CAS Avian Reproduction & Breeding 3

Question 1

What term describes the hatching pattern where eggs in a clutch hatch at different times because incubation begins with the first egg laid?

Accepted Answer

Asynchronous hatching

Answer

Asynchronous hatching results from incubation beginning with the first egg laid, causing each egg to hatch at a different time and creating a size hierarchy among chicks.

Question 2

Pigeon and dove crop milk is primarily composed of:

Accepted Answer

Protein- and fat-rich secretions from the crop lining epithelium

Answer

Crop milk is produced by the sloughing of epithelial cells from the crop lining under prolactin stimulation, yielding a secretion rich in protein, fat, and immunoglobulins.

Question 3

When a breeding pair shows persistent aggression and attacks toward their own chicks, what is the most appropriate immediate intervention?

Accepted Answer

Remove the chicks for hand-rearing

Answer

When parent birds persistently attack chicks, the safest and most effective intervention is to remove the chicks immediately for hand-rearing to prevent serious injury or death.

Question 4

Which method allows assessment of egg fertility and embryo development without cracking open the egg?

Accepted Answer

Candling

Answer

Candling involves shining a bright, focused light through the eggshell in a darkened environment to visualize blood vessel development, embryo movement, and air cell size.

Question 5

A 'clear' egg discovered during candling at day 10 of incubation most likely indicates:

Accepted Answer

Either an infertile egg or very early embryonic death

Answer

A clear egg at day 10 can represent either an infertile egg or one where the embryo died very early (before visible structures formed), and both cannot be distinguished by candling alone.

(CAS) Certified Avian Specialist Practice Test

(CAS) Certified Avian Specialist Practice Test

CAS Avian Reproduction & Breeding 3