| 
              
              
              Open Access  
 
              
              
              
              Research 
              
              
(Published 
				online: 20-02-2016)  
              15. 
				
				Effect of management system and 
				season on semen freezability in Jakhrana bucks 
				- 
				
				Narendra Kumar, 
				B. Rai, 
				Showkat A. Bhat, S. D. Kharche, Chetna Gangwar, 
				S. K. Jindal
				
				
				and Subhash Chandra 
              
              Veterinary World, 9(2): 199-202   
              
   
                
                
doi: 
              
				
				10.14202/vetworld.2016.199-202 
                
				  
				
				Narendra Kumar:
				
              
              	Department of 
				Livestock Production and Management, ICAR - National Dairy 
				Research Institute, Karnal - 132 001, Haryana, India; 
				narendrakumarvet@gmail.com 
				
				B. Rai:
				
              
              Department of 
				Physiology Reproduction and Shelter Management, ICAR- Central 
				Institute for Research on Goats, Mathura - 281 001, Uttar 
				Pradesh, India; brai21464@gmail.com 
				
				Showkat A. Bhat:
				
              
              Department of 
				Livestock Production and Management, ICAR - National Dairy 
				Research Institute, Karnal - 132 001, Haryana, India; 
				drshowkatbhat813@gmail.com 
				
				S. D. Kharche:
				
              
              Department of 
				Physiology Reproduction and Shelter Management, ICAR- Central 
				Institute for Research on Goats, Mathura - 281 001, Uttar 
				Pradesh, India; kharche62@gmail.com 
				
				Chetna Gangwar:
				
              
              Department of 
				Physiology Reproduction and Shelter Management, ICAR- Central 
				Institute for Research on Goats, Mathura - 281 001, Uttar 
				Pradesh, India; chetnaom82@gmail.com 
				
				S. K. Jindal:
				
              
              Department of 
				Physiology Reproduction and Shelter Management, ICAR- Central 
				Institute for Research on Goats, Mathura - 281 001, Uttar 
				Pradesh, India; Jindalmathura@gmail.com 
				
				Subhash Chandra:
				
              
              Department of 
				Livestock Production and Management, ICAR - National Dairy 
				Research Institute, Karnal - 132 001, Haryana, India; 
				subhashchandra20july@gmail.com   
				
				Received: 27-09-2015, Revised: 30-12-2015, Accepted: 12-01-2016, 
				Published online: 20-02-2016 
				  
				
              	
              	Corresponding author:Narendra Kumar, e-mail: narendrakumarvet@gmail.com 
 
              Citation: 
				Kumar N, Rai B, Bhat SA, Kharche SD, Gangwar C, Jindal SK, 
				Chandra S (2016) Effect of management system and season on semen 
				freezability in Jakhrana bucks, Veterinary World 9(2): 
				199-202. 
 
              
				Abstract 
 
				Aim: 
				The 
				objective of the study was to determine the effect of the 
				management system (intensive and semi-intensive) and season 
				(autumn and winter) on semen freezability in Jakhrana bucks.
				 
				Materials and 
				Methods: 
				A total of 24 
				Jakhrana bucks of same body weight and age (BW=30 kg, age=1 
				year) were randomly allotted into two groups, viz., Group 
				I (intensive system, 12 bucks) and Group II (semi-intensive 
				system, 12 bucks). These two groups were statistically tested 
				for their homogeneity with respect to age and BW. Semen was 
				collected twice weekly using an artificial vagina during two 
				seasons: autumn (September-November) and winter 
				(December-February). A total of 240 semen samples (120 from each 
				group and season) were evaluated for post-thaw motility (PTM), 
				viability, abnormality, functional membrane integrity 
				(hypo-osmotic swelling [HOS]) response and acrosomal integrity.
				 
				Results:
				The 
				mean values of PTM and acrosomal integrity of spermatozoa were 
				significantly (p<0.01) higher in Group II as compared to Group 
				I. The mean values of viability and abnormality were also 
				differed significant (p<0.05) between groups. However, the mean 
				values of HOS response were found non-significant (p>0.05) 
				between groups. The season showed a significant effect on all 
				parameters except viability and HOS response. The PTM and 
				acrosomal integrity of spermatozoa were significantly (p<0.01) 
				higher in winter as compared to autumn season. Abnormality of 
				spermatozoa was significantly (p<0.05) lower in winter season.
				 
				Conclusions:
				This 
				study indicates that both management system and season influence 
				semen freezability. The semen collected from bucks reared under 
				the semi-intensive system and winter season showed better semen 
				freezability characteristics.  
				
				Keywords: 
				
				freezability, Jakhrana, management system, season. 
 
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