Artificial Insemination of Sheep - Possibilities, Realities and Techniques at the Farm Level

Kukovics, S.; Gyoker, Erzsebet; Németh, Tímea; Gergátz, E.

doi:10.5772/16642

Cited by 15 publications

(11 citation statements)

References 11 publications

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“…Artificial insemination and ET are routinely used in most sheep stud enterprises and breeding businesses. Previous researches have also shown that varying influential factors, such as the sheep breed, age of the ewe, method (laparoscopic or cervical) of AI/ET, time between AI and synchronisation, type of semen (frozen or fresh) and the season of the year [ 16 ] can effect reproductive success. Artificial insemination and ET programs are advantageous to sheep production enterprises because they enable sheep breeders to enhance the genetic potential of their flock and minimize generation time, whilst being a cheaper, safer and more efficient alternative to natural mating.…”

Section: Discussionmentioning

confidence: 99%

Faecal glucocorticoid metabolites and body temperature in Australian merino ewes (Ovis aries) during summer artificial insemination (AI) program

2018

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Reproductive wastage is a key issue for sheep producers, both regionally and globally. The reproductive output of farm animals can be influenced by physiological and environmental factors. Rapid and reliable quantification of physiological stress can provide a useful tool for designing and testing on-farm management interventions to improve farm animal welfare and productivity. In this study, we quantified physiological stress non-invasively using faecal glucocorticoid metabolites-FGMs analysis and body temperature measurements of 15 superovulated donor merino ewes (Ovis aries) during participation in artificial insemination (AI) program conducted during 2015/2016 Australian summer. We hypothesized that low percentage transferable embryos in donor merino ewes will be associated positively with higher body temperature and/or higher FGMs in these ewes. Temperature humidity index (THI) was calculated and found within high thermal stress range during the two AI trials. Overall, results showed none of the factors (ewe ID, AI trial no., THI or FGMs) were significant for reduced percentage transferrable embryos, except ewe body temperature was highly significant (p = 0.014). Within AI trial comparisons showed significant positive associations between higher FGMs and body temperature with reduced transferrable embryos. These results suggest that Australian merino ewes participating in summer AI trials can experience physiological stress. Prolonged activation of the stress endocrine response and high body temperature (e.g. ensued from heat stress) could impact on ewe reproductive output. Therefore, future research should apply minimally invasive physiological tools to gather baseline information on physiological stress in merino sheep to enable the development of new farm-friendly methods of managing stress.

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Section: Discussionmentioning

confidence: 99%

Faecal glucocorticoid metabolites and body temperature in Australian merino ewes (Ovis aries) during summer artificial insemination (AI) program

2018

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“…The does were inseminated by an insemination pipette using speculum with attached light source, liquid semen was deposited in the entrance of the cervic as described by Anderson et al (18), fixed time at 48 to 50 hours after sponge's withdrawal. Result of in vivo fertilization presented in the percentages of pregnant does according to Kukovicset al (19) that pregnancy rate = Number of kidding/number of AI.…”

Section: Estrus Synchronization and Artificial Insemination (Ai)mentioning

confidence: 99%

Preservation Effect of Crude Fig Fruit Filtrate (Ficus carica L) Added In to Tris Egg Yolk Based Extender on Capacitating, Acrosome and Fertility of Half Blood Boer Buck Spermatozoa

Zaenuri¹,

Susilawati²,

Wahyuningsih³

et al. 2014

IOSRJAVS

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“…Wildeus (2000) reported that 40-64% lambing percentage could be achieved through cervical insemination with fresh semen in seasonally anestrus ewes during different timing of PMSG injection (-48 h or 0 h in relation to MAP sponge removal). Kukovics et al (2011) also reported that freshly diluted semen could give the best result of 70-82%. In the present study, a significant difference in lambing percentage was found between breeding season and non-breeding season following estrus synchronization and AI.…”

Section: Discussionmentioning

confidence: 93%

Effect of breeding season on fertility of sheep following estrus synchronization and fixed-time artificial insemination under field conditions in semi-arid tropical region

Kumar

Balaganur

et al. 2016

Biological Rhythm Research

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Accelerated lambing system is heavily reliant on reproductive technologies meant to enable off the season breeding in sheep. Therefore, the present study was programmed to assess the effect of breeding season (BS) on fertility of sheep following estrus synchronization (ES) and fixed time artificial insemination (FTAI). A total of 248 and 365 ewes were synchronized and inseminated during the BS (Febuary-March and July-September) and non-breeding season (NBS) respectively, during 2012-14. Synchronization of estrus was done by AVIKESIL-S, intra-vaginal progesterone sponges kept in situ in vagina for 12 days. 200 IU eCG was administered intramuscularly on 12th day after sponge withdrawal. FTAI was performed twice in ewes exhibiting signs of estrus at 48 and 56h after sponge removal, using liquid chilled semen of Patanwadi/Malpura rams containing 100 million sperm. Breeding season had no significant (p < 0.05) effect on estrus synchronization. The estrous responses during the BS and NBS were 84.68% and 83.29% respectively. The lambing percentage during BS was 66.67%, which is significantly (p < 0.05) higher than the lambing percentage of NBS (57.57%). Although, the lambing percentage in NBS maneuvered ewes were lower than the BS ewes but still the technology can be used to offset the effect of anestrus and to augment production in sheep.

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Artificial Insemination of Sheep - Possibilities, Realities and Techniques at the Farm Level

Cited by 15 publications

References 11 publications

Faecal glucocorticoid metabolites and body temperature in Australian merino ewes (Ovis aries) during summer artificial insemination (AI) program

Faecal glucocorticoid metabolites and body temperature in Australian merino ewes (Ovis aries) during summer artificial insemination (AI) program

Preservation Effect of Crude Fig Fruit Filtrate (Ficus carica L) Added In to Tris Egg Yolk Based Extender on Capacitating, Acrosome and Fertility of Half Blood Boer Buck Spermatozoa

Effect of breeding season on fertility of sheep following estrus synchronization and fixed-time artificial insemination under field conditions in semi-arid tropical region

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