ENVIRONMENTAL FACTORS THAT AFFECT THE AGE OF FIRST CALVING AND CALVING INTERVAL IN COWS UNDER THE DOUBLE-PURPOSE SYSTEM
Journal Title: Revista MVZ Cordoba - Year 2009, Vol 14, Issue 1
Abstract
Objective. To determinate the factors that influence the age at first calving (AFC) and first calving interval (FCI) in female cows under the double purpose system on the farm “Rodeo”, municipality of Magangué, Bolivar, Colombia. Materials and Methods. Using 379 dates from production records between 1993 and 2002, we applied the GLM program of the Statistical Analysis System (SAS, 2001) to determine the mean and the standard deviation for each source of variance. The analysis considered the effects year, season, age at first calving (this was not considered for AFC), gender and weight at 24 months. Results. The mean for AFC and FCI were of 38.9 ± 3.9 months and 469.2 ± 9 days, respectively, and the effect of season of calving had a significant affect on FCI. Gender, weight at 24 months and season were not significant on AFC. Year, age at first calving, gender and weight at 24 months had no significant affect on FCI. Conclusions. The AFC and FCI were affected by the year of calving and season of calving, respectively.
Authors and Affiliations
Oscar Vergara G, Ph. D *| Universidad de Córdoba, Facultad de Medicina Veterinaria y Zootecnia, Grupo de Reproducción Animal, Montería Colombia.Correspondencia: overgara@sinu.unicordoba.edu.co, Luz Botero A, Zoot| Universidad de Sucre, Facultad de Ciencias Agropecuarias, Grupo en Biodiversidad Tropical, Sincelejo Colombia., Caty Martínez B, Bióloga| Universidad de Sucre, Facultad de Ciencias Agropecuarias, Grupo en Biodiversidad Tropical, Sincelejo Colombia.
Keywords
Related Articles
- EP ID EP3118
- DOI -
- Views 345
- Downloads 19
Effect of gonadotropins on the maturation and embryo development of bovine oocytes cultured in vitro
Objective. To evaluate the effect of FSH and LH on the maturation rates, fertilization and embryo development in vitro. Materials and methods. 1309 oocytes were used slaughterhouse ovaries, where the basal medium was TCM...
Canine Leishmaniosis: tools for diagnosis in veterinary practice in Colombia
The objective of this article is to perform a critical analysis and guide veterinarians in the management of canine Leishmaniosis. A systematic literature review was performed between 2005 and 2014 including scientific p...
SEROPREVALENCIA OF BOVINE LEUKEMIA VIRUS IN ANIMALS WITH REPRODUCTIVE PROBLEMS IN MONTERIA
Objective. To determine the seroprevalence of bovine leukemia virus (BLV) in animals with reproductive problems. Materials and methods. Blood samples were collected from 137 cows with a history of infertility, belonging...
Evaluation of three protocols for hormonal induction of spermiation in yaque Leiarius marmoratus
Objective. To assess the effects of hormonal induction using pituitary carp extract (PCE) and sGnRHa + domperidone (OVA) on the release of seminal fluid and its characteristics. Materials and methods. Treatments were: T1...
Interpretation of doxycycline+chloroquine dual therapy for A. phagocytophilum infection in dogs
Objective. A. phagocytophilum, an obligate intracellular pathogen, is a well-known agent causing granulocytic infections in both animals and humans. The purpose of the present study was to describe clinical course and co...