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- Title
CONCENTRAÇÕES SÉRICAS DE TESTOSTERONA EM TOUROS JOVENS GUZERÁ E SUAS ASSOCIAÇÕES COM CARACTERÍSTICAS REPRODUTIVAS.
- Authors
Dias, Juliano Cesar; Emerick, Lucas Luz; de Andrade, Venício José; Martins, Jorge André Matias; do Vale Filho, Vicente Ribeiro
- Abstract
Twenty-four Guzerat bulls, raised extensively, from 24 to 34 months of age, were evaluated aiming to determine the bulls serum testosterone concentration profile and associate it with andrological characteristics (physical and morphological aspects), scrotal circumference (SC), Breeding Soundness Evaluation for Zebu (BSEz), body weight and age. The average of testosterone concentration was 1.36 ng/mL, with influence of time of collection on circulating levels, with the higher concentration occurring at 7:00 am and the lowest at 7:00 pm. The phenotypic correlations observed between testosterone and age (0.53; p=0.0069), body weight (0.72; p<0.0001), SC (0.55; p=0.0058), semen volume (0.56; p=0.0042), sperm concentration (0.71; p=0.0003), testicle consistence (0.40; p=0.0515) and BSEz (0.46; p=0.0260) suggest favorable associations among those characteristics. The results indicate compatibility between body growth and fertility with serum testosterone concentrations; and also indicate that circulating levels of testosterone may help on identification and selection of Guzerat bulls with major reproductive potential.
- Subjects
TESTOSTERONE; BULLS; DISEASES; SCROTUM; ANIMAL health; BODY weight
- Publication
Archives of Veterinary Science, 2014, Vol 19, Issue 1, p24
- ISSN
1517-784X
- Publication type
Article
- DOI
10.5380/avs.v19i1.32140