Week10 - Phylum Chordata Subphylum Vertebrata Fishes...

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3/26/2010 1 Phylum Chordata Subphylum: Vertebrata Fishes Tetrapods Amphibians Salamanders (Caudata) Caecilians (Gymnophiona) Frogs (Anurans) Reptiles Birds mammals http://www.bishops.k12.nf.ca/wells/verts/mainpage.jpg Fishes Most diverse vertebrates ~24,000 described species, Less than half in FW 3,000 in Amazon, ~1,000 in N. America 3 major groups Jawless (lampreys, hag fish) Chondrichthyes (sharks and rays: Lake Nicaragua shark, bull shark) Osteoichthyes (bony fishes) http://www.christinacjones.com/wp-content/uploads/2007/06/bul -shark.jpg Fishes Obligate freshwater species Diadromous Catadromous : spawn in marine water (eels) Anadromous : spawn in freshwater (salmon, shad, alewife) http://www.wheelmeon.org/Chinook%20King%20Salmon.jpg http://pond.dnr.cornel .edu/nyfish/Anguil idae/american_eel.jpg http://www.frs-scotland.gov.uk/Uploads/Images/Eel.jpg www.eeliad.com
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3/26/2010 2 http://www.dfw.state.or.us/warm_water_fishing/images/Bluegill.gif http://pond.dnr.cornell.edu/nyfish/Esocidae/northern_pike.jpg http://pond.dnr.cornel .edu/nyfish/Acipenseridae/lake_sturgeon.jpg http://www.krisweb.com/krissheepscot/krisdb/photos/bw/alewife_photo.jpg What is a fish? http://www.chiangmai-chiangrai.com/images/1/14_popular_river_fishes_2.jpg http://www.onthewater.com/mm5/graphics/00000001/FWFishPosterLG.jpg Thailand freshwater fish What is a fish? Gills 2 paired fins Ectothermic (exceptions: billfishes, tunas, shortfin mako, long fin mako, white, porbeagle, salmon shark) Jaw Scales Lays eggs (internal or external fertilization) ht p:/ www.umesc.usgs.gov/aquatic/drug _research/images/vdawson_50025263.jp g ht p:/ inlinethumb34.webshots.com/43553/2256208680104181437S600x600Q85.jpg http://www.kentuckylake.com/fishing/fishfacts/pics/ext-anat.jpg
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3/26/2010 3 •Sensory adaptations: chemoreception •Sensory organs •lateral line •eyes •pit organs Fish species and habitats Although fish inhabit nearly every permanent water body, each species has its own distribution and range. The basic requirements for a fish’s survival include prey cover suitable water temperature DO levels http://s.ngeo.com/wpf/media-live/photos/000/002/cache/arapaima-diver_214_600x450.jpg http://www.nationalgeographic.com/field/pr ojects/megafishes.html © Mike Guerin/http://TheJump.Net ht p:/ www.flmnh.ufl.edu/fish/gal ery/Descript/Al igatorGar/Al igatorGar.html Fish species organized by trophic guild ht p:/ www.bio.txstate.edu/~tbonner/txfishes/ictiobus%20bubalus
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This note was uploaded on 11/14/2010 for the course NRM 2305 taught by Professor Staff during the Spring '08 term at Texas Tech.

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Week10 - Phylum Chordata Subphylum Vertebrata Fishes...

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