Application of laparoscopic artificial insemination in a conventional lacaune sheep farm using frozen-thawed semen

dc.contributor.advisorVass, Nóra
dc.contributor.authorZegeye, Zemenu Birhan
dc.contributor.departmentDE--Mezőgazdaság- Élelmiszertudományi és Környezetgazdálkodási Karhu_HU
dc.description.abstractDue to the complex anatomical structure of the ewe reproductive tract accompanied with low quality of frozen ram semen for artificial insemination, this has resulted to a challenge in regard to using superior genotypes for reproductive ovine performance. Hence, improved genetics in ovine management has not been efficiently and widely used. Therefore, intrauterine semen deposition by laparoscopic insemination should be adopted in the current sheep production systems. Thus, this study aimed to assess the pregnancy rate (PR) and lambing rates (LR) of ewe inseminated by laparoscopic insemination techniques using frozen-thawed semen. The research used imported frozen-semen from France originating from two rams of the Lacaune breed. Ram semen provided was categorized A and B to distinguish the identity of the two rams, whereas the ewes were grouped according to age in years (1, 2 and 4). Before insemination, the semen was examined microscopically for its motility and viability and thereafter the LAI technique was performed to 19 Lacaune breed ewes using frozen-thawed semen. The overall pregnancy and lambing rates results were 31.57% (6/19) and 42.10% (8/19) respectively. Out of 2 ewes in the one-year age group that were inseminated, only 1 ewe lambed representing 50%. However, from 16 ewes inseminated of four-year age group, 5 ewes lambed representing 31.25%. Significant difference based on age group was not evaluated due disproportionate of the data, (such that the data included 2 ewes in one-year-old age group, 1 ewe in two-year-old age group and 16 ewes in four-year-old age group). Based on the ram semen, 33.33% and 30% of the inseminated ewes were pregnant from ram A and ram B semen respectively. However, in the case of lambing rate, 44.44% and 40 % of the ewes lambed from using semen of ram A and B respectively. There was no significant difference (p>0.05) in pregnancy and lambing rates based on semen collected from the two rams. Finally, in this research study, ram semen had no significant effect on pregnancy and lambing rates using laparoscopic AI on the flock. This could be due to the fact that the rams had quality semen. Furthermore, it could be due to the fact that the rams were of the same breed hence there was no difference between ram semen. Evaluation of ram semen, accompanied with appropriate ewe selection based on age and rightful deposition of semen could lead to better and more consistent results. Overall this could contribute to the successful application of laparoscopic artificial insemination in Lacaune sheep production systems for enhanced productivity.hu_HU
dc.description.courseAnimal husbandry engineeringhu_HU
dc.subjectlaparoscopic inseminationhu_HU
dc.subjectartificial inseminationhu_HU
dc.subjectfrozen-thawed semenhu_HU
dc.subjectpregnancy ratehu_HU
dc.subject.dspaceDEENK Témalista::Mezőgazdaságtudományhu_HU
dc.titleApplication of laparoscopic artificial insemination in a conventional lacaune sheep farm using frozen-thawed semenhu_HU