Periódicos Brasileiros em Medicina Veterinária e Zootecnia

p. 01-13

Causas de reprovação de touros britânicos no exame andrológico

Renato Oliveira Menegassi, SílvioOtávio Jardim Barcellos, JúlioBatista Souza Borges, JoãoPeripolli, VanessaMcManus, Concepta

Background: The breeding soundness evaluation is a method that is based on the evaluation of all factors that contribute to the reproductive function in bull, basically is constituted by the general clinical examination, examination of internal and external genital system, measurement of scrotal circumference, semen physical and morphological evaluation and sexual behavior. Most progress in improving the reproductive efficiency can be made by estimating the fertility of the males and by careful selection of the bulls. Reproduction will continue to depend mainly on the ability to manage all available information. The aim of this study was to determine the main causes of failure in British bulls in the steps provided for breeding soundness evaluation, as well as demonstrate the importance of the behavior examination as a norm and not just as a complementary test.Materials, Methods & Results: This study consisted in evaluating the records of breeding soundness evaluation of 10,407 British breeds of bulls (Abeerden Angus, Red Angus, Hereford, Polled Hereford, Shorthorn and Devon) in the State of Rio Grande do Sul. The animals evaluated were grouped into two age classes: young bulls (two years) and adult bulls (three to ten years). Breeding soundness evaluation consisted of four steps: a general clinical examination, special clinical examination; seminal examination and behavior

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