Banca de DEFESA: DANIEL FERNANDO RODIGHERI

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DANIEL FERNANDO RODIGHERI
DATE: 06/08/2020
TIME: 08:30
LOCAL: Web Conferência via Google Meet - meet.google.com/juj-whwh-gvr.
TITLE:

Risk factors associated with locomotor problems in broilers.

KEY WORDS:

Poultry farming; Locomotion; Mortality; Ambience; Animal welfare.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

Broiler mortality is a valuable indicator that must be managed in detail. Among the factors of mortality of birds, the object of the present study was the elimination by locomotor problems that affects the majority of poultry populations. In order to find out which zootechnical and environmental factors had the more important impact on the number of birds eliminated by locomotor problems during the life of 139 flocks (3,445,583 birds) raised in an intensive production system under field conditions. The data were previously examined and subsequently submitted to a logistic regression analysis using the NLMIXED procedure of the “Statistical Analysis System ©” (SAS, 2012), to determinate the significance of each factor in relation to the mortality due to locomotor problems. The length of the break, the feed intake in the pre-initial phase, the weight ratio between 14 and 7 days of age and the age of slaughtering, are quantitative variables that presented a level of significance over 95% being considered influential causes for locomotor problems. The classification of producers in the zootechnical result and the presence of environmental enrichment were categorical variables that presented as causes of elimination due to locomotion problems with a significance level above 95%. We conclude that it is possible to associate locomotor problems in broilers with the consumption of the pre-initial diet and its impact on the intermediate weights at the age of 7 and 14 days as well as management factors of birds that may generate skeletal overload.

BANKING MEMBERS:
Externo à Instituição - ARLEI COLDEBELLA
Interno - 1756086 - DIOGENES DEZEN
Presidente - 558.691.730-00 - PAULO AUGUSTO ESTEVES - EMBRAPA