A four-year study of 1,092 Nellore zebu bulls in Mato Grosso do Sul State, Brazil, analyzing the evolution of breeding soundness evaluation (BSE) scores and their relationship with herd pregnancy rates. The research was conducted by Gustavo Eduardo Freneau and observed a significant increase in BSE scores from 1994 to 1997. Data includes scores for sperm progressive motility, sperm morphology, and scrotal circumference, correlated with pregnancy outcomes from 157 bulls used in a breeding season.
Use Cases
- Modeling the relationship between breeding soundness evaluation (BSE) scores and pregnancy rates based on the described correlations.
- Analyzing temporal trends in bull fertility metrics like scrotal circumference and sperm morphology over a four-year period.
- Studying the reproductive performance of different bull BSE score categories ('a', 'b', 'c') across various female cattle groups.
Strengths
- Contains data from 1,092 bulls observed over four years, providing a longitudinal perspective.
- Reports specific BSE score increases, such as from 59.5 to 79.0 points between 1994 and 1997.
- Includes a quantified correlation (r=0.25) between BSE scores and pregnancy rate.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Last update date is unknown; freshness unverified.
Provenance
- Source
- Gustavo Eduardo Freneau
- Collection Method
- Clinical evaluation, scrotal circumference measurement, and semen collection by electro ejaculation with analysis of physical and morphological aspects.
- Time Range
- 1994 to 1997
- Geography
- Mato Grosso do Sul State, Brazil