Effects of lasalocid in late gestation and other factors on blood metabolite profiles of finn targhee ewes and their lambs and colostrum composition

Thomas, V.M.; Hanford, K.J.; Kott, R.W.

Nutrition Reports International 36(6): 1257-1266


ISSN/ISBN: 0029-6635
Accession: 005311381

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The objective of this study was to determine the effects of lasalocid(L) and other factors on blood metabolite profiles of ewes and their lambs and colostrum composition. Feeding L the last 3 wk of gestation had no effect (P > .05) on ewe blood metabolite concentrations. Ewe 3-hydroxybutyrate (HB) concentrations ranged from .4 to .45 mM/1, confirming the ewes were meeting their metabolizable energy requirements. Normal range for HBA in ewes is .3 to .8 mM/1. Alkaline phosphotase (AP) concentrations were greater (P < .05) for ewes lambing at 4 compared to 2 years-of-age and during wk 21 compared to wk of 19 of gestation. Ewe serum globulin (GB) concentrations were higher (P < .05) during wk 19 compared to wk 20 and 21 of gestation. Colostral fat concentration was higher (P < .05) at 0 and 6 h after birth then at 12, 18 or 24 h after birth. Protein concentration of colostrum was higher (P < .05) at 0 h compared to other time intervals evaluated. Protein colostrum concentration declined from 14.6% at 0 h to 6.8% at 12 h after birth. Lamb blood metabolite concentrations were not influenced (P > .05) by L with the exception of GB which was lower (P < .05) in lambs born to L fed ewes. Lambs had lower GB concentrations at 6 h compared to 24 h after birth. Serum blood urea N was higher (P < .05) and glucose lower (P < .05) at 6 h compared to 24 h after birth.