Endocrine differences in rams after genetic selection for testis size
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چکیده
منابع مشابه
the test for adverse selection in life insurance market: the case of mellat insurance company
انتخاب نامساعد یکی از مشکلات اساسی در صنعت بیمه است. که ابتدا در سال 1960، توسط روتشیلد واستیگلیتز مورد بحث ومطالعه قرار گرفت ازآن موقع تاکنون بسیاری از پژوهشگران مدل های مختلفی را برای تجزیه و تحلیل تقاضا برای صنعت بیمه عمر که تماما ناشی از عدم قطعیت در این صنعت میباشد انجام داده اند .وهدف از آن پیدا کردن شرایطی است که تحت آن شرایط انتخاب یا کنار گذاشتن یک بیمه گزار به نفع و یا زیان شرکت بیمه ...
15 صفحه اولEndocrine disruptors and testis development.
After serving on a panel convened by the U.S. EPA on epidemiological studies needed for evaluation of possible health risks of MTBE as a fuel additive, I feel that the article is quite informative and will no doubt be useful for those contemplating further use of oxygenated fuels. There are two matters that I feel are of some importance , and about them the article is silent. First, the report ...
متن کاملTesticular development and endocrine characteristics of boars selected for either high or low testis size.
Thirty-six Landrace x Large White cross boars were selected from litters with either high or low estimated breeding values for 150-d paired testis weight. Blood samples were taken via jugular venipuncture at eight ages (42, 56, 70, 84, 98, 112, 126 and 140 d). At each sampling age, nine blood samples were taken at 30-min intervals. Luteinizing hormone (LH) was determined on the individual serum...
متن کاملThe relationship between testis size and stimulated plasma testosterone concentrations and its influence on mating performance in Dorper rams
Testis size, stimulated testosterone concentrations and mating performance (serving capacity, libido score and serve:mount ratio) of 14 Dorper rams were measured in the breeding season (March) in order to determine the influence of testis size and testosterone concentration on mating performance. Results indicated statistically non-significant (P>0,05) correlations between testis size and stimu...
متن کاملEffect of selection for size of testes in boars on semen and testis traits.
The objective of this study was to evaluate the effects of selection for increased size of testes on semen and testis characteristics. Boars from a line selected for increased size of testes at 150 d of age (TS, n = 25) and a randomly selected control line (C, n = 18) were used. Semen was collected three times per week for 3 wk (TRT1) then daily for 3 wk (TRT2) beginning when boar age averaged ...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1986
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0760131