Methods of semen collection in ram and buck

METHODS OF SEMEN COLLECTION IN RAM AND BUCKS

The semen collection in Ram and Bucks is done by

Vaginal method

Here the male is allowed to mount the female in or out of heat and the semen is withdrawn from the vagina

  • Generally female out of heat is preferred to avoid the mixing of vaginal secretion with semen
  • It is better to rinse the vagina thoroughly with normal saline or a suitable sterile clean semen dilutor before semen collection
  • After ejaculation the semen is withdrawn from the anterior part of vagina by a glass pipette or plexi glass.
  • For adopting this method, both male and female should be free from diseases.

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Artificial vagina method

The method is similar to bulls

  • The rubber cylinder will have 20 cm length and 5 cm wide and the inner liner will be 25 cm long and 3.75 cm wide.

Parts of AV used for sheep and goat

  • The AV is prepared as bull AV.
  • The inner temperature of AV should be around 45-50⁰C. Half of the AV is filled with hot water and the remaining is filled with air.
  • The liner can be lubricated with non-spermicidal jelly.
  • The ram can be easily trained with estrual ewe. It can be trained with dummy also.
  • The bucks prefer estrual doe only. The non-estrual doe will move laterally while mounting.
  • Mounting and ejaculation is rapid in ram and buck. So the operator should be alert while collecting the semen.
  • The penis should not be touched with the hand. The sheath of the penis should be grasped and should be directed towards the AV.

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Electro ejaculation method

  • This method was first described by Gunn in rams during the year 1936.
  • This method can be satisfactorily used in ram and buck.

Electroejaculator

Procedure

  • Restrain the animal.
  • Empty the rectum by using warm saline enema.
  • Pass the electrode into the rectum of the animal after applying K-Y jelly.
  • Pass the electrical current 2, 5 and 8 volt peaks in a series of 5 seconds on and 5 seconds off by increasing the voltage. The voltage should be increased slowly.
  • Hold the penis with gauze and direct the urethral process into the collection vial.

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Last modified: Monday, 4 June 2012, 10:57 AM