ZOOL 462A Lecture Notes - Lecture 11: Glycogen
Document Summary
Molting shedding of feathers and replacing with new feathers. Plumage a generation of feathers (birds may have multi plumages at any given time. 5 plumages: natal fluffy goslings, juvenile less colorful, similar look to hen, basic adults, hen resembling, help to hide, alternative breeding plumage - colorful, supplemental 3rd adult generation some, not all. Non-breeding activities have evolved to provide the basic needs of waterfowl: Energy availability is the limiting factor outside the breeding season. Nutrient acquisition: energy immediate use and storage for use during migration, protein growth, glycogen for brain activity, vitamins, minerals. Water: need an open water source eventually. Shelter: avoid predators and harsh weather, stress from harsh weather may make susceptible to disease. Nutrient acquisition: energy immediate use and storage (fat) for use during severe weather events or during migration to harsh weather. Reserves often used an indication of habitat condition, maintain now just in case they are not good later.
