Impact of the Temperature-Humidity Index on Body Temperature, Physiological Response, Lipid Profile, Thyroid Function, and Reproductive Performance of Damascus Goat Bucks | ||||
| Journal of Animal and Poultry Production | ||||
| Article 3, Volume 16, Issue 1, January 2025, Page 15-23 PDF (412.34 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2025.350729.1146 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
A. I Zanouny  1; T. A. Ashmawy2
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| 1Depart. of Anim. Prod., Fac. Of Agric. Minia Univ. | ||||
| 2Anim. Prod. Res. Inst., Agric. Res. Center | ||||
| Abstract | ||||
| A total of 17 Damascus bucks were exposed to different THI conditions during the experimental intervals covering THI of 14.06-21.29 in December (no HS), 22.28-25.14 in March (moderate HS), and 27.19-35.41 in July (severe-extreme HS). Temperature of hair, skin, rectum, and scrotum as well as pulse rate increased (P<0.05) under moderate HS compared to no HS, but further increase (P<0.05) was found in all under severe-extreme HS. Respiratory rate was higher (P<0.05) under severe-extreme HS than under absence or moderate HS. Increasing THI (severe-extreme HS) decreased (P<0.05) RBCs, WBCs, Hb, and Ht to the minimum values, compared to no HS. Plasma concentration of triglycerides, total cholesterol, and very LDL-cholesterol decreased (P<0.05) only under severe-extreme HS. Plasma T3 and T4 concentrations decreased (P<0.05) under severe-extreme HS compared to no or moderate HS. Reaction time was longer and plasma testosterone concentration was lower (P<0.05) under severe-extreme HS than no or moderate HS. Ejaculate volume, and percentages of sperm progressive motility, livability, normality, acrosome integrity, and sperm cell concentration were higher (P<0.05) under no or moderate HS than severe-extreme HS. Sperm output per ejaculate, as total, motile, live, and normal were higher (P<0.05) under no and moderate HS than severe-extreme HS. Body core and surface temperatures, hematology, lipid profile, thyroid function, and semen quality can be reliable monitoring tools for predicting heat stress in goat bucks. | ||||
| Keywords | ||||
| Goat; THI; body temperature; thyroxin; semen quality | ||||
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