BIOLOGY 2A03 Lecture 9: Guest Lecture 1 - Physiology of Diving Mammals
24 Mar 2016
School
Department
Course
Professor
Document Summary
Whats diferent about a diving mammal: they don"t have gills they"re holding their breath under water, prolonged length of breath hold unique physiology. 3 families but focus on sea lions and seals. Seals sill have funcional units and auditory units, just not as efecive as a sea lion which can funnel sound in with pinnae. Seals move around like worms unable to walk on all 4s like a sea lion. Sea lions rely on large chest muscle to propel themselves when they"re underwater, while a seal relies on a muscle on their back swims on their side vs sea lions which swim like us. Sea lions no fur under fore lippers tend to be on rocky clifs, where no fur is an advantage for grip. When they"re underwater, they perform the most exercise: really good at holding breath for long periods of ime, while exercising during that.
