BIOL108 Lecture Notes - Lecture 30: Lungless Salamander, Buccal Pumping, Salamander

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL108
• Professor: Lien Luong

Document Summary

Biol 108 - lecture #30 - class amphibia. Thin, permeable skin: sole site of gas exchange for some lungless salamanders. Buccal pump (similar to lungfishes) to inflate lungs: air drawn into the oral/throat cavity through the nostrils or mouth. Oral/throat cavity contracts to force air into lungs. Not fully adapted to life on land. Reproduction: some frogs take care off eggs or tadpoles. Carry them on back, mouth or stomach. Pouch prevents desiccation: some remain in the female reproductive tract and hatch as tiny froglets. Ovivoparous and viviparous reproduction is possible as well: avoiding predators. Diet: eat algae as larvae; eat invertebrates as adults, frog: tongue is long and sticky. Attached at the front of the mouth. Some pounce and stuff food into the mouth. Salamanders and newts: predators of invertebrates. Larvae have external gills (salamanders needs to live in the moist) Some become terrestrial, but needs a damp environment: salamanders. Less energetically efficient than positioning of legs beneath body.