Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 8(6): 601-607
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Muhammad Fahad Bhutta1, Muhammad Tariq2, Muhammad Tarique Tunio3, Abubakar Sufyan4, Hafiz Abdul Rauf1, Moazzam Javed1, Safdar Imran5*

1Semen Production Unit, Qadirabad, District Sahiwal, L&DD Department Punjab, Pakistan; 2Subcampus, Tobah Tek Singh, University of Agriculture Faisalabad, Pakistan; 3Department of Agricultural Sciences, Faculty of Sciences, Allama Iqbal Open University, Islamabad, Pakistan; 4Faculty of Veterinary Sciences, Bahauddin Zakariya University, Multan, Pakistan; 5Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Pakistan.

Abstract | The study was planned to determine the effect of seasonal variations on seminal characteristics of Sahiwal breeding bulls maintained at semen production unit, Qadirabad, district Sahiwal, Punjab, Pakistan. Semen ejaculates (N=1040) were collected weekly during the period of one year from Sahiwal bulls (N=10). Semen ejaculate volume was observed to be maximum with average 4.27±0.16 ml in winter which differed significantly p<0.05 with its lowest corresponding value in autumn (3.75±0.21 ml). Mass activity (expressed in scale 1-5) differed considerably p<0.05 throughout all seasons and was lowest (1.58±0.05) in humid summer but spring and dry summer yielded best values (1.99±0.05 and 2.00±0.06 respectively). Highest mean values of individual motility and sperm concentration (77.61±0.33% and 954.4±38.42 million/ml respectively) were also recorded in dry summer while lower mean values (75.96±0.91% and 845.7±34.70 million/ml respectively) were observed in autumn seasonIndividual motility in humid summer (74.91±0.65%) was significantly low (p≤0.05) as compared to all other seasons except autumn (77.61±0.33%). It is concluded that Sahiwal bulls produced better quality semen in spring and dry summer while humid summer and autumn were negatively impacting the semen quality.

Keywords | Bovine, Seasonal changes, Semen quality, Sahiwal, Motility