Effect of Regulating Mating System on Sexing of Rahmani Lambing

E. I. Khalifa; M. E.  Ahmed; K. Mohamed Bahera; O. A. El-Zolaky; A. A. Abedo

doi:10.12816/0005031

Article Details

Effect of Regulating Mating System on Sexing of Rahmani Lambing

Authors:

E. I. Khalifa | M. E. Ahmed | K. Mohamed Bahera | O. A. El-Zolaky | A. A. Abedo

Publisher:

The Egyptian Association for Sheep and Goat

Main Topics:

Zoological sciences/Animals

Journal:

Egyptian Journal of Sheep and Goat Sciences 2013 vol.8 Issue 1, pp.111-118

Document Type:

Article

Publication Date:

4/2013

Document Language:

English

Document ID (Org No.):

49436

Frequency:

Tri-Annual

eISSN:

20900376

pISSN:

20900368

DOI:

10.12816/0005031

Descriptors:

Keywords:

Abstract:

 The experimental work was carried out as field welfare trial on Rahmani ewes to explain the effect of the interval time between proem of estrus and mating time on sexual ratio and reproductive performance. Data were obtained from 186 mature and healthy ewes without any problem in estrus and parturition. All experimental ewes were nourished biological corn silage before breeding season up to 34 days as flushing period. At the beginning of the trial, the ewes were allocated into three groups (n=62 each). The G1 (as control) was received fertile rams at instant of estrus. Both G2 and G3 were surrendered to mating at 15 hours and at 30hours from the visual detection of estrus, respectively. Eight rams without significantly differences in testicular measurements and semen characteristics were serviced ewes flock. The present results showed that systematic mating time during estrus has been believed to influence the conception rate and gender offspring ratio. The conception rate in G1, G2 and G3 was 75.81 %, 88.71 % and 95.16 %, respectively. The sexing parturition number between males and females was 20: 19 in G1, 9: 49 in G2 and 61: 10 in G3, respectively. The sexing ratio between male and female lambs was 51.28 % and 48.72% in G1, respectively. Delaying mount was awarded to a significant deviation in sexing towards females (84.48%) in G2 and males (85.92%) in G3. It can be concluded that interval time between the initiate of estrus and mating is a reliable tool for fetal sex determination in Rahmani ewes. As conclusion, , if breeders have more attention to sexing lambs, they could arrange time of mating in flock. Mating in middle of estrus could yield more female lambs while, retard mating during estrus might give more male lambs than mating at the onset of estrus.

Article Details

Effect of Regulating Mating System on Sexing of Rahmani Lambing

Authors:

E. I. Khalifa | M. E. Ahmed | K. Mohamed Bahera | O. A. El-Zolaky | A. A. Abedo

Publisher:

The Egyptian Association for Sheep and Goat

Main Topics:

Zoological sciences/Animals

Journal:

Egyptian Journal of Sheep and Goat Sciences 2013 vol.8 Issue 1, pp.111-118

Document Type:

Article

Publication Date:

4/2013

Document Language:

English

Document ID (Org No.):

49436

Frequency:

Tri-Annual

eISSN:

20900376

pISSN:

20900368

DOI:

10.12816/0005031

Descriptors:

ANIMAL BREEDING

REPRODUCTIVE PERFORMANCE

MATING SYSTEMS

LAMBS

ACIDIMETRY

VAGINA

Ewes Welfare

Mating Time System

Vaginal PH

Sexing Lambs

Reproductive Performance

Issues

Article Details

Authors: E. I. Khalifa | M. E. Ahmed | K. Mohamed Bahera | O. A. El-Zolaky | A. A. Abedo

Publisher: The Egyptian Association for Sheep and Goat

Main Topics: Zoological sciences/Animals

Journal: Egyptian Journal of Sheep and Goat Sciences 2013 vol.8 Issue 1, pp.111-118

Document Type: Article

Publication Date: 4/2013

Document Language: English

Document ID (Org No.): 49436

Frequency: Tri-Annual

eISSN: 20900376

pISSN: 20900368

DOI: 10.12816/0005031

Descriptors:

Issues

Authors:

E. I. Khalifa | M. E. Ahmed | K. Mohamed Bahera | O. A. El-Zolaky | A. A. Abedo

Publisher:

The Egyptian Association for Sheep and Goat

Main Topics:

Zoological sciences/Animals

Journal:

Egyptian Journal of Sheep and Goat Sciences 2013 vol.8 Issue 1, pp.111-118

Document Type:

Article

Publication Date:

4/2013

Document Language:

English

Document ID (Org No.):

49436

Frequency:

Tri-Annual

eISSN:

20900376

pISSN:

20900368

DOI:

10.12816/0005031