Poultry Judging Practice Test

What key factor can affect the hatchability of eggs?

1. Humidity

2. Temperature

3. Air flow

4. All of the above

The correct answer is: All of the above

Hatchability of eggs is influenced by several environmental factors, and all the options listed play a critical role. Humidity is crucial because it impacts the moisture content of the eggs; too high or too low humidity can lead to increased mortality during the incubation period or can cause abnormalities in chick development. Temperature is equally important, as the optimal incubation temperature (usually around 99.5°F for chicken eggs) ensures proper embryonic development. Variations in temperature can lead to poor hatch rates, as eggs may develop too quickly or too slowly. Air flow also significantly affects hatchability because adequate ventilation is necessary for proper gas exchange; embryos need oxygen to grow and produce carbon dioxide, which must be efficiently expelled. Given that all these factors work together to create a suitable environment for embryo development, it is clear why understanding and regulating them is essential for achieving high hatchability rates.