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Lecture 11. September 19, 2008. Fish Friday #1

Lecture 11. September 19, 2008. Fish Friday #1 A. Osteoglossomorpha - Blake Bushman & Blake Ruebush B. Elopomorpha & Clupeomorpha Note - Please read the Grunbaum paper for Monday! We will discuss this in class. Elopomorpha. Elopomorpha. Leptocephalus larva. Elopomorpha.

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Lecture 11. September 19, 2008. Fish Friday #1

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  1. Lecture 11. September 19, 2008. Fish Friday #1 A. Osteoglossomorpha - Blake Bushman & Blake Ruebush B. Elopomorpha & Clupeomorpha Note - Please read the Grunbaum paper for Monday! We will discuss this in class.

  2. Elopomorpha

  3. Elopomorpha

  4. Leptocephalus larva

  5. Elopomorpha • Order Elopiformes - ladyfishes and tarpon

  6. Elopomorpha

  7. Anguilla rostrata American eel

  8. Gulper eels Garden or worm eels

  9. Elopomorpha • Order Anguilliformes- true eels • Family Muraenidae - moray eels carry ciguatera toxin

  10. Simenchelys parasiticus snubnose parasitic eel. parasitic fish living inside a shark heart

  11. Clupeomorpha Clupeiformes-herrings, anchovies, shads Clupeidae - shads & herrings Engraulidae - anchovies

  12. Clupeomorpha Clupeiformes-herrings, anchovies, shads

  13. Clupeomorpha Clupeidae-herrings, sardines, and shads

  14. Clupeomorpha Clupeidae-herrings, sardines, and shads • Illinois - Five species, two non-native • Found in large rivers, lakes, reservoirs Alosa Dorosoma

  15. Group Activity #1 -Draw the phylogenetic tree & distinguishing traits for: group a - Myxiniformes, Gnathostomata, Chondrichthyes, Osteichthyes group b - Petromyzontiformes, Elasmobranchii, Holocephali, Sarcopterygii, Actinopterygii group c - Elasmobranchii, Holocephali, Sarcopterygii, Actinopterygii group d - Myxiniformes, Petromyzontiformes, Chondrichthyes, Sarcopterygii

  16. Group Activity #3 - Design a dichotomous key that would allow one to distinguish these groups For example . . . Step 1 - lacks vertebrae --> Myxiniformes if not --> go to step 2 Step 2 - lacks jaws --> Petromyzontiformes if not --> go to step 3

  17. Review Questions 1. Describe the body shapes of tarpon, bonefish, eels, and gulper eels. What trait unites these seemingly disparate group of fish? 2. Describe the life-history of catadromous eels. What does it mean to be catadromous? 3. According to your book, why are tarpon (elopiforms) considered to be primitive teleosts? 4. Who are the clupeiforms? Where do they generally occur? Why are they important? Which clupeiforms occur in Illinois? 5. What does it mean to have an otophysic connection? What are the consequences of such a structure?

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