efeito da concentração espermática e do número de inseminações artificiais sobre a fertilidade de éguas inseminadas com sêmen fresco diluído effects of sperm concentration and number of artificial inseminations on fertility of inseminated mares with diluted fresh semen
تأثير تركيز الحيوانات المنوية وعدد مرات التلقيح الاصطناعي على خصوبة الأفراس الملقحة بسائل منوي طازج مخفف
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Abstract
This work aimed to study the effects of spermatic concentrations (200× 10(6) and 400×10(6) spermatozoa/inseminated dose) and number of inseminations (two, three and four or more) on the fertility of 62 mares (military type). Mares were teased and inseminated on Mondays, Wednesdays and Fridays with diluted semen from only one stallion of proven fertility. The conception rates during the first cycle for the two spermatic concentrations were, respectively, 66.7%(20/30) and 65.5%(19/29) and after four cycles they were, respectively, equals to 52.0%(26/50) and 57.8%(26/45) with no difference on conception rate according to the spermatic concentrations (P>0.05). The conception rates for the first cycle after two, three and four or more inseminations were, respectively, 72.0%(18/25), 65.2%(15/23) and 54.6%(6/11) and after four cycles they were, respectively, equals to 59.0%(23/39), 52.5%(21/40) and 50.0%(8/16) with no differences on conception rates according to the number of inseminations. The results suggested that mares could be inseminated using a spermatic concentration of 200×10(6)/inseminated dose on Mondays, Wednesdays and Fridays without any loss of fertility independently of the number of inseminations/cycle.
هدفت هذه الدراسة إلى بحث تأثيرات تركيز الحيوانات المنوية (200 × 10(6) و400 × 10(6) حيوان منوي/جرعة التلقيح) وعدد التلقيحات (اثنتان، ثلاث، وأربع أو أكثر) في خصوبة 62 فرساً (من النوع العسكري). خضعت الأفراس لاختبار الشياع ولُقّحت أيام الاثنين والأربعاء والجمعة باستخدام سائل منوي مُمدد من فحل واحد فقط ذي خصوبة مثبتة. بلغت معدلات الحمل خلال الدورة الأولى لتركيزي الحيوانات المنوية 66.7% (20/30) و65.5% (19/29) على التوالي، وبعد أربع دورات بلغت، على التوالي، 52.0% (26/50) و57.8% (26/45)، دون وجود فروق في معدل الحمل تبعاً لتركيز الحيوانات المنوية (P>0.05). وبلغت معدلات الحمل للدورة الأولى بعد تلقيحتين وثلاث وأربع تلقيحات أو أكثر 72.0% (18/25)، و65.2% (15/23)، و54.6% (6/11) على التوالي، وبعد أربع دورات بلغت، على التوالي، 59.0% (23/39)، و52.5% (21/40)، و50.0% (8/16)، دون وجود فروق في معدلات الحمل تبعاً لعدد التلقيحات. وأشارت النتائج إلى إمكانية تلقيح الأفراس باستخدام تركيز حيوانات منوية يبلغ 200 × 10(6)/جرعة تلقيح أيام الاثنين والأربعاء والجمعة دون أي فقدان في الخصوبة، وبصرف النظر عن عدد التلقيحات/الدورة.
| Reference Key |
brando2003arquivoefeito
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|---|---|
| Authors | ;F.Z. Brandão;J.M. Silva Filho;M.S. Palhares;H.M. Saturnino;W.S. Viana;M.S. Dantas;H.N. Oliveira |
| Journal | Environmental research |
| Year | 2003 |
| DOI |
10.1590/S0102-09352003000100009
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| URL | |
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