Browsing by Author "Dafoe, Julia Mae"

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Effect of supplemental safflower seed and vitamin E to late gestating ewes on lamb growth and thermogenesis
(Montana State University - Bozeman, College of Agriculture, 2006) Dafoe, Julia Mae; Chairperson, Graduate Committee: Patrick G. Hatfield.
Fifty-one twin bearing Targhee ewes (Trial 1) and 1182 single and twin bearing white face range ewes (Trial 2) were used in a 2 x 2 factorial arrangement of treatments to determine the effect of supplemental energy source and level of vitamin E on lamb serum metabolites and thermogenesis (Trial 1), and lamb growth (Trial 2). During the last 30 d of gestation, ewes were individually (Trial 1) or group (Trial 2) fed a daily supplement. Supplements were: 226 g safflower seeds (SS) and either 350 (VE) or 0 (VC) IU vitamin E or 340 g of a grain-based supplement (GC) and either VE or VC. One h postpartum in Trial 1, twin born lambs were placed in a 0oC dry cold chamber for 30 min. Lamb rectal temperature was recorded every 60 s and blood samples were taken immediately before and after cold exposure. . In Trial 2 lambs were weighed at birth, turnout and weaning. Ewes were weighed at turnout and weaning. During the cold exposure in Trial 1, lambs from SSVC ewes had the lowest (P = 0.01) body temperature, a decrease (P < 0.08) in NEFA concentration, and an increase (P = 0.06) in serum glucose while lambs born to GCVC ewes had a decrease in serum glucose.