Manejo de toros Donadores de Semen

Abstract

Monitoring the nutritional status of bull should base on body condition (range of 4 to 3.5). The bull cannot be in less than 4, especially before and during the breeding season. The bulls should be underwent andrological examination at least 60 days before the beginning of breeding season, so they have time for, if necessary, any treatment, removal or replacement of the bulls. In this review, acquired changes in question are considered and if done for the first time, the diagnosis of birth defects in recommending the elimination of the player. Examination of semen indicates the capacity of bull sperms with good potential for normal production of fertilization. In addition to the mandatory vaccination programs (foot and mouth disease), vaccine is recommended for bulls every year against 1BR and BVD, and every 6 months against leptospirosis. Venereal disease prevention should begin with the acquisition of proven bulls from herds and test negative for Trichomonas and Campylobacter. Pest control should be based on the "OPG", the number of parasite eggs per gram of feces, avoiding strategic doses. It is necessary to perform every 3 months these tests, taking stool samples from 10 % of bulls and send them to specialized laboratories. When a bull is used in natural mating, it must be able to serve between 25 and 80 cows. For greater reproductive efficiency is maximized, it is necessary that sexual behavior is as close as possible to perfection in all its stages. An examination of sexual behavior must consist of 3 phases: libido, serving capacity and serviceability.