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 16 of 16 for “"Feed withdrawal"”.
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Effect of feed withdrawal and strain on laying performance and egg quality of white and brown Hy-Line layers
… of the study was to investigate the effects of feed withdrawal and strain on laying performance and egg quality of White and Brown Hy-line layers. Fifty four hens for each strain (White Hy-Line and Brown Hy-line) aged 18 weeks (point of laying stage) were used in the investigation. Feed …
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Evaluation of feeding different sources and levels of distillers dried grains with solubles (DDGS) with corn and soybean hulls in non-feed-withdrawal molt programs for laying hens
… hens can be successfully molted by ad libitum feeding various levels and sources of DDGS. In the first study, three sources of DDGS varied greatly in color. Treatment 1 consisted of a 47% corn (C):47% soy hulls (SH) molt diet (C:SH) fed for 28 d (positive control). Treatments 2, 3 and 4 were …
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The influence of catecholamines on energy metabolism beef colour and tenderness in three commercial beef breeds
Feed restriction and handling of animals destined to be slaughtered have are two factors that affect meat quality negatively. Where handling of slaughter animals is inevitable, fasting is applied to meat producing animals in the ante mortem period to minimise microbial contamination of carcasses or …
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Water Consumption Behavior in Broilers
… of birds drinking while on pre-slaughter feed withdrawal. Birds were evaluated at four, hourly intervals after feed had been withdrawn. It was found that there was no significant difference between the percentage of birds drinking during each hour of feed withdrawal when compared to birds …
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Campylobacter jejuni infection versus contamination of turkeys and chickens
… (21 and 32°C) and three different times of feed withdrawal for chickens (3, 6,and 9 hours and turkeys 0, 4, and 8 hours). Birds were then slaughtered and the carcasses were sampled to determine the level of Campylobacter jejuni that survived. Results indicated a difference between chickens …
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Factors involved in the control of plasma thyroid hormone concentrations during an induced molt in the domestic hen
… it with the traditional method of temporary feed withdrawal (FW). Molting mechanisms were also studied. Molt was induced by infusion of a gonadotropin releasing hormone agonist (GnRH-A; (D-Leu$\sp6$,Pro$\sp9$) -GnRH N-ethylamide), and compared with molt induced by FW. Hens were divided into …
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Stress response and habituation as influenced by nutritional and thermal factors in dwarf and normal chickens
… ratios declined in a quadratic manner with age. Feed restriction elicited a similar stress response, as indicated by H/L ratios in dwarfs and normals with the effect of adapting to fasting having dissipated between 12 to 16 days. Resistance to Eimeria tenella infection was greater in normals than …
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Characterization of Broiler Lines Divergently Selected for Breast Muscle Color
… at 5 wks. Experiment 3 looked at the effect of feed-withdrawal times. Birds were separated randomly be line into groups and feed was removed at 0, 6, 12, 18 and 24h prior to processing. Line differences were detected for color and pH but not for treatment groups. In muscle color lines, …
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Management and Nutritional Approaches to Reducing Glycolytic Potential and Stress Responses in Pigs
… blood acid-base responses to handling, but feed withdrawal and high dietary fat level reduced (P < 0.05) muscle GP. However, handling induced-depletion of muscle GP was higher (P < 0.05) in fasted than in fed pigs receiving control or high fat diets. When low carbohydrate diet with either …
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Understanding the development of gut microbiota and effect of Salmonella Typhimurium infection on gut microbiota in layers
… due to shifting to production shed, change in feed, transportation stress, the onset of lay. Different enteric pathogens and stressors can disrupt the gut microbiota composition and significantly reduces the richness and diversity of gut microbiota. In chapter 4, the effect of Salmonella …
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Constant current electronarcosis of market poultry
… 140 days. Pre-stun levels of 3, 5 and 8 hours of feed and water withdrawal were used for each weight class and sex. The effect of sex, weight and feed and water withdrawal on stunning efficiency, recovery time, blood splatter, bone breakage, color and pH of the breast meat was determined. The …
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Modulation of cell yields and genetic responses of Salmonella fermentation and colonization in the gastrointestinal ecology of avian species
… similarity coefficient (>90%) than the feed deprived treatment group. Fermentation response from cecal inocula on feed substrates revealed that alfalfa based samples yielded consistently higher short chain fatty acid levels when compared to other feed substrates. Salmonella Enteritidis …
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Evaluating the Impact of an All-Vegetable Protein Supplement Containing Fat Emulsifiers and Probiotics on Broiler Performance
… for integrators. Given the rapidly changing feeding strategies necessary to respond to consumers’ and wholesalers’ demands for this niche poultry, this study assesses new feeding approaches to compare their economic viability. This study focuses on the effects of feeding a proprietary …
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An investigation of centrifugal blood-cell separation
… centrifuge (using a seal-less, anti-twisting feed/withdrawal system) containing, a 25-ml capacity separation chamber. The blood separation chamber had dart-shaped geometry in the radial plane and a constant depth in the axial direction. Separation experiments were performed on whole bovine …
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Effects of Animal Handling and Transportation Factors on the Welfare, Stress Responses, and Incidences of Transport Losses in Market Weight Pigs at the Packing Plant
… pigs during transport (mixed vs. unmixed) and feed withdrawal prior to loading (0 vs. 24 h) were evaluated. Although not statistically significant, transport losses were numerically reduced by ∼50% for pigs that were fasted 24 h prior to loading and for pigs that were not mixed during …
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Poultry Performance and Food Safety Impacts of Selected Organic Acids and Probiotics
… showed reductions in body weight loss during feed withdrawal and transportation, and meat quality improvement of broilers during commercial conditions. In the third study, organic acid mixtures were used in wash solutions for the reduction of spoilage and foodborne bacteria from chicken skin. …