Open Access. Powered by Scholars. Published by Universities.®

Poultry or Avian Science Commons

Open Access. Powered by Scholars. Published by Universities.®

2214 Full-Text Articles 1896 Authors 179117 Downloads 65 Institutions

All Articles in Poultry or Avian Science

Faceted Search

2214 full-text articles. Page 1 of 38.

Transcriptome Analysis In Spleen Reveals Differential Regulation Of Response To Newcastle Disease Virus In Two Chicken Lines, Jibin Zhang, Michael G. Kaiser, Melissa S. Deist, Rodrigo A. Gallardo, David A. Bunn, Terra R. Kelly, Jack C.M. Dekkers, Huaijun Zhou, Susan J. Lamont 2018 Iowa State University

Transcriptome Analysis In Spleen Reveals Differential Regulation Of Response To Newcastle Disease Virus In Two Chicken Lines, Jibin Zhang, Michael G. Kaiser, Melissa S. Deist, Rodrigo A. Gallardo, David A. Bunn, Terra R. Kelly, Jack C.M. Dekkers, Huaijun Zhou, Susan J. Lamont

Jibin Zhang

Enhancing genetic resistance of chickens to Newcastle Disease Virus (NDV) provides a promising way to improve poultry health, and to alleviate poverty and food insecurity in developing countries. In this study, two inbred chicken lines with different responses to NDV, Fayoumi and Leghorn, were challenged with LaSota NDV strain at 21 days of age. Through transcriptome analysis, gene expression in spleen at 2 and 6 days post-inoculation was compared between NDV-infected and control groups, as well as between chicken lines. At a false discovery rate <0.05, Fayoumi chickens, which are relatively more resistant to NDV, showed fewer differentially expressed ...


New Control Strategy Against Temperature Sudden-Drop In The Initial Stage Of Pad Cooling Process In Poultry Houses, Xue Hui, Baoming Li, Hongwei Xin, Weichao Zheng, Zhengxiang Shi, Xiao Yang, Shumei Zhao 2018 China Agricultural University

New Control Strategy Against Temperature Sudden-Drop In The Initial Stage Of Pad Cooling Process In Poultry Houses, Xue Hui, Baoming Li, Hongwei Xin, Weichao Zheng, Zhengxiang Shi, Xiao Yang, Shumei Zhao

Agricultural and Biosystems Engineering Publications

Preliminary field measurements have shown substantial temperature sudden-drop (ΔTsd) at bird level in the initial stage of pad cooling process in arid regions of China. Such sudden temperature fluctuation can cause thermal stress to laying hens and this problem is attracting increasing concerns. The purpose of this study was to develop a new control strategy (NCS) to avoid or minimize ΔTsd while simplify the operational process. Theoretical calculation and field test were conducted in this study. The key ambient thermal factor affecting ΔTsd was analysed by calculating temperature drop of cooled air existing the cooling pad (ΔTd). A countermeasure was ...


Identifying Genetic Factors Influencing Sperm Mobility Phenotype In Chicken Using Genome Wide Association Studies, Primordial Germ Cell Transplantation, And Rnaseq., Sohita Ojha 2017 University of Arkansas, Fayetteville

Identifying Genetic Factors Influencing Sperm Mobility Phenotype In Chicken Using Genome Wide Association Studies, Primordial Germ Cell Transplantation, And Rnaseq., Sohita Ojha

Theses and Dissertations

Sperm mobility is a major determinant of male fertility in chicken. In spite of low heritability of reproductive traits, sperm mobility has high heritability index which suggests presence of quantitative trait loci (QTLs) governing the trait. Our research focused on three objectives: i) to identify the QTLs affecting low mobility phenotype in chicken, ii) to understand the impact of Sertoli-cells and germ cells interactions in influencing the mobility phenotype and iii) to identify the genes and gene networks differentially expressed in male and female PGCs. To detect the QTLs, genome wide association studies (GWAS) was conducted which revealed the presence ...


