فهرس المقالات Lori ewes

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  1 - Efficacy of CIDR or FGA Sponges with hCG Treatments on the Conception Rate and Prolificacyin Lori Ewes Out of the Breeding Season
  M.M. Moeini F. Alipour M.R. Sanjabi
  Two experiments were performed to determine the effectiveness of different progestogens contained in intravaginal devices, different doses of eCG and subsequent hCG treatment on the reproductive performance of estrus-induced mature Lori ewes. In the first experiment, 88 أکثر

  Two experiments were performed to determine the effectiveness of different progestogens contained in intravaginal devices, different doses of eCG and subsequent hCG treatment on the reproductive performance of estrus-induced mature Lori ewes. In the first experiment, 88 ewes were allocated into two groups, and were treated with either fluorogestone acetate (FGA) sponges or Controlled Internal Drug Release devices (CIDR).The sponges were withdrawn 13 days after insertion and then ewes were treated with either 350 IU or 500 IU of eCG by intramuscular injection. There was no significant difference among treatments in the percentage of ewes in estrus or the interval to the onset of estrus. However, the conception rate and prolificacy of ewes treated with 350 IU eCG, in both the FGA and CIDR groups, was higher than ewes treated with 500 IU of eCG. In the second experiment 384 ewes were randomly divided into three groups and after synchronization with FGA spongesand 350 IU of eCG, 128 ewes in the first group (T1) were injected 250 IU hCG when artificially inseminated, 128 ewes in the second group (T2) were injected 250 IU hCG 12 days after AI and the 128 ewes in the third group (C) acted as the control group. Estrous was determined by monitoring 35 teaser rams to calculate estrous rate. Prolificacy and conception rate were assessed and serum progesterone (P4) concentrations were measured on days 12, 14 and 16 days after AI. Prolificacy was increased in the T1 group compared with control group (P<0.05) and conception rates were higher in hCG treatments (P<0.05). The weight of single lambs on the day ofbirth increased with the hCG injection on days 0 and 12 (P<0.05). The P4 concentration was higher in the hCG-treated groups compared with the control ewes on day 16 (P<0.05). It is concluded that CIDR and FGA sponges were equally effective for estrous induction in anestrous Lori ewes and P4 concentrations increased with 200 IU hCG given at the time of AI or 12 days after AI which could improve reproductive performance. تفاصيل المقالة
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  2 - Milk Yield and Blood Metabolite Profile in Late Pregnancy in Lori Ewes Receiving Diets Containing Undegradable Protein Sources
  ر. کوشکی ح. منصوری یاراحمدی م. خالداری ج. فخرائی ک. کرکودی
  An experiment was conducted to investigate the effects of supplementing Lori ewes with rumen-undegradable protein (RUP) in late pregnancy on their performance and that of their lambs. Milk yield and blood metabolite profile were measured. Forty pregnant ewes were used i أکثر

  An experiment was conducted to investigate the effects of supplementing Lori ewes with rumen-undegradable protein (RUP) in late pregnancy on their performance and that of their lambs. Milk yield and blood metabolite profile were measured. Forty pregnant ewes were used in a completely randomized design trial with four treatments: 1) a basal diet (control); 2) with a supplement of 5% fishmeal; 3) with a supplement of 5% extruded soybean and 4) with a supplement combining both sources. Supplementation started 30-days before the estimated parturition date. Dietary inclusion of fish meal significantly improved body weight at lambing compared to the other groups (P<0.05). Lambs of ewes fed diets supplemented with rumen undegradable protein (RUP) were heavier at birth and weaning compared to other groups (P<0.05). Soybeans, of the combined supplement improved the colostrum concentration of IgG in postpartum ewes (P<0.05). Diets containing extruded soybeans resulted in milk with higher milk urea nitrogen content than the control diet (P<0.05). Serum concentration of glucose was significantly decreased in ewes fed diets containing RUP pre-partum (P<0.05), while post-partum glucose concentration was only decreased in ewes fed diets containing fish meal without or with extruded soybeans (P<0.05). Plasma concentration of beta-hydroxybutyric acid (BHBA) and non-esterified fatty acid (NEFA) were significantly decreased in the treated groups compared to the control group in post-partum ewes (P<0.05). تفاصيل المقالة