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RU
У 375 сивножаток применено по 2 мл Suisterol. Доза содержала 0,512 мг хoрионного гонадоrропина и 2 мг бензоата эстрадиола. Охоту показало 215 свиноматок (57,3%), из которых опоросились 132 (61,4%. Во II репродукционном цикле участвовало 46,2%, а в III — 22,8% самок. Контрольную группу составляло 140 свиноматок, покрытых в результате спонтанной охоты, из котрых опоросилось 78,6%. Во II репродукционном цикле участвовало 78.6%, а в III — 46,4% самок. В течение 3 репродукционных циклов в экспериментальной группе родилось 1899 поросят, т.е. на одну покрытую свиноматку приходилось 8,83 поросенка. В контрольной группе в 3 репродукционный циклах родилось 2078 поросят, т.е. на одну покрытую сивноматку проиходилось 14,84 поросенка. Разницы в плодовитости между группами оказались статистически существенными. Самки, как свиноматки подвергнутые гормональной стимуляции, показывали пониженную репродукицонную способность по сравнению с самками, покрытыми как свиноматки в результате спонтанной охоты.
EN
Suisterol containing 0.512 mg of gonadotropin and 2 mg of estradiol in a dose was administered in 375 young sows. Oestrus was noted in 215 sows (57.3%) of which 132 (61.4%) brought forth. In the second reproductive cycle 46.2% of females took part and in the third — 22.8%. A control group consisting of 140 sows which had been, covered uring spontaneous oestrus 78.6% farrowed. In the second cycle 78.6% and in the third 46.4% of females took part in the reproductive cycle. Within three reproductive cycles 1899 piglets were born in the experimental group (8.83 per one female) and in the control group — 2078 piglets (14.84 per animal). These differences in reference to fertility were statistically significant. Females which were stimulated by hormones showed in the course of three reproductive cycles a decreased ability to reproduction compared with young sows which had been covered owing to spontaneous oestrus.
EN
The use of assisted reproductive techniques in wild felids (Felidae) is currently the subject of research in many scientific centers all around the world. Despite the described success, the pregnancy rates obtained as the result of artificial insemination or embryo transfer are low and the litters are small, which is a limiting factor for wider use of reproduction biotechnology in wild felids. The lack of sufficient knowledge about endocrinology of individual members of the Felidae family and the inability to optimize female hormonal stimulation is given as a reason of failure by many authors. This paper presents methods of control of ovarian cycle in wild animals, characteristic features of reproduction of the family Felidae, and methods of the induction of estrus and ovulation. The paper also draws attention to endocrine disorders that occur in felines after hormonal stimulation and describes attempts to minimize them by prestimulatory down-regulation of ovarian activity.
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