Time Series Forecast Analysis In Wholesale Broiler Markets, Christopher R. Sims 2017 University of Arkansas, Fayetteville

Time Series Forecast Analysis In Wholesale Broiler Markets, Christopher R. Sims

Theses and Dissertations

In 2016 the chicken industry provided nearly 1.2 million jobs, 68 billion dollars in wages, 313 billion dollars in economic activity and 24 billion dollars in government revenue (John Dunham & Associates, Inc., 2016). Broiler production has changed dramatically from the early 90’s to the turn of the 21st century. Technological advancements, continuous improvements, production efficiencies and industry changes have made the industry the global market it is today. The poultry industry is an extremely volatile market with prices constantly fluctuating in response to input price volatility and demand and supply changes. These changes are often driven by world economic conditions which impacts the roughly 20% of U.S. production that is exported. Due to these variations, accurate forecasting of poultry prices is difficult. Economic modeling is complex at best; this paper examines a comparison between vector autoregression (VAR) and autoregressive (AR) techniques. Urner Barry average monthly northeast wholesale poultry parts price data was used for this research. Parts analyzed are; drumstick (DRUM), jumbo boneless skinless breast tender out (BSBTO), leg quarter (LQ), thigh (THIGH), small wing (SMWING), jumbo wing (JMWING), tender (TENDER) and whole bird without giblets weighing 2 ¼ lbs. (WOG). This modeling will focus on the ...


Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter 2017 University of Minnesota - Duluth

Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter

Natural Resource Ecology and Management Publications

Climate change and habitat loss are projected to be the two greatest drivers of biodiversity loss over the coming century. While public lands have the potential to increase regional resilience of bird populations to these threats, long-term data are necessary to document species responses to changes in climate and habitat to better understand population vulnerabilities. We used generalized linear mixed models to determine the importance of stand-level characteristics, multi-scale land cover, and annual weather factors to the abundance of 61 bird species over a 20-year time frame in Chippewa National Forest, Minnesota, USA. Of the 61 species modeled, we were ...


Experimental Approaches To Understand And Control Salmonella Infection In Poultry, Yichao Yang 2017 University of Arkansas, Fayetteville

Experimental Approaches To Understand And Control Salmonella Infection In Poultry, Yichao Yang

Theses and Dissertations

Salmonella is a major foodborne pathogen around the world and chickens are the major reservoir to transmit Salmonella into the human food chain. For decreasing the infection of Salmonella, we developed six attenuated live vaccines based on Salmonella Enteritidis (SE) and Typhimurium (ST) for testing the cross-serovar and cross-serogroup protection from the challenge of Salmonella Heidelberg and Campylobacter jejuni. One of the constructed vaccine strain showed ability to protect against challenge from Salmonella Heidelberg. Even though some preventive approaches are able to decrease Salmonella colonization in the gastrointestinal tract of chickens or other farm animals, Salmonella transmission mechanisms remain unclear ...


Lead Poisoning In Bald Eagles Admitted To Wildlife Rehabilitation Facilities In Iowa, 2004–2014, Taylor Yaw, Kay Neumann, Linette Bernard, Jodeane Cancilla, Terese Evans, Adam Martin-Schwarze, Bianca Zaffarano 2017 Iowa State University

Lead Poisoning In Bald Eagles Admitted To Wildlife Rehabilitation Facilities In Iowa, 2004–2014, Taylor Yaw, Kay Neumann, Linette Bernard, Jodeane Cancilla, Terese Evans, Adam Martin-Schwarze, Bianca Zaffarano

Veterinary Clinical Sciences Publications

Eleven years (2004–2014) of bald eagle Haliaeetus leucocephalus data from four independent, state and federally permitted wildlife rehabilitators in Iowa were assessed for the prevalence of elevated lead levels in blood or tissue samples. The relationship between blood lead concentrations and recorded information (age, season, radiographs, and clinical outcome) was investigated. Adult birds had higher blood lead concentrations than immature and juvenile birds. Highest blood lead levels were found during October–January. Bald eagles with positive radiographs for metallic opacities in the digestive tract had higher blood and tissue lead concentrations than those with negative results or those on ...


