Effect of melatonin implantation on Semen quality Holstein bulls:1- Ejaculate volume and Total normal morphology sperm

M. Eidan, S.; I. Khalil, R.; H. Ali, Z.

	Effect of melatonin implantation on Semen quality Holstein bulls:1- Ejaculate volume and Total normal morphology sperm
Al-Anbar Journal of Veterinary Sciences
Article 1, Volume 10, Issue 1, 2017, Pages 145-153 PDF (539.3 K)
Authors
S. M. Eidan; R. I. Khalil; Z. H. Ali
Abstract
This study was conducted to investigate the effect of melatonin implantation on ejaculate volume and total normal morphology sperms of Holstein bulls. This study was executed at the department of artificial insemination pertaining to the directorate of animal resource ministry of agriculture, Abu-Ghraib (25 km west of Baghdad) during the period from 7th of December, 2015 to 1st of June, 2016 using 12 Holstein bulls of 3-5 years old and 500-750 kg live body weight the bulls were randomly distributed into three equal groups (4 bulls/ group). The first group was left without any treatment, regarding as control group (T1), whereas left, second and third group were subcutaneous-ear implanted with 54 (T2) and 72 (T3) mg of melatonin respectively Re-implantation of hormone was done, one month later, Semen was also collected from each experimental bulls via artificial vagina, as once ejaculate per bull weekly to explore the effect of melatonin implantation on fresh, cooled as well as 48hr and 1 week post cryopreservation (PC). Non- significant differences were observed among treatments in ejaculate volume among treatments, preservation periods and weeks, Greater (p≤0.05) total normal morphology (TNM) was noticed in T2 and T3 groups as compared with the T1 group for most experimental periods. In conclusion, the melatonin implantation has a positive role in improving total normal morphology sperms of Holstein bulls, which in turn enhancing the reproductive performance and fertility percentage of cows as well as increasing the artificial insemination productivity and owners income
Keywords
Melatonin hormone; semen quality; Holstein bulls

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