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 136 for “"sows"”.
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Post-Weaning, Early Gestation Sows: Housing and Welfare
… expressing concern for the welfare of breeding sows in our food systems and are influencing markets rapidly through both their buying and voting choices. As producers necessarily begin to shift towards decreased breeding sow housing confinement, there is a need for nuanced information about the …
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Comparative Amino Acid Digestibilities in Growing Pigs and Sows
… the extent to which gestating and lactating sows are able to digest amino acids. A procedure for surgically inserting a T-cannula in the distal ileum of gestating sows was developed, and ileal fluid was successfully collected from sows in gestation as well as in lactation. It was shown that …
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Evaluation of a cool pad for thermoregulation in sows
… alleviating heat stress in farrowing and open sows. Different physiological and behavioral variables were analyzed during exposure of the animals to acute or long term heat stress in these studies. The physiological variables measured included: respiration rate (RR), rectal temperature (Tr), …
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The effect of ketamine on stereotypic behavior in pregnant crated sows
… welfare. Common stereotypies of pregnant sows housed in gestation crates include the oral/nasal/facial (ONF) behaviors of rooting, bar-biting, and vacuum chewing. One hypothesis to explain these behaviors is that crated sows experience poor mental welfare and that ONF stereotypies are a …
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Detecting estrus in sows using a robotic imaging system and neural networks
… is crucial to reproductive management of sows. Due to the longevity of the sperm and eggs, achieving timely and accurate estrus detection can lead to higher conception rates, larger litter size, and lower non-productive days. However, for decades, estrus detection still relies on manual …
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Postweaning anestrus in the sows: Effect of the low-energy diet during lactation
… onset of estrus following weaning in primiparous sows. Our first goal was to determine whether LE intake during lactation causes a postweaning imbalance in reproductive and metabolic hormones. Effects of a decreased level of dietary energy intake during lactation on plasma concentrations of …
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Evaluation of the behavior of sows from weaning to 10 days post-weaning
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Comparative digestibility of energy and nutrients in diets fed to sows and growing pigs
… (ATTD) of nutrients is greater in gestating sows fed close to the maintenance requirement than in growing pigs allowed ad libitum access to diets. Therefore, there is a need in North America to generate separate digestibility values for gestating sows and growing pigs as only 1 energy value …
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Evaluation of glucose supplement provided with enrichment to reduce hunger induced stress in gestating sows
… and physiology of feed restricted pregnant sows. First parity pregnant sows (N =36) with an average weight of 200 kg were randomly assigned into three treatment groups: negative control group sows were not provided with AHBs with enrichment (NEG), positive control sows were provided with …
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Role of conceptus-induced vasodilation in controlling utero-ovarian function of ewes, cows and sows
… maintenance of corpora lutea (CL) in cows and sows. Experiment I: Uterine arteries (UA) were collected from follicular phase (FP; Days 19-21; n = 8) or luteal phase (LP; Day 13; n = 7) nonpregnant (NP) gilts and from pregnant (P; Day 13; n = 7) gilts. Although UA from FP and P gilts ahd reduced …
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Assessing the well-being of gestating submissive sows in group pens using multiple welfare metrics
… today, specifically how to keep gestating sows. Internationally, many countries such as the European Union, Canada, and Australia, as well as some states within the U.S. have banned gestation crates. Consumer and legislative pressure have been the greatest push for these changes, despite …
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Energy values in pistachio shell powder and soybean hulls fed to gestating and lactating sows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Effect of fenbendazole on shedding and embryonation of Ascaris suum eggs in naturally infected gestating sows
… with A suum were conducted. Breeding gilts and sows were identified with natural A suum infections and allocated to one of 4 treatments: CNT = untreated controls, TX1 = 545.5 mg fenbendazole for one day, TX2 = 545.5 mg fenbendazole daily, for 3 consecutive days (1636.5 mg total), and TX3 = …
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A pilot study on the effects of a yeast probiotic on sow and piglet behavior and well-being
… industry. Thus, we hypothesize that feeding sows probiotics during gestation and lactation could potentially improve health and well-being of not only sows but her piglets’ as well. The objectives of this study were to: (a) evaluate the effects of feeding a bolus of yeast Saccharomyces …
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The Effects of Dry Sow Housing Conditions on Welfare at Farrowing
… of piglets weaned per litter. Stall-housed sows gave birth to the most piglets per sow per year, but also had the highest piglet mortality. Overall, piglet mortality was higher in farrowing pens than in crates. Sows from the large group had a significantly larger number of returns to service …
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A Comparison of Pregnant Mare Serum Gonadotropin and P.G. 600® to Improve Reproductive Efficiency in Sows
Three hundred and nineteen sows were utilized to study the effects of pregnant mare serum and P.G 600 on reproductive efficiency. Sows were randomly allotted to treatments. Sows were evaluated for age (# of parities), breed composition and body condition score. Three sows who shared all three …
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The effects of high fiber diets and feeding partitions on the well-being of group-kept sows
… mandates. One of the main concerns with housing sows in groups is the increased aggression at mixing and around limited resources, especially feed and water. Grouped-housed sows establish a social hierarchy upon mixing which often reduces aggressive encounters later-on (Greenwood et al., 2014; …
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