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Pregnancy Influences On The Rumen Environment Of Angus Heifers Differing In Feed Efficiency, Miranda Gabrielle Martin
Pregnancy Influences On The Rumen Environment Of Angus Heifers Differing In Feed Efficiency, Miranda Gabrielle Martin
Masters Theses
With an expected increase in population by 2050, the demand for more animal protein will increase. To improve the sustainability of US cattle production, producers and researchers have historically focused on improving the feed efficiency of steers, producing a more marketable beef product. However, without a successful pregnancy, there would be no marketable animal to feed. The objective of this study was to examine the physiological changes that occur during pregnancy and their impact on the rumen microbial communities and the correlation to feed efficiency status in Angus heifers. Utilizing 17 cannulated Angus heifers, feed efficiency data was previously collected …
Effect Of Soy Co-Products In Supplements For Grazing Cattle On Growth, Complete Blood Cell Counts, And Physiological Response Following A Lipopolysaccharide Challenge, Bralee Lansdell
Biological Sciences Undergraduate Honors Theses
The objective of this study was to determine the effect of soy co-products (soybean meal and soy oil) in the diet on the growth and hemocytology of cattle during a 56-day growing phase and the physiological/behavioral response to an endotoxin challenge. Angus crossbred steers (n = 36; 289 ± 31 kg, initial body weight ± SD) were stratified by body weight and sire; and assigned randomly to pastures (n = 9; 0.45 ha/mixed-grass pasture). Pastures were assigned randomly to 1 of 3 dietary treatments: 1) a control supplement containing no soy co-products, 2) a supplement containing soybean meal, or 3) …
Evaluation Of Anaplasma Marginale Elisa Positive Cattle For Co-Infection With Ehrlichia Spp., Grayson Robbins
Evaluation Of Anaplasma Marginale Elisa Positive Cattle For Co-Infection With Ehrlichia Spp., Grayson Robbins
Animal Science Undergraduate Honors Theses
Bovine Anaplasmosis is an infectious, hemolytic disease transmitted by the rickettsia parasite Anaplasma marginale in cattle. A. marginale parasitizes the red blood cells of an animal throughout their lifetime. The beef cattle industry is the fifth largest agricultural commodity in Arkansas, so potential economic losses due to bovine anaplasmosis is a critical issue. Previously tested beef cattle herds at the University of Arkansas’ Savoy and Batesville units have tested seropositive for A. marginale with low percent inhibitions; however, all seropositive animals tested negative for infection on DNA analysis. The objective of this study was to determine the current infection status …
Increasing Efficiency Of Finishing Beef Production: Strategies To Optimize Starch Digestion, Improve Flake Quality, And Reduce Methane Emissions, Ronald J. Trotta
Increasing Efficiency Of Finishing Beef Production: Strategies To Optimize Starch Digestion, Improve Flake Quality, And Reduce Methane Emissions, Ronald J. Trotta
Theses and Dissertations--Animal and Food Sciences
To continue to meet the demands of increasing food production and environmental sustainability, new strategies are needed to enhance the efficiency of finishing cattle production. A review of the literature identified several nutritional and physiological constraints that limit the ability for cattle to digest starch and absorb glucose from the small intestine. Comparative sequencing analyses revealed a missing region of the sucrase-isomaltase protein which could affect the capacity for starch digestion in cattle. Post-flaking sampling and handling recommendations were generated based on a series of experiments to improve estimates of starch availability and flaking consistency for commercial feedlots and laboratories. …