldfish Mouth oblique No barbels Common carp and goldfishexotic

  9. Silver and bighead carpexotic • Large upturned mouth • Eyes forward, below midline • Scaleless keel on all or part of belly • Not established in Michigan

  10. Grass carpexotic • Blunt head, mouth smaller • Large scales with dark edges • No keel and no spines • Not established in Michigan

  11. Smeltexotic • Teeth on jaws and tongue • Adipose fin • Minnows lack teeth and adipose fin • Established in Michigan

  12. Threespine sticklebackexotic • Three dorsal spines • Established in Michigan • Two native stickleback species

  13. Ninespine stickleback 9 dorsal spines Brook stickleback 5 dorsal spines Threespine sticklebackNative

  14. Ruffeexotic • Perch-like body • Spiny and soft dorsal fins joined • Rows of dark spots in dorsal fin • Established in Michigan • No native percid has joined dorsal fins

  15. Gobyexotic • Pelvic fins fused to form disc • 2 species • Round goby—black spot in 1st dorsal fin • Tubenose goby—Tubelike projection from nostril • May appear similar to native sculpins • Established in Michigan

  16. Sculpinsnative • Pelvic fins separated • Large head with spine on each side • 2 dorsal fins separated • Scaleless • 4 species • Mottled—4 pelvic rays • Slimy—3 pelvic rays • Spoonhead—spoon-shaped head • Deepwater—4 preopercular spines • Exotic look-alike—goby

  17. Cichlidexotic • Sunfish like body • Lateral line interrupted • Occasionally found in Michigan but no reproducing populations

  18. Snakeheadexotic • Large scales on head • Single large dorsal fin • Large anal fin • Jaws with well developed teeth • Not established in Michigan • May be confused with native bowfin or burbot

  19. Bowfinnative • Gular plate • Pelvic fins at midpoint of body • Short anal fin • Exotic look-alike—snakehead

  20. Pelvic fins at midpoint of body Gular plate Short anal fin Bowfin Snakehead Long anal fin Pelvic fins under pectoral fins No gular plate

  21. Burbotnative • 2 dorsal fins • A single chin barbel • Exotic look-alike—snakehead

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