| 
              
              
              Open Access  
 
              
              
              
              Research 
              
              
(Published 
				online: 28-10-2016)  
              20. 
				
				
				Evaluation of salivary electrolytes during 
				estrous cycle in Murrah buffaloes with reference to estrus 
				detection - 
				
				Indu Devi, Pawan Singh, Surerder Singh Lathwal, A. Kumaresan and 
				Kuldeep Dudi 
              
              Veterinary World, 9(10): 1157-1161   
              
   
                
                
doi: 
              
				
				10.14202/vetworld.2016.1157-1161 
                
				  
				
				Indu Devi: 
				
				Livestock Production Management Section, ICAR - National Dairy 
				Research Institute, Karnal - 132 001, Haryana, India; 
				indulathwal@gmail.com 
				
				Pawan Singh: 
				
				Livestock Production Management Section, ICAR - National Dairy 
				Research Institute, Karnal - 132 001, Haryana, India; 
				pawansinghdabas@gmail.com 
				
				Surerder Singh Lathwal: 
				
				Livestock Production Management Section, ICAR - National Dairy 
				Research Institute, Karnal - 132 001, Haryana, India; 
				lathwal314@gmail.com 
				
				A. Kumaresan: 
				
				Department of Animal Reproduction (Livestock Production 
				Management), Livestock Research Centre, ICAR - National Dairy 
				Research Institute, Karnal - 132 001, Haryana, India; 
				ogkumaresan@gmail.com 
				
				Kuldeep Dudi: 
				
				Animal Nutrition Group, National Dairy Development Board, 
				SCF-80, Panchkula - 134 109, Haryana, India; dr.dudi.kuldeep@gmail.com   
				
				Received: 04-06-2016, Accepted: 14-09-2016, Published Online: 
				28-10-2016   
				
              	
              	Corresponding author: 
              	
				
				Indu Devi, e-mail: indulathwal@gmail.com 
 
              Citation: Devi I, Singh P, Lathwal SS, Kumaresan A, Dudi K (2016) 
				Evaluation of salivary electrolytes during estrous cycle in 
				Murrah buffaloes with reference to estrus detection, 
				
				Veterinary World, 9(10): 
				1157-1161. 
 
              
				Abstract 
 
				
				
				Aim: 
				
				Timely estrus detection is one of the critical factors for 
				increasing reproductive efficiency in buffaloes. In recent 
				decades, saliva has become a more popular as a noninvasive 
				source for determining physiological status of animals by 
				various biochemical electrolytes. This study was designed to 
				assess and correlate changes in different salivary minerals 
				concentration (calcium, inorganic phosphorus, magnesium, sodium, 
				potassium, and chloride) during different stages of the estrous 
				cycle in Murrah buffaloes. 
				
				
				Materials and Methods: 
				
				The saliva samples were collected during the different phases of 
				the estrous cycle from 20 Murrah buffaloes in early morning 
				hours and were assayed using respective minerals assay kits. 
				
				
				Results: 
				
				The concentrations of calcium (8.76±0.08-12.11±0.11 mg/dl), 
				inorganic phosphorus (6.56±0.13-14.72±4.50 mg/dl), magnesium 
				(2.27±0.14-5.79±0.15 mg/dl), sodium (139.47±0.31-159.62±1.22 
				mmol/L), potassium (12.40±0.22-26.85±1.22 mmol/L), and chloride 
				(109.28±0.41-137.07±0.68 mmol/L) varied during the different 
				phases of estrous cycle. The concentration of calcium, inorganic 
				phosphorus, magnesium, sodium, potassium, and chloride in saliva 
				were significantly (p<0.01) higher during estrus phase compared 
				to other phases of the estrous cycle. All these minerals were 
				positively and significantly (p<0.0001) related to estrogen 
				concentration while salivary concentrations of calcium, 
				magnesium, sodium, and chloride showed a significant (p<0.0001) 
				negative correlation with progesterone level in blood plasma. 
				
				
				Conclusion: 
				
				These preliminary findings indicate that there are definite 
				variations in salivary mineral and electrolyte concentrations 
				during different phases of the estrous cycle. These results may 
				be used as an aid for estrus detection/ confirmation in 
				buffaloes although validation of the results using a large 
				number of animals is required. 
				
				Keywords: 
				
				heat detection, noninvasive method, saliva electrolytes, silent 
				heat. 
 
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