University of Khartoum

Growth, Thermoregulation and Hematological Responses of Lambs in Relation to Age and Maternal Nutritional Supplementation

Growth, Thermoregulation and Hematological Responses of Lambs in Relation to Age and Maternal Nutritional Supplementation

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Title: Growth, Thermoregulation and Hematological Responses of Lambs in Relation to Age and Maternal Nutritional Supplementation
Author: Elnageeb, Mohamed E.; Abdelatif, Abdalla M.
Abstract: The maternal nutrition is a major intrinsic factor that influences intrauterine fetal growth and organogenesis. Manipulation of maternal nutrition is particularly critical during pregnancy and lactation. Therefore, evaluation the effects of maternal nutrition on growth performance and physiological responses of newborn lambs provided useful data for sheep industry. Twenty sexually mature estrus synchronized grazing ewes were assigned randomly to two equal groups, control and supplemented. The supplemented group additionally received daily 500 g/head of concentrate mixture + minerals and vitamins saltlick. The control group was maintained on grazing only. Body Weight (BW), rectal temperature (Tr) and Respiration Rate (RR) were monitored and blood samples were collected from lambs born to each group of ewes within 12 h after birth and then every 3 days for two weeks and then weekly up to weaning age of three months. At birth, BW, Tr and RR were significantly higher in lambs born to supplemented ewes. In both groups of lambs, BW, Tr and RR were significantly higher at birth compared to the values measured during the 3 months of postnatal life. The mean BW increased significantly with the advance of age while Tr and RR decreased progressively. Both groups of lambs showed a significant decrease in PCV, Hb concentration and plasma glucose level with the advance of age. The levels of serum total protein, albumin and urea decreased significantly during the first month of postnatal life in both groups and then these parameters showed gradual increase up to 3 month of age. The overall responses to concentrate supplementation of ewes was reflected on significantly higher values of parameters measured for the lambs born to supplemented ewes compared to lambs born to control groups. The findings indicate that the performance of lams can be potentiated through maternal dietary supplementation.
URI: http://khartoumspace.uofk.edu/123456789/21768


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