Comportamiento durante el calor y dinámica folicular interestral en vacas BON (Blanco Orejinegro)

ABSTRACT: The Colombian criollo cattle are at risk of extinction. One of these breeds, the BON (Blanco Orejinegro: White black-eared) is characterized by its resilience in spite of the rough managerial practices to which it is usually subjected; additionally it is said that these animals are resistant to diseases such as FMD, which has been corroborated in vitro and associated with the capacity of the cells to produce type I Interferon. We are interested in the propagation and the preservation of this breed through biotechnological methods, which requires a broad and deep knowledge of their reproductive physiology and behavior. The objective of this project was to characterize its follicular dynamics and the estral behavior. Using seven non-lactating regularly cycling cows with 2-7 previous parturitions. These animals were under traditional management, grazing on Cynodon nlefuensis, Brachiaria decumbens and native grasses. Daily ultrasonography was practiced during two consecutive cycles for each cow and 30 minute observation intervals thrice a day were carried out at 7am, 2 pm and 5pm. Cohorts of follicles were detected starting at 3 mm, with growth rates of 0,04 mm/day up to the moment of divergence. After this moment the growth rate of the subordinate follicles was 1,1 and that of the ovolulatory follicle changed from 13.5 to 17.6 mm. The interval between ovulations was 23-25 days and the number of follicular waves was 3 or 4 with a dominance of 3-6 days.

• Autores: Henao Pineda, Damary Wbelis; Carrillo Bonilla, Lina María; Olivera Ángel, Martha
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2004
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: spa
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/7295
• Acceso en línea: http://hdl.handle.net/10495/7295
• Palabra clave: Biotecnología animal; Fisiología de la reproducción; Ganado blanco orejinegro; Ondas foliculares; Estro; Fase folicular
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-nc-sa/2.5/co/