Results 31 to 40 of about 586,128 (253)

Dietary fat supplements influence weight gain and egg production, but not offspring sex ratios in Japanese quail, Coturnix coturnix japonica

Journal of Avian Biology, 2023
Sex ratio theory suggests that females should bias offspring sex ratios based on maternal condition and the availability of critical food resources. Work in birds indicates that females do, indeed, bias sex ratios according to maternal condition and food
James Curry, Woo Yun Kim, Mary T. Mendonça, Kristen J. Navara   +3 more
doaj   +1 more source

Bacterial composition of a competitive exclusion product and its correlation with product efficacy at reducing Salmonella in poultry

Frontiers in Physiology, 2023
The mature intestinal microbiome is a formidable barrier to pathogen colonization. Day-old chicks seeded with cecal contents of adult hens are resistant to colonization with Salmonella, the basis of competitive exclusion.
Margie D. Lee, Margie D. Lee, Adriana A. Pedroso, John J. Maurer, John J. Maurer   +4 more
doaj   +1 more source

Using step width to compare locomotor biomechanics between extinct, non-avian theropod dinosaurs and modern obligate bipeds [PDF]

, 2017
How extinct, non-avian theropod dinosaurs locomoted is a subject of considerable interest, as is the manner in which it evolved on the line leading to birds. Fossil footprints provide the most direct evidence for answering these questions. In this study,
Barrett, R S, Bishop, P J, Clemente, C J, Graham, D F, Hocknull, S A, Hutchinson, J R, Lamas, L P, Lloyd, D G, Rubenson, J, Weems, R E, Wilson, R S   +10 more
core   +1 more source

Study of the underlying mechanisms and consequences of pathogenicity differences between two in vitro selected G1-H9N2 clones originating from a single isolate

Veterinary Research, 2019
The G1-H9N2 avian influenza virus (AIV) has caused significant economic losses in the commercial poultry industry due to reduced egg production and increased mortality.
Giang Thu Nguyen, Fabienne Rauw, Mieke Steensels, Fiona Ingrao, Francesco Bonfante, Irit Davidson, Bénédicte Lambrecht   +6 more
doaj   +1 more source

Effects of Dark Brooder Rearing and Age on Hypothalamic Vasotocin and Feather Corticosterone Levels in Laying Hens

Frontiers in Veterinary Science, 2020
Chickens cannot independently thermoregulate at hatch and lack opportunity to behaviorally thermoregulate with a hen in the egg layer industry, thus barns are heated to thermoneutral temperatures.
Rebecca E. Nordquist, Rebecca E. Nordquist, Elisabeth C. Zeinstra, Alyssa Dougherty, Anja B. Riber   +4 more
doaj   +1 more source

Telomere length declines with age, but relates to immune function independent of age in a wild passerine

Royal Society Open Science, 2022
Telomere length (TL) shortens with age but telomere dynamics can relate to fitness components independent of age. Immune function often relates to such fitness components and can also interact with telomeres.
Michael J. Roast, Justin R. Eastwood, Nataly Hidalgo Aranzamendi, Marie Fan, Niki Teunissen, Simon Verhulst, Anne Peters   +6 more
doaj   +1 more source

Fossilized skin reveals coevolution with feathers and metabolism in feathered dinosaurs and early birds [PDF]

, 2018
Feathers are remarkable evolutionary innovations that are associated with complex adaptations of the skin in modern birds. Fossilised feathers in non-avian dinosaurs and basal birds provide insights into feather evolution, but how associated ...
Benton, Michael J., Foley, Tara, Hone, David W. E., Johnson, Diane, Kearns, Stuart L., McNamara, Maria E., Orr, Patrick J., Rogers, Chris S., Toulouse, André, Xu, Xing, Zhang, Fucheng, Zhou, Zhonghe   +11 more
core   +5 more sources

Avian Liver: The Forgotten Organ

Animals, 2019
Simple Summary The liver is a multi-purpose organ, with involvement in bile secretion, and lipid, carbohydrate and protein metabolism, as well as a number of other metabolic functions.
F. Zaefarian, M. Abdollahi, A. Cowieson, V. Ravindran   +3 more
semanticscholar   +1 more source

Evolution, global spread, and pathogenicity of highly pathogenic avian influenza H5Nx clade 2.3.4.4

Journal of Veterinary Sciences, 2017
Novel subtypes of Asian-origin (Goose/Guangdong lineage) H5 highly pathogenic avian influenza (HPAI) viruses belonging to clade 2.3.4, such as H5N2, H5N5, H5N6, and H5N8, have been identified in China since 2008 and have since evolved into four ...
Dong‐Hun Lee, K. Bertran, J. Kwon, D. Swayne   +3 more
semanticscholar   +1 more source

Production of monoclonal antibodies against recombinant nucleoprotein of avian influenza virus, serotype H9N2 [PDF]

Iranian Journal of Veterinary Medicine, 2018
Background: Avian influenza viruses (AIVs) including the subtype H9N2 cause considerable financial losses to poultry industries. Rapid and accurate diagnosis of avian influenza (AI) infection is important in control and eradication programs.
Masoudreza Seyfiabad Shapouri, Azadeh Yektaseresht, Masoud Ghorbanpoor Najafabadi, Amin Jaydari   +3 more
doaj   +1 more source