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November 7, 2008 - Fish Friday

November 7, 2008 - Fish Friday Notes: Please read the Goodman paper for Monday. It is on the web. Guest speaker, Chris Cheng, will be talking about how fish survive in cold water. Scorpaeniformes. Rockfishes, scorpionfishes, sculpins, lumpfishes, many other common names

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November 7, 2008 - Fish Friday

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  1. November 7, 2008 - Fish Friday Notes: Please read the Goodman paper for Monday. It is on the web. Guest speaker, Chris Cheng, will be talking about how fish survive in cold water.

  2. Scorpaeniformes • Rockfishes, scorpionfishes, sculpins, lumpfishes, many other common names • 24 families, 1300 species • Mostly shallow water, marine • All possess a suborbital stay

  3. rockfishes, scorpionfishes, lionfish & stonefish - strong venom in spines - internal fertilization - viviparous young - rockfishes can be quite old -- oldest fish was 205 years old -- others between 100-160 years -- most don’t live that long, but 20-50 year old fish not uncommon rockfish scorpionfish

  4. Scorpaeniformes rockfish scorpionfish lionfish stonefish

  5. Scorpionfish Video http://www.youtube.com/watch?v=Uf-8JZ3Rz2A http://www.youtube.com/watch?v=v9_9_5i1ndU

  6. searobins & gurnards searobins gurnard very large pectoral fins - probe the bottom and rest on them - large, muscular swimbladder for sound production - bottom dwellers

  7. Flying Gurnard

  8. Flying Gurnard Video http://www.youtube.com/watch?v=GAEqXGbYqQU

  9. Scorpaeniformes Cottidae - one of three freshwater families in order, found North America, Europe, and Asia - males provide parental care >300 species in the family -lack a swimbladder -large pectoral fins -sit on bottom -like the current or areas with high turbulence Cottidae - two species found in Illinois streams

  10. Jeff and the Catch Sculpin from Bering Sea

  11. Synbranchiformes - swamp eels & spiny eels

  12. Swamp eels • 15 species • Fresh & brackish waters of Africa, Asia, Australia, & S.A. • Pectoral fins only present in larval stages • Dorsal and anal fins as small folds • Caudal fin small or absent • Breathe air • Protogynous hermaphrodites (female then male) • Some move across land, others burrow holes in banks • Introduced in U.S. from Asian food markets

  13. swamp eel

  14. Multiple Introductions of Swamp Eels in SE United States Tampa N. Miami Homestead 1 Homestead 2 Atlanta

  15. Swamp Eel Video http://www.youtube.com/watch?v=fvJyBT-z2Ec

  16. Review Questions 1. What character unites the Scorpaeniformes? How old is the oldest documented teleost? What type of fish was the oldest documented teleost? Explain the reproductive biology of Scorpaneiforms. 2. What is unique about the sea robins and flying gurnards? Do flying gurnards really fly? 3. Which members of Scorpaneiformes can be found in freshwater? 4. Why have swamp eels had a negative effect on areas where they have been introduced? Why were they introduced? Give 3 reasons why swamp eels are so difficult to eradicate. How many species of swamp eel have been introduced into the US? Has there just been a single introduction or have there been multiple introductions? What is the evidence for this? 5. Describe the fin morphology of swamp eels.

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