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Tropical Animal Health and Production

, Volume 51, Issue 8, pp 2287–2295 | Cite as

Renal efficiency underlies adaptive heterothermy of heat-stressed hypohydrated goats

  • Hosam Al-TamimiEmail author
  • Raed Al-Atiyat
  • Ahmad Al-Majali
  • Omran Alameri
Regular Articles
  • 31 Downloads

Abstract

We investigated the thermotolerance of the F1 progeny (Black Bedouin × Damascus crossbreed) to summer conditions alongside that of two pure breeds. Male goats (n = 7 per breed) were used to conduct a summertime 28-day trial along with hypohydration. The animals were fitted with miniscule thermologgers, intraperitoneally and subcutaneously, to measure core (Tc) and peripheral (Tp) body temperatures (BT), respectively. All goats were kept under shaded housing for a 7-day basal period before being switched to unshaded pens for the next 21 days. During the first 14 days, animals had free access to water. However, during the third 7-day period, access to water was time-restricted (4 h/day). Finally, it was restricted to 40% of the third week’s average daily intake over the last 7 days. Exposure to the unshaded conditions resulted in pronounced heat stress in all animals, as reflected by 0.42 and 1.44 °C rises for Tc and Tp, respectively. The F1 goats displayed a clear heterothermic adaptive response, especially after the water restriction bouts’ initiation. Interestingly, the F1 goats displayed higher ratios of renal relative medullary thickness (77.7, 73.3, and 72.6 ± 1.1%) along with higher circulating concentrations of antidiuretic hormone (44.6, 31.6, and 11.6 ± 3.7 ng/mL), respectively, which suggested an improved water metabolism.

Keywords

Goat Hyperthermia Thermoregulation Heat stress Hypohydration Heterothermy 

Notes

Acknowledgments

Utmost gratitude is extended to the staff in the Agricultural Experimental Station, College of Agriculture at Mutah University, for the help to facilitate the experimental work.

Funding information

This project was funded by the Scientific Research Fund at the Ministry of Research and Higher Education in Jordan and the Deanship of Academic Research at Mutah University, Karak-Jordan (Grant number A.V./2/25/2008).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Statement of animal rights

All described experimental procedures were pre-approved by the Animal Care and Use Committee at Mutah University, and were in line with the regulations of all institutional and national guidelines for the care and use of research animals.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Department of Animal Production, College of AgricultureJordan University of Science & TechnologyIrbidJordan
  2. 2.Animal Production Department, College of AgricultureMutah UniversityKarakJordan
  3. 3.Department of Clinical Veterinary Medical Sciences, Faculty of Veterinary MedicineJordan University of Science & TechnologyIrbidJordan

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