Avain Reproduction Flashcards
Do males bird have penis?
No the cloaca is an internal chamber the ends in an opening
Do female birds have a vagina?
The same opening and has dual functional and it is the exit point for both urine and digestive waste.
How do birds typically mate?
With the female squat bellow the male who sits one top.
What happens at happens to the cloacal opening doing mating season?
It swell so slightly outside the body
What happens to the sperm after it leaves the male cloaca?
Deposited into the female cloaca traveling along the oviduct then fertilises the egg.
What do they do to increase the chance of fertilisation?
By mating many times throughout the mating period
What happens in the seminiferous tubules?
Sites of sperm production
What happens in cells of leydig?
Testosterone production
What is the temperature like inside the body ?
High
What is natural selection?
Individual organisms with favourable traits are more likely to survive than those with unfavourable traits.
What is natural selection?
Depends on the success of individual in relation to the general environmental conditions it faces through life.
What is a direct benefit of choosing certain males?
-territory quality/ access to resources
-protection
What are some indirect benefits of choosing certain makes?
-good genes
What does monogamy mean?
A single male and female can be for a part of whole of breeding season.
What does polygyny mean?
1 male and many female
What does polyandry mean?
1 female and many males
What does continuos breeders mean?
These are birds that breed all year round
What are environmental conditions that trigger breeding ?
- appropriate light
- temperature
- humidity
What does FSH stand for?
Follicle stimulating hormone
What does LH stand for ?
Luteinising hormone
What does FSH do?
Helps normal ovarian follicular growth
What is released when the follicle?
Oestrous and progesterone