Histomonas Elisa, Jessica L Martinez 2017 University of Tennessee, Knoxville

Histomonas Elisa, Jessica L Martinez

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

Histomonas meleagridis is a protozoan parasite of avians and is the causative agent in Histomonosis, commonly known as Blackhead Disease. Current methods for diagnosing the presence of H. meleagridis are limited to parasite culture or Polymerase Chain Reaction (PCR) to amplify target DNA. This project aims to develop an enzyme-linked immunosorbent assay (ELISA) for faster and more sensitive diagnosis of Histomonas infections. Cultures of H. meleagridis parasites were purified, and surface antigens were extracted using a spectrum of chemical solutions. The various antigen solutions were subjected to an ELISA, with serum from birds immunized for H. meleagridis as positive controls ...


Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter 2017 University of Minnesota - Duluth

Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter

Peter Wolter

Climate change and habitat loss are projected to be the two greatest drivers of biodiversity loss over the coming century. While public lands have the potential to increase regional resilience of bird populations to these threats, long-term data are necessary to document species responses to changes in climate and habitat to better understand population vulnerabilities. We used generalized linear mixed models to determine the importance of stand-level characteristics, multi-scale land cover, and annual weather factors to the abundance of 61 bird species over a 20-year time frame in Chippewa National Forest, Minnesota, USA. Of the 61 species modeled, we were ...


Evaluating The Impact Of Two Contrasting Tillage Practices On Soil Properties In Central Kentucky, Emily Cook 2017 Murray State University

Evaluating The Impact Of Two Contrasting Tillage Practices On Soil Properties In Central Kentucky, Emily Cook

Posters-at-the-Capitol

Farming practices such as no tillage and plowing can institute change on soil physical and chemical characteristics. In this research, the effects of long-term conventional and no-tillage systems on the selected soil properties were determined in a continuous corn system on a farm with Maury silt loam soil. These samples were taken from University of Kentucky's Research Farm (Spindletop Farm). The field used was tilled in 1969 from bluegrass sod and the first time research was conduced was in 1970. Each plot is 20 ft. by 40 ft. and for many years each plot was split with winter cover ...


Growth And Development Of Two Broiler Strains With Low Protein And Crystalline Amino Acid Supplemented Diets, Chaoyang Li 2017 Louisiana State University

Growth And Development Of Two Broiler Strains With Low Protein And Crystalline Amino Acid Supplemented Diets, Chaoyang Li

LSU Master's Theses

The objective of this research was to compare the growth performance of broilers from two commercial breeds with control, low protein and low protein supplemented with crystalline amino acids diets. This was a randomized block design, and identical experiments were conducted on successively in two years. In each experiment, day-old chicks, Ross 708 broilers and Cobb 405 broilers, were randomly assigned into three dietary treatments: 1) positive control, 2) low crude protein (LP), and 3) LP + crystalline amino acids (CAA). A three phase feeding program was used. Feed and water were provided ad-libitum. On d 12, 19, 26, 33, 40 ...


Distribution Of Type X Collagen In Tibiotarsi Of Broiler Chickens With Vitamin D Deficiency, Joseph S. Haynes, Jesse Goff 2017 Iowa State University

Distribution Of Type X Collagen In Tibiotarsi Of Broiler Chickens With Vitamin D Deficiency, Joseph S. Haynes, Jesse Goff

Joseph Haynes

Type X collagen is a significant component of the extracellular matrix of the hypertrophic zone of physeal cartilage, but its precise role in endochondral ossification has not been determined. The concentration of type X collagen increases in physeal cartilage in chicks with vitamin D deficiency. The purpose of our study was to determine whether defective endochondral ossification due to vitamin D deficiency was associated with abnormalities in the distribution of type X collagen in the proximal tibiotarsus of chicks. To accomplish this, we induced vitamin D deficiency in broiler chicks and sequentially evaluated the pattern of type X collagen immunoreactivity ...


