فهرس المقالات ewe lamb

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  1 - Comparing Body Weight, Body Biometrical Parameters, Blood Metabolites, and Progesterone Concentration of Ewe Lambs and Yearling Ewes
  م. ابراهیمی ب. فردوست غ. مقدم س.ع. رافت ع. حسین خانی ص. علیجانی ح. دقیق کیا ح. پایا
  Regardless of reasonable reproductive performance of ewe lambs of many breeds, Ghezel ewe lambs have a very poor fertility rate, but Ghezel yearling ewes have a high fertility rate. So, comparing ewe lambs with yearling ewes can help us to understand the reason of this أکثر

  Regardless of reasonable reproductive performance of ewe lambs of many breeds, Ghezel ewe lambs have a very poor fertility rate, but Ghezel yearling ewes have a high fertility rate. So, comparing ewe lambs with yearling ewes can help us to understand the reason of this difference. Accordingly, this study was designed to evaluate body weight, body biometrical parameters, serum metabolites, progesterone concentration, and trait correlations of Ghezel ewe lambs and yearling ewes. During the breeding season, Ghezel ewe lambs (n=36, 7 months old) and yearling ewes (n=39, 18 months old) were weighed, their body biometrical parameters were measured, blood samples were collected, and serum metabolites and progesterone concentrations were measured. Then, all data were analyzed by the general linear model procedure of SAS software. The results of this study indicated higher relative body weight, all body biometrical parameters (except head length), and progesterone concentration in yearling ewes in comparison with ewe lambs (p < 0.01). However, serum urea and glucose concentrations were lower in yearling ewes in comparison with ewe lambs (p < 0.05). Also, results indicated a positive correlation of relative body weight and age with progesterone concentration of yearling ewes (p < 0.01). On the other hand, results indicated a negative correlation of serum progesterone, relative body weight and age with urea concentration of yearling ewes (p < 0.05). The overall results of this study indicated that Ghezel ewe lambs had lower relative body weight, body parameters, and progesterone concentration, but higher blood glucose and urea concentrations in comparison with yearling ewes. تفاصيل المقالة
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  2 - Estrus Synchronization Methods during the Non-Breeding Season of Ghezel Ewe Lambs
  M. Ebrahimi R. Aghamohammadzadeh G. Moghaddam H. Daghigh Kia
  Synchronization can improve the reproductive performance of ewe lambs during the non-breeding season, though seeking a simple method can be more practical for farmers. Accordingly, the study aimed to evaluate the reproductive performance of ewe lambs during the non-bree أکثر

  Synchronization can improve the reproductive performance of ewe lambs during the non-breeding season, though seeking a simple method can be more practical for farmers. Accordingly, the study aimed to evaluate the reproductive performance of ewe lambs during the non-breeding season using different clomiphene citrate (CC) protocols compared with progesterone sponge (PS) + equine chorionic gonadotropin (eCG) protocol. In this study, 40 Ghezel ewe lambs were divided into four randomly groups: 1) PS + eCG group: PS insertion (day 0-12) + 500 IU eCG injection on day 12; 2) PS + CC group: PS insertion (day 0-12) + oral administration of 100 mg CC/day (day 7-12); 3) CC + eCG group: oral administration of 100 mg CC/day (day 7-12) + 500 IU eCG injection on day 12; 4) CC group: oral administration of 100 mg CC/day (day 7-12). Ram introduction was done for five days. Blood samples were taken on 1, 11, 14, and 40 days, and serum levels of estradiol and progesterone were measured. Pregnancy and lambing rates were also assessed. Results indicated that pregnancy and lambing rates were the highest in PS + eCG group, while the lowest or no performance was observed in CC groups (P<0.05). Based on the overall results of the present study, the best synchronization method during the non-breeding season for ewe lambs was PS + eCG compared with the CC protocols. تفاصيل المقالة