Effect of semen collection by transrectal massage of accessory sexual glands or artificial vagina on the outcome of breeding soundness examinations of Italian yearling beef bulls

Although semen quality is one of the major traits that influence breeding soundness examination outcomes in bulls, field conditions occasionally do not allow for the collection of semen samples by means of an artificial vagina. The aims of the present study were to report the results of a large numb...

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Bibliographic Details
Published in:Theriogenology 2015-03, Vol.83 (5), p.779-785
Main Authors: Sylla, Lakamy, Palombi, Claudio, Stradaioli, Giuseppe, Vagniluca, Antonio, Monaci, Maurizio
Format: Article
Language:English
Subjects:
Accessory sexual glands
Animals
Artificial vagina
Bovine
Cattle - physiology
Ejaculation - physiology
Male
Physical Stimulation
Sperm Count - veterinary
Sperm Head
Sperm Motility
Spermatozoa
Spermatozoa - abnormalities
Spermatozoa - physiology
Tissue and Organ Harvesting - methods
Tissue and Organ Harvesting - veterinary
Transrectal massage
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Summary:Although semen quality is one of the major traits that influence breeding soundness examination outcomes in bulls, field conditions occasionally do not allow for the collection of semen samples by means of an artificial vagina. The aims of the present study were to report the results of a large number of semen collections that were performed via the transrectal massage (TRM) of the accessory sexual glands of Italian yearling beef bulls and compare this semen collection method to the artificial vagina (AV) method in term of breeding soundness examination outcomes; furthermore, we determined whether the breed affected the semen characteristics. In the TRM group (n = 475), the semen samples were collected via TRM of the accessory sexual glands, and in the AV group (n = 502), the AV method was used. In the TRM group, semen samples were obtained from 81.3% of the bulls and penile protrusion was observed in 87.6% of the animals during semen collection. The sperm concentrations (920.5 ± 439.0 vs. 281.0 ± 259.8 × 106/mL) and the percentages of total abnormal spermatozoa (22.8 ± 15.0 vs. 18.8 ± 12.9) were significantly higher in the AV group than those in the TRM group. The percentage of bulls that did not meet the minimum requirement for normal cells (≥70%) was 6.2% higher in the AV group than that in the TRM group (P 
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2014.11.011