Topics:
Animal Refresher, Poultry Science
Most Critical Factor During Incubation
Most critical factor during incubation is:
- Temperature — Correct Answer
- Humidity
- Turning of egg
- None of these
Explanation:
Correct Answer: Temperature
Temperature is the most critical factor during incubation. Even small deviations from the optimal temperature can cause embryonic death or developmental abnormalities.
Optimal Incubation Temperatures
- First 18 days (Setter): 37.5°C (99.5°F) — or 37.6°C per some references
- Last 3 days (Hatcher): 37.2°C (99°F)
Effects of Temperature Deviation
- Too high temperature: Early embryonic death; malformations
- Too low temperature: Delayed development; dead-in-shell
- The physiological zero (temperature at which embryonic growth is arrested) = 21.1°C (70°F)
Other factors (humidity, turning, ventilation) are also important but temperature deviations are most immediately fatal to embryos.
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This multiple choice question is from Animal Refresher, Poultry Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
