Nutritional management systems for broilers finding productivity and bone quality

• Grant number: 15/19225-8
• Support Opportunities: Regular Research Grants
• Start date: December 01, 2015
• End date: November 30, 2017
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Principal Investigator: Ibiara Correia de Lima Almeida Paz
• Grantee: Ibiara Correia de Lima Almeida Paz
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
• Associated researchers: Edivaldo Antônio Garcia

Abstract

The objective of this study is to evaluate which nutritional management system (regular, medium or higher performance) promotes improvements in the productive, economic and bone characteristics of broiler chickens in two seasons, hot and cold. Two experiments will be conducted, 2,400 broilers are used in each, two commercial strains gained one day old and distributed between treatments. The experiment will be randomized blocks allocated in a 2x3 factorial (Cobb® 500 and Ross® 308 lines and requirements for regular, medium or higher performance). The broilers will be assessed for performance and economic analysis will be based on this data. The incidence of metabolic diseases (sudden death syndrome and ascites) will be registered and the birds do not develop properly will be discarded. Such broilers are necropsied and evaluated also on the femoral degeneration (FD), tibial dyschondroplasia (TD), spondylolisthesis (SPO) and appearance and weight of the heart, liver and lung. The gait score (GS) will be assessed at 34 and 41 days of reared. At 36 and 43 days to create 144 birds (three birds/repeat/treatment) will be slaughtered and carcass weight and parts weight measured to yield calculation. Carcass are classified according to the presence or absence of scratches as well as the number of observed scratches. Also will be evaluated locomotion problems (FD, TD and SPO), Seedor index (SI), bone resistance (BR) and black bone syndrome (BBS). The evaluated correlations will be between the productive characteristics (body weight, weight gain and carcass weight) and other traits evaluated. The data will be statistically analyzed using the SAS 9.2 program. (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)

DE LIMA ALMEIDA PAZ, IBIARA CORREIA; DE LIMA ALMEIDA, IANE CORREIA; MILBRADT, ELISANE LENITA; CALDARA, FABIANA RIBEIRO; PANHOZA TSE, MARCOS LIVIO. Effects of analgesic and noise stimulus in gait score assessment. PLoS One, v. 14, n. 1, JAN 3 2019. (15/19225-8)