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 99 for “"Post-weaning"”.
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Post-Weaning, Early Gestation Sows: Housing and Welfare
… on the behavioral and psychological welfare of post-weaning, early gestations sows in relation to their housing condition. The goal of this study was to observe and compare the behavior of post-weaning, early gestation sows housed in three different housing types: gestation stalls, individual …
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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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Performance and economic comparison of conventional and non-conventional post-weaning calf management systems
… management systems based on starting weight at weaning: Heavy (HV) = direct-entry finish, 295 kg average, Medium (MD) = short background to finish, 250 kg average, Light (LT) long background to finish for weaned steers, 205 kg average, (n=4 in year 1 and 2, respectively) using conventional …
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Lowered reproduction efficiency as a correlated response to selection for increased post-weaning gain in laboratory mice
… efficiency in mice selected for increased post-weaning gain. Four experimental groups were established: (1) Group C, the two control lines; (2) Group S, the four selected lines; (3) Group CS, the F₁ progeny from the 4 control line X selected line crosses; (4) Group SS, the F₁ progeny from 6 …
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Post-weaning development of beef bulls: impacts of omega-3 supplementation and accuracy of nutrient requirement-based predictions
… effects of omega-3 fatty acid supplementation on post-weaning development of beef bulls and (2) the accuracy of nutrient requirement model predictions for feed intake and growth in developing bulls. In the first study, spring-born Angus, Hereford, and Simmental bulls were weaned each September and …
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Adult behaviour and cerebral cell densities after maternal or post-weaning consumption of an obesogenic diet in mice
… and cerebral cell densities after maternal or post-weaning consumption of an obesogenic diet in mice Emily Jane Mort Maternal obesity during pregnancy impairs cardiometabolic health of the adult offspring in experimental animals, and is associated with behavioural and cognitive impairments in …
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The Effects of Low Stress Cattle Handling and Weaning Training on Post-Weaning Weight Gain and Calf Activity
… gain and calf activity associated with the weaning process. Cattle were of Angus and Angus cross breeding from two separate herds in Virginia. Handlers for the LS groups went through a short training session. Handlers for the Control (C) groups did not have any special training and handled …
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Effects of microbial phytase in pig diets on calcium requirements, post-weaning growth performance, phytate degradation, and nutrient digestibility
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Duodenal and ileal digestibility of dietary nutrients and endogenous protein losses in pre- and post-weaning young dairy calves
… gastrointestinal health and growth in pre- and post-weaned calves. The objectives of the series of experiments included in this dissertation were to (1) evaluate our capacity to successfully place a duodenal and ileal cannula in young calves, (2) analyze the effect of the inclusion of an …
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Emotionality and intelligence in the hooded rat as a function of different periods of post-weaning rearing in a "meaningful" environment
4 groups of Ss ( N = 24 ) were exposed for different lengths of time to a situation where the variable of "meaningfulness" (in terms of contingency of food and water presentation on behaviour) was manipulated. Predicted differences in weight gain and emotionality but not in problem-solving ability …
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The Effect of Copper and Zinc Source on Pre-Weaning Performance of Cows, Health and Performance of Suckling Calves, and Post-Weaning Feedlot Performance, Carcass Composition, and Meat Quality of Calves
… were to determine if source of gestational and post-natal Cu and Zn affects cow reproductive performance, calf health, feedlot performance, carcass traits, and overall meat quality. Commercial cows primarily of Angus genetics (n=287) were randomly assigned to 1 of 2 treatment groups: 1) …
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Characterisation of physiological and immune-related biomarkers of weaning stress in beef cattle
Weaning is a necessary husbandry practice in which nutritional, social, physical and psychological stressors are imposed on the beef calf causing alterations in behavioural and physiological responses. To date, few studies have examined the effect of weaning on the extended physiological and …
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INVESTIGATION OF ACUTE STRESS IMPACT ON NURSERY PIG GASTROINTESTINAL FUNCTION AND ABILITY OF BIOACTIVE COMPONENTS OF GARLIC TO MITIGATE STRESS-INDUCED PHYSIOLOGICAL CHANGES
… were conducted to determine the effect of post-weaning feed and water deprivation on nursery pig growth performance, gastrointestinal function, and ability of garlic-derived diallyl disulfide (DADS) and diallyl trisulfide (DATS) to mitigate deprivation-induced effects. For the first …
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Influence of dietary component manipulation and feed management strategies on growth and rumen development of weaned dairy heifers
… the industry, but opportunities exist to improve post-weaning heifer nutrition and management. We aimed to evaluate common feed management strategies seen in the industry and their effects on growth, feed efficiency (G:F), and rumen development of calves from birth to 8 mo of age using pen- and …
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Effects of Variation in Early Growth Rate of Pigs on Subsequent Growth Performance
… P < 0.001) at birth were heavier ( P < 0.001) at weaning and had greater (P 0.05) gain:feed, and required fewer days (7) to reach 110 kg BW. In contrast, feeding supplemental milk replacer to piglets during lactation accelerated early growth rate, but had little impact (P > 0.05) on growth …
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Field comparison of intranasal and injectable bovine respiratory disease vaccination on beef calf antibody concentrations, average daily gain, and bovine respiratory disease morbidity
… at birth, ‘‘turnout’’ (~2 months of age), and weaning. Blood samples and weights were collected at ‘turnout’, two weeks post ‘turnout’, weaning, and two weeks post weaning, with weights also being collected at birth and 87 days post weaning. Blood samples were analyzed with an ELISA for bovine …
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Effects of Stress on Several Immune and Health Responses of Weanling Calves
The effects of weaning stressors on several immune and health responses were measured in three experiments. Sixty-four beef calves from 2 sources were bled on d - 7 (pre-weaning), 0 (weaning), 7, 14, and 21 (post-weaning). Serum selenium (Se), neutrophil and lymphocyte counts, and glutathione …
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Reducing crude protein levels in diets fed to young pigs to optimize growth performance and intestinal health
… fed to weanling pigs on growth performance, post-weaning diarrhea (PWD), blood characteristics, gut morphology, and products of protein fermentation. Both experiments used the same formulation of 3 corn-soybean diets to generate 3 experimental treatments: 3 diets contained 22% and 19% CP that …
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NUTRITIONAL STRATEGIES FOR IMPROVING THE SUSTAINABILITY OF SWINE FARMING
… as an ingredient to improve the health status of post-weaning piglets. The first research project evaluated a commercial Yucca schidigera extract, with 10.8% of saponins, through an in vitro and in vivo trial. The in vitro study aimed to identify the optimal dose to test in the in vivo trial and …
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