Effect of multiple stress factors (thermal, nutritional and pregnancy type) on adaptive capability of native ewes under semi-arid environment.

摘要: This study was conducted to evaluate the effect of multiple stress factors (thermal, nutritional and pregnancy type) on two different native track breeds ewes as reflected by their adaptive capability under semi-arid environment. The stressor experiment in twenty-four (12 Santa Ines 12 Morada Nova ewes). Both heat common all four groups. However, animals were divided into further groups within each breed basis nutrition regimen. According groupings were: Group 1 (Six ewes; stress; at 0.5% BW; single pregnancy); 2 1.5% twin 3 4 pregnancy). All pregnant. Heat induced exposing summer outside environment while regimen followed level body weight (BW) respectively breed. a completely randomized design with breeds, treatments types, 10 repetitions for physiological parameters six blood parameters, repeated measures over time. Physiological (respiratory rate, pulse rate rectal temperature) measured rest morning afternoon, 0600-0700 1300-1400h, respectively, every seven days. Blood samples collected 14d determination serum glucose, triglycerides, cholesterol, urea creatinine. We found interaction between type respiratory temperature greater values than ewes. there no significant fixed supplementation responses breeds. Environmental factor (period day) had influenced during gestational period. glucose concentration 105d 120d gestation compared concentrations 120d, 150d also cholesterol 105d, 135d present result indicates that thermal condition most important modified tropical