Authors : Cordova-Izquierdo Alejandro , Cortes Suarez Sau , Ruiz Lang C Gustvo , A. Saltijeral Oaxaca Jorge , M. Xolalpa Campos Victor , Cordova-Jimenez Mary Silvia , Cordova-Jimenez Cristian Alejandro and Guerra Liera Juan Eulogio
Abstract: With the objective of valuing the age and the weight to the weaning of calves of Bos taurus crossed with Bos indicus, the registrations of 302 calves were used of Bos taurus crossed with Bos indicus in a proportion of � to � approximately. The evaluated European races were mainly: Belgian blue, Charolais, Limousin and Beef master, crossed with having won zebu like: Brahaman, Nellore, Indobrasil and Simbrah among others. The studied variables went the weight to the birth (PN) to the 15 and 30 days of age, the weight to the weaning (PD) where use of a precocious weaning was made with an average of 120 days of age and lastly was considered the Daily Gain of Weight (GDP) to the 3, 4 and 5 months of age. The results were analyzed by means of descriptive statistic of central tendency where for the weights to the birth presented an average of 37.3 kg to the 15 days and 50.8 kg to the 30 days of age, with a range of weight of 20 kg to 77 k.o. for both cases. The weight to the weaning presented an average of 175 kg to the 4 months of age, with ranges of 132-256 kg on the average, obtaining the best weights the race Belgian blue, followed by the race zebu and charolais. For the daily gain of weight between the 90 and 150 days of age an average of 1.15 kg was obtained and a range of 0.820-1.85 kg.
Cordova-Izquierdo Alejandro , Cortes Suarez Sau , Ruiz Lang C Gustvo , A. Saltijeral Oaxaca Jorge , M. Xolalpa Campos Victor , Cordova-Jimenez Mary Silvia , Cordova-Jimenez Cristian Alejandro and Guerra Liera Juan Eulogio , 2008. Gain of Weight and Age to the Weaning of Livestock Bos taurus � Bos indicus Low Conditions of Humid Tropic . Research Journal of Biological Sciences, 3: 326-328.