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Estrus synchronization and fixed-time artificial insemination in sheep under field conditions of a semi-arid tropical region

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Abstract

A study was conducted to assess the success of estrus synchronization and fixed-time artificial insemination (FTAI) in sheep under field conditions of a semi-arid tropical region. A total of 471 ewes belonging to 17 farmers of four villages in Tonk district of Rajasthan (Jelmiya, Dhani Jaisinghpura, Tantiya and Bheepur) were synchronized for estrus during the years 2011 and 2012. Synchronization of estrus was done by AVIKESIL-S, cost-effective intra-vaginal sponges developed by the Institute and eCG protocol. The sponges were kept in situ in the vagina for 12 days and 200 IU eCG (Folligon, Intervet) was administered intramuscularly at the time of sponge withdrawal on the 12th day. Fixed-time cervical insemination was performed twice in ewes exhibiting estrus (restlessness, shaking of tail, slightly swollen vulva, moist and reddish cervical external os), 48 and 56 h after sponge removal, using liquid chilled semen of Patanwadi/Malpura rams containing 100 million sperm per dose. The estrus response recorded was 79.4 % (374/471) and lambing rate was 60.42 % (226/374). It may be concluded from the encouraging results of the present study that FTAI can be used effectively to take advantage of both the genetic improvement and economic benefit that can be realized by the use of estrus synchronization in conjunction with artificial insemination (AI).

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Acknowledgment

The authors are also highly thankful to Shri Surendra Singh Rajput and Shri Munir Ahmed for their technical help during the experiment.

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Division of Animal Physiology and Biochemistry, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304501, India

    Kalyan De, Davendra Kumar & Syed Mohammed Khursheed Naqvi

  2. Transfer of Technology and Social Science Division, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304501, India

    Debabrata Sethi & Rajiv Gulyani

  3. Adaptation Physiology Laboratory, Division of Animal Physiology and Biochemistry, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304501, India

    Kalyan De

Authors
  1. Kalyan De
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  2. Davendra Kumar
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  3. Debabrata Sethi
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  4. Rajiv Gulyani
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  5. Syed Mohammed Khursheed Naqvi
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Correspondence to Kalyan De.

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De, K., Kumar, D., Sethi, D. et al. Estrus synchronization and fixed-time artificial insemination in sheep under field conditions of a semi-arid tropical region. Trop Anim Health Prod 47, 469–472 (2015). https://doi.org/10.1007/s11250-014-0735-x

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  • DOI: https://doi.org/10.1007/s11250-014-0735-x

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