{"title":"埃及环境条件下法拉法拉母羊部分生殖性状的季节变化","authors":"Eitedal H. El-Saye","doi":"10.12816/0037582","DOIUrl":null,"url":null,"abstract":"Thirty Egyptian Farafra ewes were used to study the effect of seasonal variations on reproductive cycle and ovarian activity. Estrus was detected twice daily throughout the year. Percentages of ewes showing estrus monthly, number of estrous cycle/ewe/season, estrous cycle length and heat duration were measured throughout different seasons of the year. Changes in ovarian activity were examined using Laparoscopy technique. Percentage of ovulated ewes, ovulation rate and number of large and small follicles were recorded over different seasons. The obtained results revealed that the highest active cycles were observed in autumn and summer (87.1 and 84%), while the lowest was observed in spring (64.3%). Percentages of ewes that exhibited normal estrous cycle length during winter, spring; summer and autumn were 73.3, 47.0, 64.0, and 44.5%, respectively. While, the percentage of the short estrous cycle length was high in autumn (37.0%). During spring, summer and winter, the percentages of the long cycle length were 25.0, 20.0 and 20.0 %, respectively. The percentages of ewes showed normal heat duration during autumn was 63.0%, summer (56.0%) and spring (46.4%), while the percentage of ewes exhibited short heat duration were in spring (53.6%) and winter (50%). During autumn, ewes recorded the longest (p<0.01) heat duration (64.7 hrs). Ovulation rate was the highest (P< 0.01) in autumn (1.75) and the lowest in winter (0.82). Incidence of large follicles (2.76 > 3 mm 3 ) in diameter were significantly higher (P<0.05) in winter. Plasma progesterone concentration was always the lowest at the onset of estrous, increased gradually to a maximum level in day 8 and remained until day 14 (luteal phase), then declined in day 16 in winter, spring and summer and at day 18 in autumn. In conclusion, subtropical Farafra ewes were almost cyclic throughout the year. Reproductive performance of Farafra ewes still need more studies to reveal the strength and potential of this breed.","PeriodicalId":129688,"journal":{"name":"Egyptian Journal of Sheep and Goat Sciences","volume":"11 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Seasonal Changes of Some Reproductive Traits in Farafra Ewes under Egyptian Environmental Condition\",\"authors\":\"Eitedal H. El-Saye\",\"doi\":\"10.12816/0037582\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Thirty Egyptian Farafra ewes were used to study the effect of seasonal variations on reproductive cycle and ovarian activity. Estrus was detected twice daily throughout the year. Percentages of ewes showing estrus monthly, number of estrous cycle/ewe/season, estrous cycle length and heat duration were measured throughout different seasons of the year. Changes in ovarian activity were examined using Laparoscopy technique. Percentage of ovulated ewes, ovulation rate and number of large and small follicles were recorded over different seasons. The obtained results revealed that the highest active cycles were observed in autumn and summer (87.1 and 84%), while the lowest was observed in spring (64.3%). Percentages of ewes that exhibited normal estrous cycle length during winter, spring; summer and autumn were 73.3, 47.0, 64.0, and 44.5%, respectively. While, the percentage of the short estrous cycle length was high in autumn (37.0%). During spring, summer and winter, the percentages of the long cycle length were 25.0, 20.0 and 20.0 %, respectively. The percentages of ewes showed normal heat duration during autumn was 63.0%, summer (56.0%) and spring (46.4%), while the percentage of ewes exhibited short heat duration were in spring (53.6%) and winter (50%). During autumn, ewes