Exame andrológico em touros (estudo de caso)

Abstract

The andrological examination is fundamental for the evaluation of all reproductive factors that may compromise the fertility of bulls, in order to obtain complete information about the sexual capacity of the bulls. The role of the male is decisive as one individual will be responsible for mating numerous females, therefore, its reproductive profile is more important than the fertility of the particular cow. The infertile or problematic male brings mounting losses when not diagnosed. Thus, the objective of this study was to avoid these animals with low fertility to enter the reproductive management and to select animals with proven fertility through andrological examination. In total, 43 bulls were evaluated, with ages between two and 14 years, being 19 Nelore, 14 Tabapuã and ten Aberdeen Angus from Guabiju farm, located at Salgado Filho, Southwest of Paraná State, extensively bred, aiming to analyze the aspects of semen, sperm evaluation and scrotal perimeter (SP). The animals were submitted to andrological examination and after evaluation 14 animals were discarded for being outside the expected standard, advanced age, gait defects, absence of teeth. The espermatic motilility (%), scrotal perimeter (cm) and vigor (0 to 5) variates by the age of the bull, the results from 29 aproved bulls at examination to thouse were for Angus: 78 (± 11,2), 37,3 (± 2,0) and 3,8 (± 0,68); Nelore: 61,11 (± 10,54), 35,5 (± 4,4) and 2,67 (± 0,5) and for Tabapuã: 61 (± 11,97), 34,7 (±3,23) and 3,2 (±0,42), respectively. The knowledge and application of the andrological examination proved to be of great importance for the selection of bulls for reproduction, avoiding these animals with low fertility enter the reproductive management, consequently preventing low conception rates.