Seasonal changes of andrological characteristics in British milk ram

Peter Sarlós, Aandrás Molnár, Szilvia Huszár, Jozsef Rátky, Klaus Peter Brüssow

Research output: Contribution to journalArticle

10 Citations (Scopus)


Seasonal changes of testicular size, testosterone levels in blood plasma and seminal characteristics were observed in British Milk rams at biweekly intervals during 12 months. Significant differences were found among the average seasonal values of the parameters measured. Testicular volume showed a minimum value in winter (459.16 cm3 on the average) and a maximum value in autumn (612.96 cm3 on the average). Testosterone level was found to be highest in autumn (16.53 ng/ml). Percentage of deformed spermatozoa was highly increased in August (22.72%). Differences among quantitative characteristics of semen were also significant. Testicular volume was significantly correlated to testosterone level in blood plasma (P<0.1%) and several sperm characteristics. Average daily temperature was found to influence testicular volume and seminal characteristics while natural day length influenced testosterone concentration and seminal characteristics as well. Testicular volume, natural day length and average daily temperature together affected first of all testosterone concentration and quantitative seminal parameters. The results confirm that rams of this breed are capable for breeding throughout the year.

Original languageEnglish
Pages (from-to)265-275
Number of pages11
JournalArchiv fur Tierzucht
Issue number3
Publication statusPublished - Dec 1 1996



  • Ram
  • Seminal characteristics
  • Sheep
  • Testis volume
  • Testosterone

ASJC Scopus subject areas

  • Food Animals
  • Animal Science and Zoology

Cite this

Sarlós, P., Molnár, A., Huszár, S., Rátky, J., & Brüssow, K. P. (1996). Seasonal changes of andrological characteristics in British milk ram. Archiv fur Tierzucht, 39(3), 265-275.