First and second cycle egg production characteristics in commercial table egg flocks

Area of Science:

• Poultry Science
• Animal Science
• Agricultural Science

Background:

• Commercial table egg layer flocks undergo multiple production cycles.
• Understanding egg production curves is crucial for optimizing flock management and profitability.
• Factors such as strain, season, and molting influence egg production efficiency.

Purpose of the Study:

• To analyze the shape of egg production curves in commercial table egg layers.
• To investigate the relationship between first and second production cycles.
• To determine the effects of strain and season on egg production traits.

Main Methods:

• Analysis of egg production data from 1,231 first-cycle and 887 second-cycle flocks.
• Calculation of peak production, slopes of decline, and end-of-cycle production levels.
• Statistical evaluation of nonlinearity and the influence of season and strain.

Main Results:

• Egg production curves were nonlinear, with accelerated declines in the final 10 weeks of each cycle.
• Peak production means were 89.1% (first cycle) and 80.0% (second cycle).
• Significant variations in production traits were observed among White Leghorn strains, influenced by season.

Conclusions:

• Egg production curves exhibit nonlinearity, particularly in later stages of lay and post-molt.
• Seasonal effects are significant, with specific hatching times influencing production patterns.
• Strain differences play a role in egg production, though some slopes were consistent across strains.