The Effects Of Dietary Omega 3 Fatty Acids On Commercial Broiler Lameness And Bone Integrity From Hatching To Market, Bruno Evangelista, Alexandra Kastli, Zoe Kiefer, Amelia Rangel, Isa Ehr, Samaneh Azarpajouh, Cheryl Morris, Elizabeth Bobeck, Anna Johnson, Nicholas Gabler, Kenneth Stalder, Brian Kerr 2017 Iowa State University

The Effects Of Dietary Omega 3 Fatty Acids On Commercial Broiler Lameness And Bone Integrity From Hatching To Market, Bruno Evangelista, Alexandra Kastli, Zoe Kiefer, Amelia Rangel, Isa Ehr, Samaneh Azarpajouh, Cheryl Morris, Elizabeth Bobeck, Anna Johnson, Nicholas Gabler, Kenneth Stalder, Brian Kerr

Kenneth J Stalder

The objective of this experiment was to investigate how different dietary ω-3 sources affect lameness and bone integrity of commercial broiler chickens from hatching to finishing.One hundred and twenty male Ross308broiler chicks were assigned to three dietary treatments; control, flaxseed oil and fish oil for 4 consecutive weeks. From week 1 to 4, broilers were visually assigned a lameness score (2 non-lame to 5 non-ambulatory) anda bone integrity score (score 2 normal bones to 5 bird was non-ambulatory and was removed from the trial).There were no observed differences for the dietary treatmentand week interaction for lameness or bone ...


The Effects Of Dietary Omega 3 Fatty Acids On Commercial Broiler Behavior From Hatch To Market Weight, Ella Akin, Zoe Kiefer, Amelia Rangel, Isa Ehr, Samaneh Azarpajouh, Elizabeth Bobeck, Anna Johnson, Nicholas Gabler, Kenneth Stalder, Brian Kerr 2017 Iowa State University

The Effects Of Dietary Omega 3 Fatty Acids On Commercial Broiler Behavior From Hatch To Market Weight, Ella Akin, Zoe Kiefer, Amelia Rangel, Isa Ehr, Samaneh Azarpajouh, Elizabeth Bobeck, Anna Johnson, Nicholas Gabler, Kenneth Stalder, Brian Kerr

Kenneth J Stalder

The objective of this experiment was to investigate how different dietary omega-3 sources affect commercial broiler behavior from hatch to market weight. One hundred and twenty male 308 Ross broiler chicks were enrolled into the study. Three dietary treatments were compared; Control, Flaxseed-and Fish-oil. Fifteen pens were randomly selected and onefocal-bird was watched continually for three periods of time. One behavior, two postures,and an unknown category were collected. Week by dietary treatment interaction was not significant for any broiler behaviors (P ≥ 0.49). There was no dietary treatment effect observed for any broiler behaviors (P≥ 0.32). There was ...


Evaluating Long-Term Direct And Correlated Selection Response In White Plymouth Rock Chickens Selected For High Or Low 8-Week Body Weight, Sylvia Harrison 2017 University of Nebraska-Lincoln

Evaluating Long-Term Direct And Correlated Selection Response In White Plymouth Rock Chickens Selected For High Or Low 8-Week Body Weight, Sylvia Harrison

Theses and Dissertations in Animal Science

The increasing demand for poultry meat has led animal breeders to engage in artificial selection of chickens as a way to increase the productivity of poultry. Long-term experiments have been designed to measure rates of genetic response to a trait under selection, and correlated traits, as well as gauge possible selection limits.

Two studies were conducted to evaluate response to selection for body weight (BW) in chickens. The chickens were selected for high or low BW at 8 weeks of age. Those that met the criterion were selected as parents for the subsequent generation. In the first study the population ...


Astrovirus Infection In Hatchling Turkeys, Mari Thouvenelle, Joseph S. Haynes, Don L. Reynolds 2017 Iowa State University

Astrovirus Infection In Hatchling Turkeys, Mari Thouvenelle, Joseph S. Haynes, Don L. Reynolds

Joseph Haynes

Astrovirus is just one of several different enteric viruses identified in association with turkey viral enteritis, which has been a primary concern in the area of enteric diseases of turkeys, although the economic impact on the turkey industry is not fully known.1 Losses stem from the high morbidity of the disease resulting in decreased growth and flock unevenness. Additionally, this disease appears to be highly prevalent and geographically widespread. Astrovirus causes problems even for producers who employ good management practices in modem facilities.