recorded the longest (p<0.01) heat duration (64.7 hrs). Ovulation rate was the highest (P< 0.01) in autumn (1.75) and the lowest in winter (0.82). Incidence of large follicles (2.76 > 3 mm 3 ) in diameter were significantly higher (P<0.05) in winter. Plasma progesterone concentration was always the lowest at the onset of estrous, increased gradually to a maximum level in day 8 and remained until day 14 (luteal phase), then declined in day 16 in winter, spring and summer and at day 18 in autumn. In conclusion, subtropical Farafra ewes were almost cyclic throughout the year. Reproductive performance of Farafra ewes still need more studies to reveal the strength and potential of this breed.\",\"PeriodicalId\":129688,\"journal\":{\"name\":\"Egyptian Journal of Sheep and Goat Sciences\",\"volume\":\"11 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Egyptian Journal of Sheep and Goat Sciences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.12816/0037582\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Egyptian Journal of Sheep and Goat Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.12816/0037582","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
以30只埃及法拉法拉母羊为研究对象,研究季节变化对其生殖周期和卵巢活动的影响。全年每天检测两次发情。在一年中不同季节测量母羊每月发情的百分比、发情周期数/母羊/季节、发情周期长度和发情持续时间。使用腹腔镜检查卵巢活动的变化。记录不同季节母羊的排卵率、排卵率和大、小卵泡数。结果表明,活度周期以秋季和夏季最高(87.1和84%),春季最低(64.3%);在冬季和春季,母羊的发情周期长度正常的百分比;夏季和秋季分别为73.3%、47.0%、64.0和44.5%。而发情周期短的比例在秋季最高(37.0%)。春、夏、冬三季长周期长度所占比例分别为25.0%、20.0%和20.0%。发热期正常的母羊比例分别为秋季(63.0%)、夏季(56.0%)和春季(46.4%),发热期短的母羊比例分别为春季(53.6%)和冬季(50%)。秋季母羊直径最长(p 3 mm 3)显著高于冬季(p <0.05);血浆孕酮浓度在发情时最低,在第8天逐渐升高至最高,并一直保持到第14天(黄体期),然后在冬春夏第16天和秋季第18天下降。总之,亚热带法拉法拉母羊全年几乎是周期性的。法拉法拉母羊的繁殖性能还需要更多的研究来揭示这个品种的实力和潜力。
Seasonal Changes of Some Reproductive Traits in Farafra Ewes under Egyptian Environmental Condition
Thirty Egyptian Farafra ewes were used to study the effect of seasonal variations on reproductive cycle and ovarian activity. Estrus was detected twice daily throughout the year. Percentages of ewes showing estrus monthly, number of estrous cycle/ewe/season, estrous cycle length and heat duration were measured throughout different seasons of the year. Changes in ovarian activity were examined using Laparoscopy technique. Percentage of ovulated ewes, ovulation rate and number of large and small follicles were recorded over different seasons. The obtained results revealed that the highest active cycles were observed in autumn and summer (87.1 and 84%), while the lowest was observed in spring (64.3%). Percentages of ewes that exhibited normal estrous cycle length during winter, spring; summer and autumn were 73.3, 47.0, 64.0, and 44.5%, respectively. While, the percentage of the short estrous cycle length was high in autumn (37.0%). During spring, summer and winter, the percentages of the long cycle length were 25.0, 20.0 and 20.0 %, respectively. The percentages of ewes showed normal heat duration during autumn was 63.0%, summer (56.0%) and spring (46.4%), while the percentage of ewes exhibited short heat duration were in spring (53.6%) and winter (50%). During autumn, ewes recorded the longest (p<0.01) heat duration (64.7 hrs). Ovulation rate was the highest (P< 0.01) in autumn (1.75) and the lowest in winter (0.82). Incidence of large follicles (2.76 > 3 mm 3 ) in diameter were significantly higher (P<0.05) in winter. Plasma progesterone concentration was always the lowest at the onset of estrous, increased gradually to a maximum level in day 8 and remained until day 14 (luteal phase), then declined in day 16 in winter, spring and summer and at day 18 in autumn. In conclusion, subtropical Farafra ewes were almost cyclic throughout the year. Reproductive performance of Farafra ewes still need more studies to reveal the strength and potential of this breed.