Importance of Eggshell Temperature Checking and Record Keeping in a Commercial Poultry Hatchery
Introduction
In modern commercial hatcheries, incubation management is not only limited to controlling the machine’s air temperature but also focuses on the biological temperature of the embryo itself.
One of the most reliable and practical indicators of embryo health and metabolic activity during incubation is the eggshell temperature.
Monitoring and recording eggshell temperature give real time insights into the embryo’s metabolic activity and the actual microclimate inside the egg.
Proper eggshell temperature management is a key factor in achieving:
- High hatchability
- Uniform embryo development
- Excellent chick quality
What is eggshell temperature and why it matters?
Represents the actual micro-environment of the embryo in the incubator. While the air temperature or set point on the machine gives an estimate of the incubator’s climate, it does not always represent the exact thermal condition of each egg.
- As they grow especially after 10 days incubation embryos produce metabolic heat. The temperature of the eggshell may rise above the ideal range if the incubators airflow or cooling system is unable to efficiently dissipate this heat.
- On the other hand, inadequate warming or overcooling can lower embryo metabolism and delay development.
Maintaining the correct temperature ensures that:
- Embryo metabolism progresses at ideal rate.
- Trays and trolleys all have uniform hatches.
- The risk of overheating, late mortality or poor chick quality is minimized.
Optimal temperature range
Research and field experience have shown that the ideal eggshell temperature for chicken embryos is typically between 37.8°C and 38.2°C (100-100.8°F).
Deviations outside this range can have direct biological impacts:
Procedure of checking:
- Ensure the infrared thermometer is properly calibrated and clean.
- Open the incubator door only for the minimum time necessary to avoid temperature fluctuation.
- Select representative eggs from top, middle and bottom trays of the trolley.
- Hold the thermometer approximately 3-5 cm away from the eggshell surface (for infrared thermometer and by Braun thermometer touch the eggshell).
- Aim at the equator (side surface) of the egg, not the pointed or blunt end.
- Wait for the thermometer to stabilize (typically 1-2 sec) and record the reading.
- Document the reading immediately in the eggshell temperature record sheet with the following details:
- Date of time
- Machine number
- Flock number and age
- Position
- Average eggshell temperature
- Air temperature (set point & display actual)
- Relative humidity
- Incubation days
Temperature monitoring using the OvoScan system in commercial hatcheries
The OvoScan system developed by Petersime, is one of the most advanced technologies that continuously monitors and controls the eggshell temperature in real time during incubation.
Unlike traditional systems that maintain air temperature, OvoScan regulates the embryos actual temperature, ensuring that all eggs in the machine experience the optimal thermal environment for uniform development and maximum chick quality.
Principle of operation:
- Sensors are placed in direct contact with eggshell at multiple positions within the setter.
- These sensors continuously measure the surface temperature of the eggshell which reflects the embryo metabolic heat.
- The readings are transmitted to the Petersime control computer.
- The system automatically adjusts the incubator air temperature and cooling system to maintain the desired temperature, typically around 37.8°C (100°F).
Advantages of OvoScan based eggshell temperature control:
Importance of record keeping
Recording eggshell temperature data whether measured manually or via OvoScan, it provides a foundation for data driven hatchery management.
Accurate record keeping enables hatchery managers to:
- Identify trends and compare machine performance.
- Detect early signs of imbalance in temperature or airflow.
- Correlate temperature data with hatchability and chick yield.
- Support calibration, maintenance and performance audit.
Linking to chick quality
Chick hatched from eggs maintained within the optimal eggshell temperature range exhibit:
- Uniform hatch window
- Well closed navels
- Better chick yield
- Higher first week survival and livability
Thus, eggshell temperature management is not just a measurement, it is a quality assurance process directly influencing farm performance.
Conclusion
- Eggshell temperature checking is the most direct and reliable indicator of embryo well-being and incubator performance.
- By focusing on the embryo’s actual experience rather than relying solely on machine readings, hatcheries can enhance both biological efficiency and economic return which is the ultimate goal of modern poultry hatcheries.
