Lecture 11. September 19, 2008. Fish Friday #1 A. Osteoglossomorpha - Blake Bushman & Blake Ruebush B. Elopomorpha & Clupeomorpha Note - Please read the.

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Presentation transcript:

Lecture 11. September 19, 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

Leptocephalus larva

Elopomorpha Order Elopiformes - ladyfishes and tarpon

Elopomorpha

Anguilla rostrata American eel

Gulper eels Garden or worm eels

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

Simenchelys parasiticus snubnose parasitic eel. parasitic fish living inside a 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 --> Myxiniformes if not --> go to step 2 Step 2 - lacks jaws --> Petromyzontiformes if 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 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?