This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Taxonomy• Phylum Chordata
– Subphylum Cephalochordata- amphioxus or lancelet– Subphylum Urochordata- tunicates or sea squirts– Subphylum Vertebrata
• Class Agnatha- jawless and cartilaginous, hagfish and lamprey• Class Chondrichthyes- cartilaginous, sharks and rays• Class Osteichthyes- bony fish• Class Amphibia- cecilians, salamanders, frogs, toads• Class Reptilia- snakes, lizards, turtles, tortoises, alligators, crocodiles,
tuataras• Class Aves- birds• Class Mammalia- dogs, cats, lions, horses, cows, bears, giraffes,
Lamprey• Up to 24in. (60cm)• Anterior and posterior dorsal fin• Tail fin or caudal fin• Two eyes• Gill slits• Circular, funnel shaped mouth lined with rings of teeth• Attaches by suction, bores a hole, sucks blood and body fluids
Lamprey Life Cycle• Female digs a shallow depression in stream
bed and deposits eggs (25,000 to 100,000)• Males fertilize the eggs- external fertilization• In about 2 weeks the eggs hatch• Tiny wormlike larva burrow into muddy
bottom• Feeds on organic debris and develop for 3-7
Hagfish• Bottom dweller• Mainly eats dead animals• Small teeth for tearing and muscular sucking mouth• Eye spots• Slime glands secrete slime as a defense mechanism
Rays and Skates• Flat and thin rather than torpedo-shaped like the sharks• Pectoral fins form flat “wings”• Swimming motion is like a bird• Ventral mouth used to eat mollusks, small crustaceans, and to suck
up invertebrates• Stingray- type of ray with sharp, venom filled spine along its tail• Most rays and skates are less than 3.3ft. (1 m)• Manta ray “devilfish” sometimes more than 20ft. (6m)
River Monsters - Alien Fishhttp://www.youtube.com/watch?v=FMIN0XVKfPE