Testicular development Sindi bulls

Abstract

In mammals, the growth of the gonads is associated with the steroids secretion and scrotal circumference (SC), age at puberty significantly correlated. Studies have also shown that the interaction between testicular measurements, body weight and scrotal circumference has been used in breeding programs for sexual precocity. This study aimed to evaluate the evolution of scrotal circumference in Sindi bulls into two contemporaries’ age groups. A group of bulls with samples taken at different times was used. In each time, the body weight, sperm output and scrotal circumferences from each bull of the group was evaluated. It was found that the bulls with 13 months average age showed a mean weight of 384.67 kg and an average scrotal circumference was 32.5 cm. In the second collect, the same bulls already with an average age of 25 months had a mean weight of 494 kg and an average scrotal circumference was 38 cm. The SC and weight values showed significant differences between different ages in the two groups. Body weight and scrotal circumference of animals depending on age-related, concludes that the scrotal circumference in Sindi bulls resemble those already reported taurine measures, which stand up in the requirement precocity compared to zebu breeds. The animals have provided significant weight development when held in a particular containment system, providing conditions to express their genetic potential, capable of reaching more weight in less time and begin sexual life early.