Читать книгу Bovine Reproduction - Группа авторов - Страница 130

The SC measurement is obtained while doing the general and reproductive examination [6]. It can be obtained from the side or the rear, depending on preference, facilities, and the bull's temperament. After gently forcing both testes to the bottom of the scrotum, the primary considerations are to avoid spreading the testes apart and to ensure sufficient pressure that the top surface of the measuring tape is level with the skin (Figure 8.3). Record the measurement at this point. If the circumference is below the minimum requirement, there is no need to continue the examination. Young bulls or emaciated bulls may receive a deferred classification in some cases. The SFT minimum thresholds [7] for SC are listed below:

 30 cm at <15 months

 31 cm at >15 to ≤18 months

 32 cm at >18 to ≤21 months

 33 cm at >21 to ≤24 months

 34 cm at >24 months.