Attempts to develop a simple, objective test for oestrus in sows
نویسندگان
چکیده
منابع مشابه
Detecting Oestrus by Monitoring Sows’ Visits to a Boar
This paper suggests a method for automatic detection of sows returning to 1 oestrus in the gestation department. The detection is based on monitoring of 2 sows’ visits to a boar, where the duration and frequency of visits are modelled 3 separately and subsequently combined. The hypothesis is that it is possible 4 to reduce the response time and the number of false alarms compared to 5 previousl...
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To investigate endocrine mechanisms associated with the occasional occurrence of fertile oestrus during lactation in the high prolific Chinese Meishan (MS) breed, the incidence of oestrus and changes in plasma luteinizing hormone (LH) levels before and after oestradiol benzoate (OB, 15 micrograms/kg body weight) administration on day 22 was compared in 4 MS and 6 Large White (LW) sows. All sows...
متن کاملTool to Develop and Apply Objective Tests
1 Luciana A M Zaina, University of São Paulo, Digital System Department of Polytechnic School , Brazil,[email protected] du 2 Graça Bressan, University of São Paulo, Digital System Department of Polytechnic School , Brazil, [email protected] 3 Wilson V Ruggiero, University of São Paulo, Digital System Department of Polytechnic School , Brazil, [email protected] Abstract Distance educatio...
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هدف اصلی از این تحقیق به دست آوردن و مقایسه حق بیمه باورمندی در مدل های شمارشی گزارش نشده برای داده های طولی می باشد. در این تحقیق حق بیمه های پبش گویی بر اساس توابع ضرر مربع خطا و نمایی محاسبه شده و با هم مقایسه می شود. تمایل به گرفتن پاداش و جایزه یکی از دلایل مهم برای گزارش ندادن تصادفات می باشد و افراد برای استفاده از تخفیف اغلب از گزارش تصادفات با هزینه پائین خودداری می کنند، در این تحقیق ...
15 صفحه اولEffect of backfat loss during lactation on weaning-to-oestrus interval of sows at gonadotropin application
A total of 984 primiparous and multiparous crossbred sows (Swedish Landrace × Large White) housed on a commercial pig farm were used to study the effect of the decrease in backfat thickness during lactation and the level of backfat at weaning on weaning-to-oestrus interval and conception rate of sows. Primiparous sows (n=213) received a single injection of 400 IU eCG + 200 IU hCG (PG600, Interv...
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ژورنال
عنوان ژورنال: The Journal of Agricultural Science
سال: 1985
ISSN: 0021-8596,1469-5146
DOI: 10.1017/s0021859600055799