Browsing Animal Sciences Doctoral Work by Issue Date
Now showing items 1-20 of 30
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Genetic Markers, Cattle Disposition, and Stress Relative to Variations in Beef Tenderness
(North Dakota State University, 2012)The objective of this research was to evaluate the efficacy of genetic markers, disposition, and animal stress on variations in beef tenderness. Warner-Bratzler shear force (WBSF) values on 570 mixed breed heifers and ... -
The Role of Maternal Protein Intake During Late Gestation on Placental Vascular Function
(North Dakota State University, 2013)Global nutrient restriction or excess can influence umbilical hemodynamics in sheep fetuses (Chapter 2). We hypothesized that a specific component of the diet, namely maternal metabolizable protein (MP), would alter placental ... -
Influence of Cut, Cooking Method, and Post-Mortem Aging on Beef Palatability
(North Dakota State University, 2013)The objectives of these studies were to determine the effects of cut, cooking method, and postmortem aging on improving consumers' perception of beef. Consumers evaluated bottom round, top sirloin, ribeye, and a value cut ... -
Impacts of Beef Cow Nutrition on Conceptus Development
(North Dakota State University, 2013)Two experiments were conducted to determine the effect of maternal nutrient restriction followed by realimentation during early to mid-gestation on uterine blood flow (BF), maternal performance, and conceptus development ... -
Supplementing Metabolizable Protein to Ewes during Late Gestation: Effects on Ewe and Offspring Performance
(North Dakota State University, 2013)We hypothesized that MP intake at or above requirements during late gestation would improve dam and offspring performance. In year 1, ewes received one of three isocaloric dietary treatments during late gestation: 60MP1: ... -
Effects of Maternal Nutrition During Gestation on Viscera Energy Use in Ruminant Dams and Offspring and Hypothalamic Neurohormone Content in the Offspring
(North Dakota State University, 2015)The extensive use of grazing systems for ruminant livestock and the high variation in forage quality throughout the year have important impacts on production. Changes in feed quality and availability cause alteration in ... -
The Effects of the Nitric Oxide (NO) System and Nutritional Plane on Ovarian Function
(North Dakota State University, 2015)Researchers predict a world population of approximately 9.5 billion people by the year 2050. Current resources, including the amount of meat that is produced, would not be able to sustain that population. Therefore, the ... -
Independent Methods to Improve Meat Quality Including Genetic Technologies, Modified Processing, and Growth Promotants in Beef
(North Dakota State University, 2015)Three independent studies were done to investigate how genetic factors, carcass management, and exogenous growth promotant programs influence meat quality attributes, palatability, and protein expression in beef. The first ... -
The Impact of Reproductive Technologies on Beef Cattle and Management
(North Dakota State University, 2016)Two experiments were conducted to evaluate producer management decisions that may impact beef cattle reproductive efficiency. The over-arching hypothesis was that critical breeding management decisions would positively ... -
Maternal Nutritional Plane and Endogenous Retroviral Gene Elements, Pregnancy Hormones, and Placental Vascularity and Angiogenic Factors during the Establishment of Pregnancy in Beef Cattle
(North Dakota State University, 2016)In order to meet the projected food demands by 2050, animal agriculture must increase production of animal products on the same or decreased land area through increased efficiency. Early gestation is one area to increase ... -
The Impact of Age and Level of Nutrient Consumption on Pancreatic Insulin Production in Ruminants
(North Dakota State University, 2016)Video summarizing Ph.D. dissertation for a non-specialist audience. -
The Impact of Digestive Enzymes in the Ruminant Animal
(North Dakota State University, 2016)Understanding the enzymatic activity in ruminant digestive systems is essential for securing adequate growth, reproduction and overall metabolism. In order to evaluate the impact of various nutritional sources and dietary ... -
Reproductive and Nutritional Impacts of Dried Distiller's Grains with Solubles on Growing Rams and Feedlot Lambs
(North Dakota State University, 2017)Byproduct supplementation in livestock rations is viable and can lead to increased returns to producers. Increasing the inclusion of dried distiller’s grains with solubles (DDGS) was hypothesized to increase growth performance ... -
Computer Vision System as a Tool to Estimate Pork Marbling
(North Dakota State University, 2017)Currently pork marbling is assessed subjectively in the industry, because of the limited methods and tools that are suitable for the industry. In this dissertation, we are devoted to develop a computer vision system for ... -
The Effects of Maternal Diet on Passive Transfer of Immunity to the Neonatal Beef Calf, and Calf Immune Response to Vaccination and Immunostimulants
(North Dakota State University, 2018)To investigate the effects of maternal diet on passive transfer of immunity to the neonatal beef calf, and calf immune response to vaccination and immunostimulants, three experiments (Exp.) were completed. Results from ... -
Effects of Replacing Supplemental Sucrose with Beef During Mid to Late Gestation on Maternal Health and Fetal Growth and Development Using a Sow Biomedical Model
(North Dakota State University, 2019)Americans consume three percent more total daily calories from sugar than current recommendations. Maternal diets high in sugar can cause obesity and diabetes mellitus. Objectives were to compare supplemental dietary sucrose ... -
Effects of Nutrient Restriction, Realimentation, and Twinning on Plasma Volume, Umbilical Hemodynamics and Placental Characteristics in the Pregnant Adolescent Ewe
(North Dakota State University, 2019)Reproductive physiology in production animals is a key economic component of longevity and profitability of animal farming. There are several components that can benefit or compromise adequate pregnancy periods. Sheep ... -
Maternal Nutrition, One-Carbon Metabolites, and Programming of Fetal Development During Early Gestation
(North Dakota State University, 2019)Crossbred Angus heifers (n = 14) were bred via AI, assigned to nutritional treatment (CON = 100% of requirements for 0.45 kg/d gain and RES = 60% of CON) and ovariohysterectomized on d 50 of gestation. Fetal liver, muscle ... -
Factors Affecting Testicular Growth and Development in the Beef Bull
(North Dakota State University, 2019)At present no single parameter can predict potential daily sperm production (DSP) in bulls. Sertoli cells (SC) are responsible for nourishing and providing physical support to germ cells (GC) throughout spermatogenesis. ... -
Energy and Mineral Supplementation Strategies for Beef Cattle Grazing the Northern Great Plains
(North Dakota State University, 2019)Four experiments were conducted to evaluate different technologies and supplementation strategies that may impact beef cattle production in the Northern Great Plains. Our overarching hypothesis was that we can enhance beef ...