Evaluación de los parámetros productivos y reproductivos de ovinos de la raza Katahdin

Abstract

The productive and reproductive parameters of Katahdin sheep were evaluated at Finca Alicia, Pastaza Province, during the period 2021-2022. A total of 46 ewes were used, from which records were collected based on: date of birth, date of first service, date of first lambing, date of mating, confirmed pregnancy, number of services, sex of the offspring, weight of the offspring. The statistical analysis of the production variable was calculated with the T-student test, significant differences were found (p <0.05) in the values of birth weight, weight gain at the second month and at weaning, these values being higher in 2022 compared to 2021. However, in the first month the highest weight gain was recorded in the year 2021. On the other hand, the reproduction parameter, using descriptive statistics, it was found that the average age at first lambing was 475.60 days, age at first service was 325.86 days, interval between lambing was 242.66 days, interval between lambing and conception was 84.86 days. The number of services per conception was 1.41 for primiparous ewes and 1.54 for multiparous ewes. The gestation period was 149.96 days for ewes and 145.33 days for ewes. In addition, a fecundity of 100%, a fertility of 93.33%, a prolificacy of 132.99%, a weaning percentage of 91.43% and a mortality of 9.15% in lambs are reported. It is recommended to pay attention to the nutrition, health and grazing of the flock to ensure adequate weight and optimal development of the ewes, in order to reduce the age at first service and first lambing.