Reproduction Flashcards
Why do birds space out activities throughout the year
Birds are very energy expensive
Flying, raising young, molting, heavy gonads for mating, etc
Sex determination
Female
ZW
Heterogametic
Sex determination
Male
ZZ
Homogametic
Sperm and eggs are produced
Seasonally, gonads enlarge during breeding season
Only L Ovary Functions
Sperm stored in cloacal protuberance
Testosterone compromises
immune system
Egg Production/Cycle
Immature ova mature at ovulation
Ova travels to infundibulum via fibria
Fertilization occurs in the infundibulum
Moves to magnum(ampulla)
Move to isthmus, beginning egg shell
Egg shell solidifies and colors in uterus
How is the reproductive system adapted for flight
Gonads enlarge/fertile during breeding season
Egg outside body- lighter
Cuticle
Each layer that keeps water in the egg
Air cell forms between
Inner and outer shell membranes
Chalaza
Keeps blastodisc on top
Layers of albumen
Provide water
Yolk
Provides nutrients, energy, water
Bastodisk
Becomes chick
Eggs have what kind of shells
Calcium carbonate
Keystone arch
