Prediction of live weight in bovine cattle from body measures.
DOI:
https://doi.org/10.15517/am.v7i2.24764Abstract
This study took place in a cattle ranch working with double-purpose cattle, in the Department of Jutiapa, Guatemala, with the objective of calibrating a model of cattle measuring tape, with body measures, during the months of April, May and July, 1993. The measures were taken from 456 cattle heads, and the measuring variables comprehended: the torax diameter (TD), the body lenghth (BL), the live weight in kilograms (LW), and the age in years (AG). Cattle food was mainly pastures of “African Star” and “Jaragua” varieties, and other natural species. The herd produces milk all year round with a daily milking, and calves suckle until eight months old. The cattle measurements information was analyzed throughout fixed-effect models, including the TD, BL and AG variables, to determine the contribution of each effect for the live weight predictions. Two lineal multiple regressive models were adjusted by natural logarithm and by base-10 for males and females respectively. The analysis determined that in the studied population, the TD, BL and AG variables can be used to predict the live weight, according to the animal’s sex.
Downloads
References
CORRALES, R. 1993. Modelos para predecir el peso vivo en hembras y machos, usando mediciones postdestetes; Informe de trabajo. Costa Rica. CATIE. sp.
GLOOBE, R. 1988. Anatomía aplicada del bovino. San José, C.R. IICA. 226 p.
GONZALEZ STAGNARO, C. 1986. Edad y peso al primer servicio y al parto de novillas mestizas, Memoria ALPA (México) 21:56.
JICA-MAGA. 1992. Estudio del plan maestro sobre el proyecto de integración de desarrollo rural y agropecuario de Jutiapa: Informe intermedio. Tokio, Japón, Pacific Consultants Internacional. s.p.
MENCHACA, M.A. 1990. El uso de modelos etápicos para describir las curvas de crecimiento animal. Revista cubana de ciencias agrícolas. 24: 29-34.
MENCHACA, M.A. 1991a. Modelado del crecimiento en peso bovino. 1. Un modelo intrínsicamente lineal para la presentación del crecimiento. Revista Cubana de Ciencias Agrícolasç 25: 125-128.
MENCHACA, M.A. 1991b. Modelado del crecimiento en peso bovino. 2. Modelo multiplicativo con el conrol de curva de crecimiento y otros efectos. Revista Cubana de Ciencias Agrícolas. 25: 231-236.
PALADINES, O. 1986. Mediciones de la respuesta animal en ensayos de pastoreo: Ganancia de Peso. In evaluación de pasturas con animales: Alternativas metodológicas. Memorias de una reunión de trabajo celebrada en Perú, 1984. Ed por C. Lascano y E. Pizarro. Colombia. CIAT. pp. 99-126.
PRESTON, T.R.; LENG, R.A. 1990. Adecuando los sistemas de producción pecuaria a los recursos disponibles; Aspectos básicos y aplicados del nuevo enfoque sobre la nutrición de rumiantes en el trópico. 2 ed. Cali, Colombia, Circulo Impresores. 313 p.
SAS. 1988. Clustering; Introduction cluster, fastclus, tree, varclus. In SAS user’s guide statistics. North Caroline. SAS Institute. pp. 417-416.
SPENCER, W.P.; ECKERT, J.B. 1988. Estimación del peso vivo y el peso en canal de los vacunos N’Dama de Gambia. Revista Mundial de Zootecnia. 65:16-23.
STEEL, R.G.; TORRIE, J.H. 1988. Bioestadística: Principios y procedimientos. Td. Ricardo Martinéz B. México. Mc Graw-Hill. 622 .
Downloads
Published
How to Cite
Issue
Section
License
1. Proposed policy for open access journals
Authors who publish in this journal accept the following conditions:
a. Authors retain the copyright and assign to the journal the right to the first publication, with the work registered under the attribution, non-commercial and no-derivative license from Creative Commons, which allows third parties to use what has been published as long as they mention the authorship of the work and upon first publication in this journal, the work may not be used for commercial purposes and the publications may not be used to remix, transform or create another work.
b. Authors may enter into additional independent contractual arrangements for the non-exclusive distribution of the version of the article published in this journal (e.g., including it in an institutional repository or publishing it in a book) provided that they clearly indicate that the work was first published in this journal.
c. Authors are permitted and encouraged to publish their work on the Internet (e.g. on institutional or personal pages) before and during the review and publication process, as it may lead to productive exchanges and faster and wider dissemination of published work (see The Effect of Open Access).
