Determination of net energy requirements for maintenance in broiler breeders

• Grant number: 19/26028-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2020
• End date: September 30, 2020
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
• Principal Investigator: Nilva Kazue Sakomura
• Grantee: Guilherme Ferreira da Silva Teofilo
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

The aim of the study is to determine the net energy requirement of maintenance in broiler breeders under different feeding regimes. A total of 18 Hubbard breeders with 30 to 40 weeks of age will be subjected to two feeding regimes: Restricted feeding (150 g feed/bird/day); and ad libitum feeding. Measurements will be made at three ages (30, 35 and 40 weeks of age) in groups of six birds each. For the measurement of heat production the birds will be housed in respirometric chambers (1 bird/chamber) under thermoneutral conditions to determine the heat increment production, and then fasted for 24 hours to measure the fasting heat production (FHP). For this, measurements of oxygen consumption (VO2) and carbon dioxide production (VCO2) will be performed by the indirect calorimetry method, and the heat production (PC) calculated by the Bronwer equation (1964). At the end of each period, the body composition of the birds will be analyzed by the DXA scanner to obtain the protein, lipid and mineral content. Statistical analysis will be two-way ANOVA (2x3) performed to test the effect of dietary restriction on FHP. From the FHP measurement will be adjusted the basal metabolic rate function (5N 5C5I0.75) a is the coefficient and PV is the live weight. The analysis of body components evaluation (protein, lipids and mineral matter) will be performed by multiple linear regression analysis and correlated with FHP. (AU)

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)

DA SILVA TEOFILO, GUILHERME FERREIRA; LIZANA, RONY RIVEROS; CAMARGOS, ROSIANE DE SOUZA; LEME, BRUNO BALBINO; HORNA MORILLO, FREDDY ALEXANDER; SILVA, RAULLY LUCAS; KOCHENBORGER FERNANDES, JOAO BATISTA; SAKOMURA, NILVA KAZUE. Effect of feed restriction on the maintenance energy requirement of broiler breeders. ANIMAL BIOSCIENCE, v. 35, n. 5, p. 8-pg., 2022-05-01. (19/26575-6, 19/26028-5)