| Autor: |
Majdi A. Bahadi, Emad M. Samara, Mohammed A. Al-Badwi, Khalid A. Abdoun, Ahmed A. Al-Haidary |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Journal of the Saudi Society of Agricultural Sciences, Vol 22, Iss 5, Pp 283-287 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
1658-077X |
| DOI: |
10.1016/j.jssas.2023.01.003 |
| Popis: |
Due to global warming, animal’s heat tolerance and adaptability characteristics to hot environmental conditions are attracting more research interest. The current experimental study was actually designed to evaluate and compare the heat tolerance efficiency of two purebred Saudi sheep when exposed to heat stress conditions under a biometeorologically-simulated environment similar to Kingdom of Saudi Arabia (KSA) semi-arid environment. A total of 20 healthy male growing lambs of Najdi and Naimi breed with an initial body weight of 24.71 ± 4.65 Kg and 4 month-old were used in a 2-phases experiment. During the preliminary phase (lasted for 3 weeks), lambs were placed under a stable thermoneutral condition. Meanwhile, simulation of the external environment was performed using climatic-controlled chambers during the experimental phase (lasted for 8 weeks). Several meteorological [ambient temperature (Ta), relative humidity (RH) and temperature humidity index (THI)] and thermophysiological [rectal temperature (Tr), skin temperature (Tsk), respiratory rate (RR), heat tolerance coefficient (HTC), adaptability coefficient (AC), internal (BTGin), external (BTGex) and total (BTGto) body thermal gradients] measurements were recorded at weeks 0, 4 and 8. The obtained meteorological data showed that the prevailed conditions in the climatic chamber exhibited (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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