Comportamiento de la fertilidad y distribución de los partos en fincas ganaderas con servicio de monta natural

The objective of this research was to analyze fertility and calving distribution on livestock farms in Santa Rita Parish that use natural mating services. To this end, a descriptive and analytical study was conducted, combining quantitative and qualitative approaches, based on reproductive records collected over the course of one year on five farms selected for their reproductive management and grazing conditions. Four key variables were evaluated: fertility rate, calving distribution, service seasonality, and sex ratio. The sample included 648 multiparous cows, whose data were analyzed using frequency and percentage analysis. The findings revealed an average fertility rate of 51%, with variations ranging from 38.18% to 61.9% depending on the farm. Most calvings occurred between June and November (63%), peaking in September (17.74%). Similarly, the highest number of mating services was recorded between September and February (63%), with December being the most active month (17.74%). Regarding the sex ratio, 55% of births were male and 45% female. However, no statistically significant differences were found in any of the evaluated variables (p > 0.05). Fertility on the evaluated farms showed homogeneous behavior, with seasonal calving distribution and service periods influenced by environmental factors, and a slight trend toward male births, possibly linked to natural reproductive patterns.

• Hlavní autor: Cedeño Ibarra, Alexander (author)
• Další autoři: Salazar Espinoza, Aiko Anahí (author)
• Médium: bachelorThesis
• Jazyk: spa
• Vydáno: 2025
• Témata: Bovine reproduction; Livestock management; Reproductive seasonality; Productive parameters.
• On-line přístup: http://repositorio.espam.edu.ec/handle/42000/2757