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THE RATE OF GROWTH OF THE DOMESTIC FOWL.
1University of Missouri Agricultural Experiment Station, Columbia.
The Journal of General Physiology
|October 30, 2009
Summary
The domestic fowl
Area of Science:
- Comparative biology
- Developmental biology
- Animal science
Background:
- The growth patterns of domestic fowl (Gallus gallus domesticus) are complex and warrant detailed investigation.
- Understanding avian growth cycles can provide insights into comparative developmental biology.
Purpose of the Study:
- To analyze the cyclical nature of domestic fowl growth.
- To compare avian embryonic and postembryonic growth phases with mammalian models.
- To mathematically model the velocity curves of avian growth cycles.
Main Methods:
- Analysis of growth data to identify cyclical patterns and maxima.
- Comparison of domestic fowl growth stages with those of mammals (guinea pig, mouse).
- Application of autocatalytic monomolecular reaction equations to describe growth velocity.
Main Results:
- Domestic fowl growth comprises three to four distinct cycles, including embryonic and postembryonic phases.
- Embryonic growth maxima occur at 11-12 and 15-16 days; postembryonic maxima are observed around 8 and 18 weeks.
- Hatching timing aligns with the second or third growth cycle, similar to guinea pigs.
- Growth velocity curves for each cycle follow an autocatalytic monomolecular reaction pattern.
Conclusions:
- Domestic fowl growth exhibits a cyclical pattern analogous to mammalian development.
- The mathematical model accurately represents the velocity dynamics of avian growth cycles.
- This study provides a quantitative framework for understanding avian growth and development.
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