AMELIORATIVE EFFECTS OF VITAMIN C ON THE HEAT-STRESSED MALE ZARAIBI GOATS | ||
| Egyptian Journal of Zoology | ||
| Article 2, Volume 65, Issue 65, June 2016, Pages 19-40 | ||
| Document Type: Original Research Papers | ||
| DOI: 10.12816/0027816 | ||
| Authors | ||
| Atef A. Ali1; Tarek M. Abdel Khalek2; Abrar F. Mosaad2; Anwar Mansour1 | ||
| 1Zoology Department, Faculty of Science, Cairo University, Giza, Egypt | ||
| 2Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture, Cairo, Egypt | ||
| Abstract | ||
| The present work was designed to assess the effect of vitamin C doses on heat stress in male Zaraibi goats, during summer season. Climatic parameters; including ambient temperature (AT), relative humidity (RH) and temperature humidity index (THI); were estimated under the sunny and shadow conditions. Under sunny circumstances, the climatic parameters were meaningfully elevated as compared to the shadow conditions. The experimental periods (1, 2, 3, 4, 5 & 6 weeks), vitamin C doses (0, 8, 15 and 30 mg/kg body weight) and their interactions exhibited significant effects on all the studied parameters including: rectal temperature (RT), respiratory rate (RR), red blood cells count (RBCC), white blood cells count (WBCC), concentrations of total antioxidant capacity (TAC), triiodothyronine (T3), thyroxine (T4), total proteins (TP), albumin (Alb), total cholesterol (TC), triglycerides (TG), creatinine (Creat) and Urea (U) as well as the activities of alanine aminotransferase (ALT) and aspartate aminotransferase (AST). In heat-stressed goats, the RT, RR, RBCC and levels of TP, Alb, TC, TG, Creat, U and activities of AST and ALT were significantly increased as compared to those under shadow, and were correlated positively to the THI, whereas inversely to the vitamin C doses. However, the WBCC, TAC and T3 and T4 levels were reduced with increasing THI, but were significantly enhanced by increasing the dose of vitamin C. In conclusion, the daily vitamin C intake was effective against the signs of heat stress. | ||
| Keywords | ||
| vitamin c; goats; heat stress; Rectal temperature; Respiratory rate; Total Antioxidant Capacity; thyroid hormones | ||
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