Effects of Trenbolone Acetate and Zeranol implants on performance, carcass, and meat traits of young bulls and steers

摘要

Implanting young bulls and steers with trenbolone acetate and zeranol(Ralgro ®) resulted in increased slaughter weights and carcasses that tended tohave more marbling than those of control bulls. Furthermore, steaks from bothimplanted bulls and implanted steers tended to have less detectable connectivetissue. Control bulls had larger scrotal circumferences and heavier testicle weightsthan implanted bulls. Other secondary sex characteristics were not affected, but inthese bulls slaughtered at an average age of 13.6 months, sexual development was minimal. Implanting steers with trenbolone acetate and zeranol resulted inperformance and carcass and meat quality slightly superior to control bulls.