EEB384H1 Study Guide - Final Guide: Mandibular Symphysis, Mata Mata, Spermatophore
Document Summary
Challenges: water is viscous so when an object moves in water, water displaces water in its path displacement of water means displacement of food item. Three mechanisms: minimize displacement: crocodylians specialize on aq. prey with long and narrow snouts and long thin teeth. Swing jaw to the side when feeding under water *speed-faster movement. Alligator snapping turtles lure prey into the mouth with a worm-like appendage on tongue: sucion feeding: rather than ight the viscosity of water, use it to capture prey. Feeding sequence: (1) mouth opens (2) loor of buccopharyngeal cavity drops in front-to-back fashion, drawing water in (3) mouth closes (4) loor of buccopharyngeal cavity raises and water is expelled through gills or lips. Inerial sucion: greatly expand buccopharyngeal cavity to draw in water and the prey item suspended in it. Salamanders, frogs, some turtles, larval salamanders, and caecilians. Mata mata turtle video: compensatory sucion: buccopharyngeal expansion makes up for water displaced by head extension and jaw closing.