Browsing Auburn Theses and Dissertations by Author "Pacheco, Wilmer"

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Effect of dietary inclusion of corn from different origins on metabolizable energy, amino acid digestibility, growth performance, carcass traits, and nutrient digestibility of broilers.

Vargas Patino, Jose Isaac (2022-12-02) ETD File Embargoed

Corn is an important feed ingredient of broiler diets due to its high content of apparent metabolizable energy (AME). Additionally, its high inclusion in diets makes it a non-negligible source of crude protein (CP) and ...

Effect of Eggshell Translucency and Color on Broiler Egg Hatchability and Chick Quality and its Relationship with Other Eggshell Quality Parameters

Orellana Galindo, Leticia (2023-11-29) ETD File Embargoed

A successful hatch has a considerable economic impact on the poultry industry. The relationship between eggshell quality and hatchability has been demonstrated over the years through parameters such as thickness, eggshell ...

Effect of incubation temperature variation and genetic selection on broiler chicken growth performance, skeletal muscle growth characteristics, and meat yield

Tejeda, Oscar (2018-11-14)

Throughout the last 5 decades, the broiler industry has focused its efforts toward higher meat yields and more efficient production, leading to the adoption of state-of-the-art technology for production and as a way of ...

Effect of maternal and post-hatch supplementation of 25-hydroxycholecalciferol on duodenal crypt cell proliferation and local innate immunity of broiler chickens

Leiva Murcia, Samuel (2021-12-01) ETD File Embargoed

Previously published studies have demonstrated that maternal supplementation of the circulating metabolite of vitamin D3 (D3), 25-hydroxycholecalciferol (25OHD3) enhances immunocompetence of broiler chick offspring. In ...

Effect of pre-pelleting whole corn inclusion on growth performance, processing yield, meat quality, gut microbiome, and digestive organ development at different grow-out phases of broilers.

Ovi, Fozol (2020-11-16)

Corn is typically ground before its incorporation into broiler diets. However, grinding is the second most expensive cost center of feed manufacturing after pelleting. Therefore, feeding whole corn can be an alternative ...

Effects of Assay Methodology and Standardization for Endogenous Losses of Energy on Determination and Additivity of Metabolizable and Digestible Dietary Energy for Broilers

Philpot, Stephanie (2022-11-16) ETD File Embargoed

Efficient broiler production requires providing birds with diets with appropriate energy density. A lack of additivity of dietary energy could lead to under- or over-supplying energy to broilers. Additivity may be affected ...

Effects of feeding reduced crude protein diets while maintaining essential amino acids and total glycine + serine concentrations on growth performance, nitrogen excretion, plasma uric acid concentrations, and carcass characteristics of broilers

Kriseldi, Ruben (2016-10-04)

An excessive reduction of crude protein (CP) content in broiler diets has been resulting in poor growth performance. This may be due to sub-optimum concentrations of Val, Ile, Arg, and Trp. Additionally, total Gly + Ser ...

Effects of high dietary copper concentration on growth performance, processing characteristics, amino acid digestibility, and ileal microflora composition of broilers

Philpot, Stephanie (2019-07-09)

Subtherapeutic antibiotics have been added to diets to improve growth performance of broilers. Pressure from the food service industry is reducing the use of this practice, so the broiler industry is evaluating alternatives ...

The Effects of Phytase and Non-starch Polysaccharide Enzymes in Poultry Production

Gulizia, Joseph (2021-11-19) ETD File Embargoed

Feed is the largest expense in broiler production; therefore, feed additives have become commonplace in broiler diets to reduce feed cost and improve live performance. Exogenous enzymes have been used for over 50 years to ...

Evaluation of Differential Scanning Calorimetry as a Potential Methodology to Assess Starch Gelatinization in Commercial Poultry Diets Thermally Processed under Multiple Retention Time and Temperature Combinations

Spencer, Lindsey (2019-08-03) ETD File Embargoed

Starch is known to gelatinize in the presence of heat and water during thermal processing; thus, causing the unraveling of the starch granule. The occurrence of starch gelatinization in diets having high inclusions of ...

Evaluation of Feed Manufacturing on Feed Quality, Performance, Nutrient Utilization and Carcass Characteristics of Broilers

Rueda, Martha (2020-11-17)

Previous studies have shown corn particle size and feed form manipulation influence broiler performance, gizzard development, nutrient utilization, and carcass characteristics. It is well-known that feeding pellets reduces ...

Microbiological Evaluation of Commercially Manufactured Animal Feeds to Determine Presence of Salmonella, Escherichia coli and Clostridium perfringens

Munoz, Luis (2020-07-14)

Animal feed can potentially expose animals to pathogens which may lead to infection or colonization of the gastrointestinal tract (GIT). Feeds can become contaminated with bacterial pathogens during harvesting/transportation ...

A new methodology to measure internal particle size in pellets and to quantify the degree of grinding during pelleting

Bonilla, Susan (2022-11-29) ETD File Embargoed

Grinding and pelleting are the major costs during feed production. Previous research has shown that ingredients’ particle size can influence poultry performance, organ development, and nutrient digestibility. Particle ...

The Potential for Refeeding Syndrome in Broiler Breeders

Gould, Brendan (2017-07-27)

Sudden death at the initial point of lay in broiler breeders has long been an under-researched issue that results in a mortality of 0.5%-2% from 5%-30% egg production in breeder females. This mortality has been labeled as ...