Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 66 for “"boar"”.
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Long-term storage of liquid boar spermatozoa
… changes associated with storage and aging of boar spermatozoa; and (d) characterize properties of boar spermatozoa important to fertilization. The least-squares means for the percentage of normal apical ridge acrosomes were significantly affected by ejaculate within boar (P< .001), boar x …
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Factors affecting fertility in frozen-thawed boar sperm
Frozen-thawed boar sperm holds the potential to have an impact on the future of the swine industry. Utilization of this technology could improve a swine producer’s ability to access top-tier genetics from around the world, to improve efficiency, profitability, and the quality of product to meet …
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Enhancing Boar Reproductive Performance for Purposes of Artificial Insemination
… expedited the training of sexually inexperienced boars for semen collection and increased spermatozoal output, and 2) determine the effects of dietary L-carnitine supplementation on boar libido, semen quality, sperm production, and maintenance of sperm motility during liquid storage. Experiment 1 …
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Enhanced fertility estimation and novel ion channels in boar sperm
Cryopreserved boar sperm have many potential advantages when used for artificial insemination (AI), including increased time for pathogen testing and ease of semen transport. However, frozen boar sperm are seldom used for AI due to decreased pregnancy rates and litter sizes as a result of …
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Purification and identification of sulfated Lewis X binding proteins in boar sperm
After insemination, sperm can be held in the isthmus region of the oviduct forming a reservoir. There is evidence that formation of the oviduct sperm reservoir is mediated, at least partially, by sperm recognition of carbohydrate structures present on the oviduct epithelium. In pigs, previous …
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Method development and proteomic profiling of boar seminal plasma using mass spectrometry-based workflows
… semen lack precision, and the use of low fertile boars in breeding systems is prominent. Using mass spectrometry in fertility studies has gained momentum in the race for new markers of fertility and semen cryopreservation. Therefore, the aim of this study was to develop and optimise a mass …
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Correlative Analysis of Sperm Morphology, Seminiferous Epithelial Area and Testis Weight in the Boar
… month intervals, testes and epididymides of 300 boars were collected at an abattoir. Sperm samples from both right and left cauda epididymis of each boar were collected from which two groups were identified using the criterion in the frequency of sperm abnormalities. Group A (Normal) had a …
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Interaction of number of boar sperm and insemination timing on fertility following induced ovulation
… at 96 h post-weaning. Sows received fence-line boar contact once daily 3 to 6 d following weaning. Sub-populations of sows (n = 499) were assessed for follicle size and ovulation utilizing ultrasound at 8 h intervals. Of all sows, 88% expressed estrus within 6 d of weaning. At time of OvuGel® …
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Conflicts surrounding the establishment of wild boar (Sus scrofa) in the Forest of Dean, UK
In the Forest of Dean, forty to sixty wild boars were released in 1997 and 2004, these wild boar populations converged and grew into a population of nearly two thousand by 2015 after a six-hundred-year absence. Human-wild boar conflict started to occur in both wild areas and human areas due to …
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Factors affecting post-thaw quality of cryopreserved boar sperm and its effect on gilt fertility
… to fully utilize the potential of frozen-thawed boar sperm (FTS). Two experiments were performed to evaluate factors affecting the fertility of FTS. Experiment one determined the effect of thawing rate of FTS and its effect on post-thaw quality. Ejaculates (n = 15) used were obtained from 13 …
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Electron paramagnetic resonance dosimetry and the use of Japanese wild boar tooth enamel as a dosimeter for reconstruction of lifetime external absorbed doses from the Fukushima Exclusion Zone
… to establish characteristics of Japanese wild boar tooth enamel in the region of 0.25 – 12.0 Gy and to reconstruct external doses to wild boar native to the Fukushima Exclusion Zone using Electron Paramagnetic Resonance Dosimetry. The significance of Japanese wild boar in their ecosystem and …
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Genetic characterisation of six novel African swine fever viruses isolated from a pig, warthog, wild boar, and ticks
… is a disease that affects domestic pigs and wild boars, resulting in up to 100% case fatality rate, and there is currently no effective treatment or vaccine. To date, there are 67 ASFV complete genome sequences available, but most of the sequences represent only genotypes I-V and VII-X of the 24 …
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Effect of vaccination against porcine circovirus type 2 (PCV2) on ejaculate characteristics and the shedding of virus in boar semen
… circovirus type 2 (PCV2) can be shed into boar semen, raising the possibility that artificial insemination may be an important route by which disease associated with PCV2 is transmitted. The objective of this experiment was to determine the effect of vaccination against PCV2 on ejaculate …
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Managing the lactating sow to stimulate lactation ovulation
… lactation housing; and fence, or full physical, boar exposure. The importance of a reduced suckling input was demonstrated in Chapter Two. The proportion of sows expressing a lactation oestrus increased as the number of piglets weaned on day 18 of lactation increased from zero, three, five to …
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Defining Mechanisms Contributing to Porcine MHC Class II Diversity
… at both MHC loci, between the domestic and Wild boar populations. The European and Asian domestic populations exhibited a higher level of DQB amino acid diversity (0.093 and 0.093, respectively) when compared to the respective Wild boar populations (0.047 and 0.055). Conversely, analyses of DRB1 …
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Proportional assessment of X and Y chromosome-bearing spermatozoa in bull and boar ejaculates using conventional and real-time PCR techniques
… used to quantify %Y-CBS in the same ejaculates. Boar ejaculates were also analyzed with both techniques and compared to the percent male piglets in litters resulting from the assayed ejaculates. Collection day (P<0.0001) significantly affected %Y-CBS as determined by both PCR methods. Ejaculate …
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The effect of interval between inseminations and semen handling on in-vivo and in-vitro fertility of frozen-thawed boar sperm
… to capitalize on the potential of frozen-thawed boar sperm (FTS), due to the biological sensitivity of the sperm cells and the lower resulting pregnancy rates and litter sizes. This thesis will outline the current swine reproductive production practices, provide a brief history of boar sperm …
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