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The use of heat detection aids in estrus synchronization programs
R G Elmore1, A A Aderibigbe, H A Garverick
1Department of Veterinary Medicine and Surgery University of Missouri-Columbia Columbia, Missouri 65211 USA.
Theriogenology
|August 1, 1986
Summary
Estrus detection aids like tailhead paste and chin-ball markers showed inaccuracies in synchronized beef cows. These tools are helpful but not fully reliable for identifying cows in estrus within a group.
Area of Science:
- Animal Science
- Reproductive Biology
- Veterinary Medicine
Background:
- Estrus detection is crucial for artificial insemination success in beef cattle.
- Estrus synchronization protocols are widely used to manage breeding in beef herds.
- Accurate estrus detection aids are essential for maximizing the efficiency of synchronization programs.
Purpose of the Study:
- To evaluate the efficacy of tailhead paste and chin-ball markers for estrus detection in synchronized beef cows.
- To compare the accuracy of these two common estrus detection methods.
Main Methods:
- Estrus synchronization of 85 beef cows using a two-injection prostaglandin analogue program.
- Application of tailhead paste and introduction of bulls with chin-ball markers after the second injection.
- Monitoring estrus activity and collecting blood samples for plasma progesterone assays.
Main Results:
- Tailhead paste incorrectly indicated estrus in 27% of cases.
- Chin-ball markers showed an inaccuracy rate of 24% in detecting estrus.
- Progesterone assays confirmed significant discrepancies between observed estrus and actual reproductive status.
Conclusions:
- Both tailhead paste and chin-ball markers exhibit limitations in accurately detecting estrus in synchronized beef cows.
- Estrus detection remains challenging in groups of synchronized cattle, even with the use of these aids.
- Further research may be needed to improve the reliability of estrus detection technologies in beef cattle breeding programs.
