Search Results - "Karcher, D. M."

Chronic treatment with glucocorticoids does not affect egg quality but increases cortisol deposition into egg albumen and elicits changes to the heterophil to lymphocyte ratio in a sex-dependent manner by Oluwagbenga, E M, Tetel, V, Tonissen, S, Karcher, D M, Fraley, G S

“…During chronic stress, there is an initial increase in glucocorticoid (GC) levels, but they then return to low, albeit not baseline, levels. Recent studies…”
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Laying hens in aviaries with different litter substrates: Behavior across the flock cycle and feather lipid content by Campbell, D L M, Ali, A B A, Karcher, D M, Siegford, J M

“…The tiered aviary for laying hens includes a floor litter area to promote foraging and dust bathing. Data are needed on hens' use of different litter…”
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Analytical bone calcium and bone ash from mature laying hens correlates to bone mineral content calculated from quantitative computed tomography scans by Robison, C I, Karcher, D M

“…Laying hen skeletal health continues to be an industry priority. Bone ash and bone Ca quantification in laying hen long bones provides valuable information on…”
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Impact of egg handling and conditions during extended storage on egg quality by Jones, D R, Ward, G E, Regmi, P, Karcher, D M

“…Abstract The international trade of shell eggs has become more important in recent years in order to feed a growing worldwide population, meet food…”
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Differences in performance, body conformation, and welfare of conventional and slow-growing broiler chickens raised at 2 stocking densities by Weimer, S.L., Mauromoustakos, A., Karcher, D.M., Erasmus, M.A.

“…Consumer concern for broiler welfare has increased interest in chicken from slower growing (SG) broiler strains. Broilers from SG strains take longer to reach…”
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Hen welfare in different housing systems by Lay, D.C. Jr, Fulton, R.M, Hester, P.Y, Karcher, D.M, Kjaer, J.B, Mench, J.A, Mullens, B.A, Newberry, R.C, Nicol, C.J, O'Sullivan, N.P, Porter, R.E

“…Egg production systems have become subject to heightened levels of scrutiny. Multiple factors such as disease, skeletal and foot health, pest and parasite…”
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Laying hen production and welfare in enriched colony cages at different stocking densities by Weimer, S L, Robison, C I, Tempelman, R J, Jones, D R, Karcher, D M

“…Many laying hen companies in the United States are pledging to move away from intensive conventional cages to extensive housing systems. Enriched colony cages…”
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Differences in carcass composition and meat quality of conventional and slow-growing broiler chickens raised at 2 stocking densities by Weimer, S.L., Zuelly, S., Davis, M., Karcher, D.M., Erasmus, M.A.

“…The fast growth rate of broiler chickens is a welfare concern that has increased consumer interest in chicken from slower growing (SG) broilers. Replacing…”
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Effect of a commercial housing system on egg quality during extended storage by Jones, D R, Karcher, D M, Abdo, Z

“…Egg producers in the United States are utilizing a variety of commercial egg production systems to provide consumer choice and meet legislative requirements…”
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Comparisons of bone properties and keel deformities between strains and housing systems in end-of-lay hens by Regmi, P., Nelson, N., Steibel, J. P., Anderson, K. E., Karcher, D. M.

“…Susceptibility of caged layers to osteoporosis and cage layer fatigue has generated interest in newer housing systems that favor increased load-bearing…”
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Housing conditions alter properties of the tibia and humerus during the laying phase in Lohmann white Leghorn hens by Regmi, P, Smith, N, Nelson, N, Haut, R C, Orth, M W, Karcher, D M

“…Osteoporosis in caged hens is one driving factor for the United States egg industry to explore options regarding alternative housing systems for laying hens…”
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Effect of rearing environment on bone growth of pullets by Regmi, P, Deland, T S, Steibel, J P, Robison, C I, Haut, R C, Orth, M W, Karcher, D M

“…Alternative housing systems for laying hens provide mechanical loading and help reduce bone loss. Moreover, achieving greater peak bone mass during pullet…”
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Environmental sampling methods’ influence on detection of pathogens in cage-free aviary housing by Garcia, J.S., Jones, D.R., Gast, R.K., Karcher, D.M., Erasmus, M.A.

“…The environmental sampling of layer housing systems is essential to identifying potential pathogens that are of concern to human health. To identify the…”
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Comparative evaluation of three egg production systems: Housing characteristics and management practices by Zhao, Y., Shepherd, T. A., Swanson, J. C., Mench, J. A., Karcher, D. M., Xin, H.

“…This paper is an integral part of the special publication series that arose from the multidisciplinary and multi-institutional project of the Coalition for…”
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Influence of genetic strain and access to litter on spatial distribution of 4 strains of laying hens in an aviary system by Ali, A B A, Campbell, D L M, Karcher, D M, Siegford, J M

“…Many laying hen producers are transitioning from conventional cages to new housing systems including multi-tier aviaries. Aviary resources, such as litter…”
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Research Note: Orange corn altered the cecal microbiome in laying hens by Chang, T., Ngo, J., Vargas, J.I., Rocheford, E., Rocheford, T., Ortiz, D., Karcher, D.M., Johnson, T.A.

“…Carotenoids, which are pigments known to have many health benefits, such as their antioxidant properties, are being researched for their potential as a feed…”
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Impact of commercial housing systems and nutrient and energy intake on laying hen performance and egg quality parameters by Karcher, D M, Jones, D R, Abdo, Z, Zhao, Y, Shepherd, T A, Xin, H

“…The US egg industry is exploring alternative housing systems for laying hens. However, limited published research related to cage-free aviary systems and…”
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Calcium and phosphorus loss from laying hen bones autoclaved for tissue removal by Cloft, S E, Robison, C I, Karcher, D M

“…ABSTRACT Standard procedure for most conventional bone assays rely on bones being free of attached muscle or integumentary tissue. Use of an autoclave for bone…”
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Microbiological impact of three commercial laying hen housing systems by Jones, D R, Cox, N A, Guard, J, Fedorka-Cray, P J, Buhr, R J, Gast, R K, Abdo, Z, Rigsby, L L, Plumblee, J R, Karcher, D M, Robison, C I, Blatchford, R A, Makagon, M M

“…Hen housing for commercial egg production continues to be a societal and regulatory concern. Controlled studies have examined various aspects of egg safety,…”
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Orange corn diets associated with lower severity of footpad dermatitis in broilers by Abraham, M.E., Weimer, S.L., Scoles, K., Vargas, J.I., Johnson, T.A., Robison, C., Hoverman, L., Rocheford, E., Rocheford, T., Ortiz, D., Karcher, D.M.

“…Footpad dermatitis (FPD), damage and inflammation of the plantar surface of the foot, is of concern for poultry because FPD affects the birds' welfare and…”
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