Astrovirus Infection In Hatchling Turkeys: Alterations In Intestinal Maltase Activity, Mari L. Thouvenelle, Joseph S. Haynes, Jerry L. Sell, Don L. Reynolds 2017 Iowa State University

Astrovirus Infection In Hatchling Turkeys: Alterations In Intestinal Maltase Activity, Mari L. Thouvenelle, Joseph S. Haynes, Jerry L. Sell, Don L. Reynolds

Joseph Haynes

Two experiments were conducted to determine intestinal disaccharidase ac- tivity in 1-day-old commercial turkey poults inoculated with astrovirus. Small intestinal sam- ples were collected on days 0.5, 1, 3, and 7 postinoculation (PI) in Expt. 1 and on days 7, 10, and 14 PI in Expt. 2 and evaluated for specific maltase activity (SMA). Astrovirus infection was verified on day 7 PI by immune electron microscopy of intestinal contents. Inoculated poults developed diarrhea and a transient, significant decrease in intestinal SMA. SMA was significantly (P < 0.05) lower in astrovirus-inoculated poults than in control poults throughout the entire small ...


Astrovirus Infection In Hatchling Turkeys: Histologic, Morphometric, And Ultrastructural Findings, Mari L. Thouvenelle, Joseph S. Haynes, Don L. Reynolds 2017 Iowa State University

Astrovirus Infection In Hatchling Turkeys: Histologic, Morphometric, And Ultrastructural Findings, Mari L. Thouvenelle, Joseph S. Haynes, Don L. Reynolds

Joseph Haynes

In three separate experiments, 2- or 5-day-old commercial turkey poults were inoculated orally with astrovirus and examined for clinical signs and for gross and microscopic lesions over a period of 14 days. By day 2 postinoculation (PI), inoculated poults had de- veloped diarrhea, generalized loss of intestinal tone, and dilated ceca that contained light- yellow fluid feces and gas; these changes persisted through day 10 PI. Mild crypt hyperplasia was the only change discernible by light microscopy, and it was first noted in the proximal jejunum on day 1 PI, in the distal jejunum and ileum on day 3 PI ...


The North American Quails, Partridges, And Pheasants, Paul A. Johnsgard 2017 University of Nebraska-Lincoln

The North American Quails, Partridges, And Pheasants, Paul A. Johnsgard

Zea E-Books

This book documents the biology of six species of New World quails that are native to North America north of Mexico (mountain, scaled, Gambel’s, California, and Montezuma quails, and the northern bobwhite), three introduced Old World partridges (chukar, Himalayan snowcock, and gray partridge), and the introduced common (ring-necked) pheasant. Collectively, quails, partridges, and pheasants range throughout all of the continental United States and the Canadian provinces. Two of the species, the northern bobwhite and ring-necked pheasant, are the most economically important of all North American upland game birds. All of the species are hunted extensively for sport and are ...


Effect Of Macrolide Usage On Emergence Of Erythromycin-Resistant Campylobacter Isolates In Chickens, Jun Lin, Meiguan Yan, Orhan Sahin, Sonia Pereira, Yun-Juan Chang, Qijing Zhang, Qijing Zhang 2017 University of Tennessee, Knoxville

Effect Of Macrolide Usage On Emergence Of Erythromycin-Resistant Campylobacter Isolates In Chickens, Jun Lin, Meiguan Yan, Orhan Sahin, Sonia Pereira, Yun-Juan Chang, Qijing Zhang, Qijing Zhang

Qijing Zhang

In this work we conducted both in vitro and in vivo experiments to examine the development and mechanisms of erythromycin (Ery) resistance in Campylobacter jejuni and Campylobacter coli. In vitro plating revealed that both Campylobacter species had similar but low spontaneous mutation frequencies (3 × 10−9 to −10) for Ery resistance. Chickens infected with C. jejuni or C. coli were subjected to single or multiple treatments with medicated water containing tylosin (0.53 g/liter), which transiently reduced the level of Campylobacter colonization but did not select for Ery-resistant (Eryr) mutants in the treated birds. However, when tylosin was given ...


Digital Commons powered by bepress