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Biological ability of Malpura rams to counter heat stress challenges and its consequences on production performance in a semi-arid tropical environment

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Title Biological ability of Malpura rams to counter heat stress challenges and its consequences on production performance in a semi-arid tropical environment
Not Available
 
Creator Maurya VP
Sejian V
Kumar D
Naqvi SMK
 
Subject Physiological responses
semen
sexual behaviour
Sheep
thermal stress
 
Description Not Available
A study was conducted to assess the biological ability of Malpura rams to counter heat stress challenges and its impact on the productive performance in a semi-arid tropical environment. The eighteen adult Malpura rams (average body weight 55.0 kg) were divided into two groups, GI (n = 9; Control) and GII (n = 9; heat stress). The study was conducted for a period of 60 days. The results showed that body weight, body condition score, heart girth and feed intake were significantly (p < 0.05) lower in GII as compared to GI rams. The physiological responses i.e. respiration rate, pulse rate, rectal temperature and sweating rate (body and scrotum) were significantly (p < 0.05) higher in rams exposed to heat stress. Among the endocrine parameters, plasma T3, T4 and testosterone concentrations were significantly (p < 0.05) lower in GII rams, while cortisol concentration was significantly (p < 0.05) higher in GII rams. In addition, heat stress significantly (p < 0.05) reduced semen volume, total sperm motility, sperm concentration and progressive sperm motility in GII rams. The results indicated that Malpura rams adapted to the heat stress condition, however, while doing so their production performances were compromised.
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Date 2018-11-22T10:26:47Z
2018-11-22T10:26:47Z
2017-09-21
 
Type Research Paper
 
Identifier Maurya VP, Sejian V, Kumar D and Naqvi SMK. 2018. Biological ability of Malpura rams to counter heat stress challenges and its consequences on production performance in a semi-arid tropical environment. Biological Rhythm Research, 49:479-493.
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http://krishi.icar.gov.in/jspui/handle/123456789/12814
 
Language English
 
Relation Not Available;
 
Publisher Taylor Francis Online