Advanced search
Start date

Efficiency and incorporation of nitrogenous compounds from L- (15N) methionine on the growth of broiler chickens

Grant number: 15/25717-0
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): April 01, 2016
Effective date (End): February 28, 2018
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
Principal Investigator:Nilva Kazue Sakomura
Grantee:Letícia Graziele Pacheco
Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil
Associated research grant:13/25761-4 - Modeling production and nutritional requirements of poultry and fish, AP.TEM


The metabolic cost to incorporate any aminoacid in a protein chain is less than that estimated for excrete it, by exceeding the required amount of aminoacid, energy that could be used for deposition in tissues is diverted to nitrogen excretion. Based on this principle, new alternatives are sought to elucidate questions about metabolism and physiology to animal production. The technique of stable isotopes will be used in this study to determine the deposition efficiency of L- (15N) methionine in different tissues in three ages of broiler. It will be used 183 Cobb 500® male broiler chickens of three tests in: 4 to 16, 18 to 30 and 32 to 44 days of age. The nutritional program will consist of three stages and the feed is supplemented with L- (15N) methionine (150,21mg, 15N 98 atm%, Cambridge Isotope Laboratories®), it will be administered according to the body weight of the broiler at the beginning of each test. The collected samples are: feathers, intestines, liver, pectoral muscle, excreta and blood plasma. Subsequently, the samples will be analyzed by an elemental analyzer (CHNS-O) coupled to aisotope-ratio mass spectrometry (IRMS) to quantify the isotopic enrichment of tissues. The efficiency of utilization to L- (15N) methionine will be calculated based on the mass balance between consumption, excretion and tissue incorporation of nitrogen. Additionally, this study will foster more specific understanding of the nitrogen present in methionine incorporation in broiler metabolism and physiological these results will contribute to traditional methods of quantifying the nutritional requirements of broilers. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
Articles published in other media outlets (0 total):
More itemsLess items

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PACHECO, LETICIA G.; SAKOMURA, NILVA K.; SUZUKI, RAFAEL M.; DORIGAM, JULIANO C. P.; VIANA, GABRIEL S.; LEME, BRUNO B.. Efficiency of methionine and cystine utilization by broiler chickens using stable isotopes. JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION, v. 104, n. 1, . (15/25717-0, 13/25761-4)
PACHECO, LETICIA G.; SAKOMURA, NILVA K.; SUZUKI, RAFAEL M.; DORIGAM, JULIANO C. P.; VIANA, GABRIEL S.; VAN MILGEN, JAAP; DENADAI, JULIANA C.. Methionine to cystine ratio in the total sulfur amino acid requirements and sulfur amino acid metabolism using labelled amino acid approach for broilers. BMC Veterinary Research, v. 14, . (15/25717-0, 13/25761-4)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PACHECO, Letícia Graziele. Efficiency and incorporation of methionine and cystine in broilers in dose response and marked stable isotope assays. 2018. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal Jaboticabal.

Please report errors in scientific publications list using this form.