Relationship between progesterone and egg production in pheasants

Area of Science:

• Reproductive Endocrinology
• Avian Biology
• Biochemical Assays

Background:

• Progesterone plays a crucial role in avian reproductive cycles.
• Understanding progesterone's influence in pheasants can inform breeding practices.
• Previous research has established progesterone's importance in chickens and turkeys.

Purpose of the Study:

• To develop and validate a radioimmunoassay for quantifying progesterone concentrations in pheasant sera.
• To investigate the relationship between serum progesterone levels and egg production in female pheasants.
• To determine the role of progesterone in the sexual maturation and reproductive success of pheasants.

Main Methods:

• Development of a progesterone radioimmunoassay using specific antiserum and tested for cross-reactivity.
• Weekly collection of blood samples from 17-week-old to 1-year-old female pheasants.
• Measurement of serum progesterone concentrations and daily recording of individual hen egg production.

Main Results:

• The developed radioimmunoassay demonstrated good sensitivity and assay precision.
• Pre-sexual maturity progesterone levels were significantly lower compared to later ages.
• A significant positive correlation was observed between average progesterone concentration and average percent egg production per bird.

Conclusions:

• Progesterone concentration is a significant predictor of egg production variation in pheasants.
• The findings indicate progesterone is vital for egg production in pheasants, similar to other gallinaceous birds.
• This study provides valuable insights into the endocrinology of pheasant reproduction.