Avaliação de sistema de climatização em Poedeiras comerciais

• Autor(a) principal: Kodaira, Vanessa [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/126407; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/13-08-2015/000843905.pdf
• topic: Animais - Proteção; Energia eletrica - Consumo; Termografia; Análise econômico-financeira; Zootecnia; Animal welfare

The animal welfare is one of the most discussed topics in the animal production chain and, with respect to poultry, many critics are aimed at the practices involved in the production of commercial eggs. Most of the large poultry companies producing eggs are opting for complete automation of their aviaries, but few of them offer the birds a suitable environment so that they can express their maximum productivity. The aim of this study was to compare the feasibility of an automated and acclimated and a non-acclimated aviary for laying hens in a poultry farm located in Bastos, SP. Dry bulb temperature, relative humidity and black globe temperature were recorded every 30 minutes, for one year, to determine the index of thermal comfort. Mortality of the birds, egg production and feed consumption were recorded daily. The variable of egg quality were recorded, analyzing 90 eggs from each shed, every 28 days. The calculations of feed costs, depreciation of equipment, labor and consumption of electrical power were used for the analysis of the profitability of the two sheds in study. At the same time, the surface temperature of the crests and feathered areas of the birds in various points of both sheds were analyzed, through infrared images, and hematological and biochemical parameters were analyzed and subsequently correlated with the index of thermal comfort, with the purpose of monitoring the heat stress of the birds, collecting blood from 15 laying hens of both sheds every 28 days. The results show that the acclimated system was effective, providing a reduction in the temperature and a thermal environment more suitable for creation of hens with higher hen-housed eggs and greater egg weight during the entire period of research and better egg shell quality in the summer period. When there are no failures in the supply of electrical energy, the acclimated system has better economic feasibility, providing ...