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(pharyngeal gill slits, dorsal nerve chord, post-anal tail, notochord) |
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hagfishes (sometimes subphylum ; lacks true vertebrae) |
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subclass Elasmobranchii (9 Orders) |
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(~ 700-800 sp)sharks, skates, rays |
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(~ 35) ratfishes, chimaeras |
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Grade Osteichthyes (Teleostomi) |
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Grade Osteichthyes (Teleostomi) |
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(~36) Bichirs, reedfish, sturgeons, paddlefishes |
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gars, bowfin, modern bony fishes (~21,000) |
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countable structures (body segments, scales, cephalic pores, fin rays, vertebrae, etc…) |
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measurable structures (fins, head, tail, eye diameter) |
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holding prey; small pad-like; arranged like a wool card(catfish, perch) |
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taller pads; small & fine(needlefish) |
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doglike; piercing and holding (pike, walleye, viperfish, snapper) |
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crushing and grinding (drums, rays) |
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sharp edge; cutting (chimaera) |
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– taking bites (piranha, shark) |
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– in throat (carp, sucker) |
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Quick bursts of speed Contracts quickly (also fatigues quickly) |
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Sustained swimming Contracts slowly (hard to fatigue) |
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Used in sustained swimming Recruited after red, but before white |
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Yellow Muscle is comparable to... |
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to red muscle!@ - Antarctic family of fishes |
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