6-HOF2_2015 post - History of Fishes 2: Jaws Lecture 6: Ch....

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History of Fishes 2: JawsLecture 6: Ch. 8; 11 DOF
Upcoming DatesOct 2-4 weekend trip to Grand Isle. Leave at 1 pmfrom classroom on Friday, come back early SundayLet me know by next Wednesday if you are in or out(everyone if responsible for knowing the species wecollect)Night fishing hook and line, boat trawling, beachseining, etc.Assignment 1 due today!October 12 midterm
Pics AvailableCLEAN FISH PICS with notesField picsnafishes
HagfishAnti-predator slime, 40secep00131/extref/srep00131-s1.mov
Muddiest pointsNotochord– structural element, ultimatelybecomesthe vertebral column, persists throughoutlife in early chordates as structural element, butgenerally embryonic structure of the backboneDorsal hollow nerve cord– ultimately becomesspinal cord, other elements of central nervoussystem/brain
Muddiest pointsSemicircular canals– elements of inner ear thathouse otoliths and hair cells; needed for balance,hagfish have 1, lamprey 2, gnathostomes 3Dermal bone– does not form from cartilageprecursor like endochondral bone, much of skull isdermalHypocercal tail

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Term
Fall
Professor
Chakrabarty
Tags
Ichthyology, Jaws, Agnatha, Gnathostomata, Jawless Fishes

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