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Animal Sciences Commons™

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Poultry or Avian Science

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2015

Articles 1 - 3 of 3

Full-Text Articles in Animal Sciences

Homoplastic Microinversions And The Avian Tree Of Life, Edward Braun, Rebecca Kimball, Kin-Lan Han, Naomi Iuhasz-Velez, Amber Bonilla, Jena Chojnowski, Jordan Smith, Rauri Bowie, Michael Braun, Shannon Hackett, John Harshman, Christopher Huddleston, Ben Marks, Kathleen Miglia, William Moore, Sushma Reddy, Frederick Sheldon, Christopher Witt, Tamaki Yuri Dec 2015

Homoplastic Microinversions And The Avian Tree Of Life, Edward Braun, Rebecca Kimball, Kin-Lan Han, Naomi Iuhasz-Velez, Amber Bonilla, Jena Chojnowski, Jordan Smith, Rauri Bowie, Michael Braun, Shannon Hackett, John Harshman, Christopher Huddleston, Ben Marks, Kathleen Miglia, William Moore, Sushma Reddy, Frederick Sheldon, Christopher Witt, Tamaki Yuri

Sushma Reddy

Abstract Background Microinversions are cytologically undetectable inversions of DNA sequences that accumulate slowly in genomes. Like many other rare genomic changes (RGCs), microinversions are thought to be virtually homoplasy-free evolutionary characters, suggesting that they may be very useful for difficult phylogenetic problems such as the avian tree of life. However, few detailed surveys of these genomic rearrangements have been conducted, making it difficult to assess this hypothesis or understand the impact of microinversions upon genome evolution. Results We surveyed non-coding sequence data from a recent avian phylogenetic study and found substantially more microinversions than expected based upon prior information about …

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Prevalence And Effects Of Mycotoxins On Poultry Health And Performance, And Recent Development In Mycotoxin Counteracting Strategies, G. R. Murugesan, D Ledoux, K Naehrer, F Berthiller, T Applegate, B Grenier, T Phillips, G Schatzmayr Dec 2014

Prevalence And Effects Of Mycotoxins On Poultry Health And Performance, And Recent Development In Mycotoxin Counteracting Strategies, G. R. Murugesan, D Ledoux, K Naehrer, F Berthiller, T Applegate, B Grenier, T Phillips, G Schatzmayr

G. R. Murugesan

Extensive research over the last couple of decades has made it obvious that mycotoxins are commonly prevalent in majority of feed ingredients. A worldwide mycotoxin survey in 2013 revealed 81 % of around 3,000 grain and feed samples analyzed had at least one mycotoxin which was higher than the ten-year average (from 2004 to 2013) of 76% in a total of 25,944 samples. The considerable increase in the number of positive samples in 2013 may be due to the improvements in detection methods and their sensitivity. The recently developed liquid chromatography coupled to (tandem) mass spectrometry allows the inclusion of …

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Corrosion Casts: A Novel Application Of A Polyurethane Resin (Pu4ii) For Visualizing Eggshell Pore Morphology, Given Harper, Jason P. Murphy, Mark T. Swanson, William B. Jaeckle Dec 2014

Corrosion Casts: A Novel Application Of A Polyurethane Resin (Pu4ii) For Visualizing Eggshell Pore Morphology, Given Harper, Jason P. Murphy, Mark T. Swanson, William B. Jaeckle

Given Harper

Avian eggshells serve the dual purposes of protecting the developing embryo from the external environment while also facilitating the loss of water vapor and the required exchange of CO2 and O2 gases. Pores that span the eggshell enable the loss of water and trans-shell gas exchange. Although knowledge of the geometry of these spaces is necessary to generate accurate estimates of the rate of gas diffusion across the shell, few techniques exist to obtain these data. Estimates of gas conductance across eggshells are typically calculated from eggshell thickness and the size and number of the pores on the exterior eggshell …

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