lecture 11. september 19, 2008. fish friday #1
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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. - PowerPoint PPT PresentationTRANSCRIPT
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 willdiscuss this in class.
Elopomorpha
Elopomorpha
Leptocephalus larva
Elopomorpha
• Order Elopiformes - ladyfishes and tarpon
Elopomorpha
Anguilla rostrataAmerican eel
Gulper eels
Garden or worm eels
Elopomorpha
• Order Anguilliformes- true eels
• Family Muraenidae - moray eels
carry ciguatera toxin
Simenchelys parasiticussnubnose parasitic eel.
parasitic fish living insidea shark heart
Clupeomorpha
Clupeiformes-herrings, anchovies, shads
Clupeidae - shads & herrings
Engraulidae - anchovies
Clupeomorpha
Clupeiformes-herrings, anchovies, shads
Clupeomorpha
Clupeidae-herrings, sardines, and shads
Clupeomorpha
Clupeidae-herrings, sardines, and shads
• Illinois - Five species, two non-native
• Found in large rivers, lakes, reservoirs
Alosa Dorosoma
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
Group Activity #3 - Design a dichotomous key that would allow one to distinguish these groups
For example . . .
Step 1 - lacks vertebrae --> Myxiniformesif not --> go to step 2
Step 2 - lacks jaws --> Petromyzontiformesif not --> go to step 3
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 primitiveteleosts?
4. Who are the clupeiforms? Where do they generally occur? Why are theyimportant? Which clupeiforms occur in Illinois?
5. What does it mean to have an otophysic connection? What are the consequencesof such a structure?