Effect of multiple environmental stressors on the adaptive capability of Malpura rams based on physiological responses in a semi-arid tropical environment

Sejian, Veerasamy, Kumar, Davendra, Gaughan, John B. and Naqvi, Syed M. K. (2017) Effect of multiple environmental stressors on the adaptive capability of Malpura rams based on physiological responses in a semi-arid tropical environment. Journal of Veterinary Behavior: Clinical Applications and Research, 17 6-13. doi:10.1016/j.jveb.2016.10.009

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Author Sejian, Veerasamy
Kumar, Davendra
Gaughan, John B.
Naqvi, Syed M. K.
Title Effect of multiple environmental stressors on the adaptive capability of Malpura rams based on physiological responses in a semi-arid tropical environment
Journal name Journal of Veterinary Behavior: Clinical Applications and Research   Check publisher's open access policy
ISSN 1558-7878
1878-7517
Publication date 2017-01-01
Sub-type Article (original research)
DOI 10.1016/j.jveb.2016.10.009
Open Access Status File (Author Post-print)
Volume 17
Start page 6
End page 13
Total pages 8
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Collection year 2017
Language eng
Formatted abstract
A 45-day study was conducted where the primary objective was to evaluate the effect of simultaneously imposed multiple stressors (thermal, nutritional, and walking) on the adaptive capability of Malpura rams based on changes in ingestive behavior, physiological, blood biochemical, and endocrine responses. Twenty adult Malpura rams (average body weight 44.9 kg) were used in the study. The rams were divided into 2 groups, CON (n = 10; control) and multiple stressors (MS; n = 10; multiple stressors). All of the rams were stall fed with a diet consisting of 70% roughage and 30% concentrate. The CON rams were maintained in a shed under ambient conditions with ad libitum feeding without walking, whereas MS rams were subjected to multiple stressors (thermal, nutritional, and walking). The feed intake (P < 0.01) was lower and water intake (P < 0.01) was higher in MS compared to CON rams. Among the physiological measurements, respiration rate afternoon (P < 0.01), pulse rate morning (P < 0.01), rectal temperature afternoon (P < 0.01), skin temperature afternoon (P < 0.05), and both morning and afternoon scrotum temperature (P < 0.01) increased significantly in MS rams. Both hemoglobin (P < 0.05), packed cell volume (P < 0.01), increased and plasma glucose (P < 0.01) reduced significantly (P < 0.01) in MS as compared to CON rams. Among the endocrine parameters, the plasma cortisol increased and plasma thyroxin reduced significantly (P < 0.05) in MS rams. The study indicates that Malpura rams have the capability to adjust their physio-biochemical and endocrine responses to cope with multiple stressors in a hot semi-arid environment. Furthermore, the study also indicated that respiration rate, rectal temperature, scrotal temperature, hemoglobin, packed cell volume, and cortisol may act as ideal biological markers for quantifying the impact of multiple stressors in Malpura rams.
Keyword Adaptation
Cortisol
Heat stress
Malpura ram
Multiple stress
Nutritional stress
Respiration
Sheep
Walking stress
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
 
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