Valoración fenotípica y reproductiva de la ganadería "Brown Swiss Jr" en la parroquia Chiguaza, cantón Huamboya

Abstract

The aim of this research was to evaluate the phenotypic and reproductive aptitudes of the Brown Swiss breed of the "Criadero Brown Swiss Jr." cattle ranch, located in a place called “Purísima,” in Chiguaza parish, belonging to Huamboya canton, where 23 females in a reproductive state distributed by age were used. The measurements of zoometric parameters were taken with the use of the zoometric cane and bovine-metric tape. The reproductive parameters were based on the records presented by the owner of the cattle ranch. These values were classified, analyzed and interpreted using descriptive statistics and analysis of variance (ANOVA). Head length, height at withers, thoracic perimeter, total length, height at rump, rump length, anterior rump width, posterior rump width were: 52.88 ± 6.56cm; 132.83 ± 14.21cm; 170.42 ± 34.66cm; 149.00 ± 24.04cm; 136.04 ± 15.18cm; 50.46 ± 7.44cm; 51.54 ± 11.33cm; 24.08 ± 9.30cm, respectively. The mean age of the herd was 52.88 ± 44.72 months. Regarding reproductive parameters, the mean values obtained were: age at first service 25.31 months, age at first calving 43.14 months, pregnancy rate 50.00 %, calving interval 557.18 days, days open 323.23 days, services per conception 2.05 services. It is concluded that zoomometric measurements vary according to age, environmental conditions and genetic influence of their ancestors. The genetic value also had a broad relationship with the selection of the characteristics that parents inherit to their offspring, however, also the effect-environment, health and technical management are the main factors that exert pressure on the reproductive system of the livestock.