Search Results - "Sheahan, A.J."

Genetic strain and diet effects on grazing behavior, pasture intake, and milk production by Sheahan, A J, Kolver, E S, Roche, J R

“…Understanding how dairy cows adjust their grazing behavior in response to feed supplements is important for the development of management strategies that…”
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Timing of supplementation alters grazing behavior and milk production response in dairy cows by Sheahan, A J, Gibbs, S J, Roche, J R

“…Offering feed supplements to grazing dairy cows results in substitution of pasture; however, previous data indicate that the time at which concentrate…”
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Diurnal patterns of grazing behavior and humoral factors in supplemented dairy cows by Sheahan, A J, Boston, R C, Roche, J R

“…Offering feed supplements to grazing dairy cows results in a reduction in grazing time. However, the effect differs depending on the time of day that feeds are…”
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The effect of starch-, fiber-, or sugar-based supplements on nitrogen utilization in grazing dairy cows by Higgs, R J, Sheahan, A J, Mandok, K, Van Amburgh, M E, Roche, J R

“…Nitrogen utilization in grazing cows is often low due to high concentrations of rapidly soluble and degradable protein in the pasture-based diet. Broadly,…”
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Short communication: immediate and deferred milk production responses to concentrate supplements in cows grazing fresh pasture by Roche, J R, Kay, J K, Rius, A G, Grala, T M, Sheahan, A J, White, H M, Phyn, C V C

“…The objective of this study was to determine the increase in milk production from supplementation that occurred after supplementation ceased. This portion of…”
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Carbohydrate supplements and their effects on pasture dry matter intake, feeding behavior, and blood factors associated with intake regulation by Sheahan, A J, Kay, J K, Roche, J R

“…Supplementary feeds are offered to grazing dairy cows to increase dry matter (DM) and metabolizable energy (ME) intakes; however, offering feed supplements…”
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Somatotropic axis and concentrate supplementation in grazing dairy cows of genetically diverse origin by Grala, T M, Lucy, M C, Phyn, C V C, Sheahan, A J, Lee, J M, Roche, J R

“…Supplementing pasture-fed dairy cows with concentrates in early lactation was hypothesized to result in an earlier postpartum recoupling of the somatotropic…”
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Supplementation of urea to a basal pasture diet fed to dairy cows to model N-partitioning relationships by Hendriks, S.J., Lopez-Villalobos, N., Sheahan, A.J., Donaghy, D.J., Roche, J.R.

“…[Display omitted] •Urinary nitrogen from grazing cows is a major source of nitrogen losses to waterways•Nitrogen balance studies can be used to evaluate…”
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Insulin resistance in divergent strains of Holstein-Friesian dairy cows offered fresh pasture and increasing amounts of concentrate in early lactation by Chagas, L M, Lucy, M C, Back, P J, Blache, D, Lee, J M, Gore, P J S, Sheahan, A J, Roche, J R

“…The objective of this study was to determine whether the physiological response to an intravenous glucose challenge would be affected by genetic strain or…”
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Short communication: change in plasma ghrelin in dairy cows following an intravenous glucose challenge by Roche, J R, Sheahan, A J, Chagas, L M, Boston, R C

“…Ghrelin is an endogenous ligand of the growth hormone secretagogue receptor and a potent orexigenic (appetite-stimulating) agent in humans and rodents, but…”
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Long-term infusions of ghrelin and obestatin in early lactation dairy cows by Roche, J R, Sheahan, A J, Chagas, L M, Blache, D, Berry, D P, Kay, J K

“…Ghrelin is an endogenous ligand of the growth hormone secretagogue receptor and a potential orexigenic agent in monogastrics and ruminants. Obestatin has been…”
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Expression analysis of key somatotropic axis and liporegulatory genes in ghrelin- and obestatin-infused dairy cows by Grala, T.M., Kay, J.K., Walker, C.G., Sheahan, A.J., Littlejohn, M.D., Lucy, M.C., Roche, J.R.

“…Ghrelin, an orexigenic hormone, is the endogenous ligand for the growth hormone secretagogue receptor (GHSR). Obestatin is produced from the same precursor…”
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A sensory additive alters grazing behavior and increases milk response to concentrate supplementation in dairy cows by Nannig, P., Pulido, R.G., Ruiz-Albarrán, M., Bargo, F., Tedó, G., Palladino, R.A., Cussen, R., Acuña, J., Sheahan, A.J., Roche, J.R., Ipharraguerre, I.R.

“…•Supplementing a sensory additive increased milk production and energy corrected milk yield.•Animals supplemented with a sensory additive showed higher grazing…”
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Associations among dairy cow body condition and welfare-associated behavioral traits by Matthews, L R, Cameron, C, Sheahan, A J, Kolver, E S, Roche, J R

“…Some evidence exists that cow body condition score (BCS) is associated with risks to animal health, and that higher BCS in extensively kept animals provides a…”
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Concentrate supplementation reduces postprandial plasma ghrelin in grazing dairy cows: a possible neuroendocrine basis for reduced pasture intake in supplemented cows by Roche, J R, Sheahan, A J, Chagas, L M, Berry, D P

“…Ghrelin is an endogenous ligand of the growth hormone secretagogue receptor, and a potent orexigenic agent in human and rodent studies. We hypothesized that…”
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Short communication: genetic selection for milk production increases plasma ghrelin in dairy cows by Roche, J R, Sheahan, A J, Chagas, L M, Berry, D P

“…Ghrelin is an endogenous ligand of the growth hormone secretagogue receptor and a potent orexigenic agent in human and rodent studies, but there is limited…”
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