Análisis de parámetros reproductivos del criadero Jersey "Los Nevados" en los años 2022 y 2023

Abstract

The objective of this research was the analysis of the reproductive parameters of "Los Nevados" Jersey Breeding Farm, located in Pedro Moncayo Canton, Pichincha Province in the years 2022 and 2023. For the collection of reproductive parameters, the reproductive records of 41 females were used, while the farm's accounting books were used to obtain the reproductive costs. The comparison of reproductive parameters in the years evaluated was performed using the T-student Test. The results obtained did not present significant differences (p≥0.05), with means for the number of services per conception of 3.00 and 2.59; for calving interval - first service of 65.68 and 66.39 days; for calving interval - conception 130.80 and 129.34 days; for calving interval of 412.07 and 410.05 days; for estrus interval of 31.82 and 33.05 days; and for gestation period of 281.27 and 280.71 days in years 2022 and 2023 respectively. The reproductive costs presented a cost of the calf born of $132.27 and $121.99; a cost until the cow is pregnant of $41.99 and $38.48; a cost over 100 days open of $9.89 and $8.73; and a cost to cow gestation of $90.28 and $83.51 for years 2022 and 2023 respectively. It was concluded that the management given to the animals did not vary from one year to the other and that the variables, such as the number of services per conception, calving interval and estrus interval, are outside the ranges considered optimal, which causes economic losses in the cattle ranch. It was recommended that annual evaluations of the behavior of reproductive parameters be carried out, and that the personnel be continuously trained and discarding unproductive animals.