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dc.contributor.authorFelix, Adrienne Marie
dc.creatorFelix, Adrienne Marieen_US
dc.date.accessioned2011-10-20T19:03:27Z
dc.date.available2011-10-20T19:03:27Z
dc.date.issued2010-05
dc.identifier.citationFelix, Adrienne Marie. (2010). Circulating Ghrelin Concentrations During the Transition Period of Dairy Cattle and the Associated Relationship with Milk Production (Bachelor's thesis, University of Arizona, Tucson, USA).
dc.identifier.urihttp://hdl.handle.net/10150/146246
dc.description.abstractThe hormone ghrelin was discovered in 1999. It has a 27-28 amino acid sequence with a noctanoylation at the third serine residue. Ghrelin is expressed in most tissues throughout the body and is primarily known for its GH releasing activities. Ghrelin also has a significant role in the regulation of feed intake and energy balance and may be a potent metabolic regulator of reproduction. During this experiment, plasma ghrelin concentrations were measured in dairy cattle (n=13) biweekly from 14 days prepartum to 60 days postpartum. Circulating ghrelin concentrations did not change with stage of lactation, but were affected by level of milk production. High producing and low producing cows had expected 305-day yields of 12,923 +/- 217 and 10,332 +/- 322 kilograms of milk, respectively (P< 0.001). The high producers had lower circulating ghrelin concentrations (45.1 +/- 8.9 pg/mL) than low producers (73.3 +/- 8.5 pg/mL). These results are different than anticipated but may, be explained by prioritized nutrient partitioning in low producing and high producing dairy cows.
dc.language.isoenen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleCirculating Ghrelin Concentrations During the Transition Period of Dairy Cattle and the Associated Relationship with Milk Productionen_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelbachelorsen_US
thesis.degree.disciplineHonors Collegeen_US
thesis.degree.disciplineVeterinary Scienceen_US
thesis.degree.nameB.S.en_US
refterms.dateFOA2018-08-20T09:08:35Z
html.description.abstractThe hormone ghrelin was discovered in 1999. It has a 27-28 amino acid sequence with a noctanoylation at the third serine residue. Ghrelin is expressed in most tissues throughout the body and is primarily known for its GH releasing activities. Ghrelin also has a significant role in the regulation of feed intake and energy balance and may be a potent metabolic regulator of reproduction. During this experiment, plasma ghrelin concentrations were measured in dairy cattle (n=13) biweekly from 14 days prepartum to 60 days postpartum. Circulating ghrelin concentrations did not change with stage of lactation, but were affected by level of milk production. High producing and low producing cows had expected 305-day yields of 12,923 +/- 217 and 10,332 +/- 322 kilograms of milk, respectively (P< 0.001). The high producers had lower circulating ghrelin concentrations (45.1 +/- 8.9 pg/mL) than low producers (73.3 +/- 8.5 pg/mL). These results are different than anticipated but may, be explained by prioritized nutrient partitioning in low producing and high producing dairy cows.


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