Termografia infravermelho na estimativa de conforto térmico de frangos de corte

Rev. Bras. Cienc. Avic.

et al. 2016

The most common lesions observed in commercial broiler farms are hock burns and pododermatitis, defined as necrotic lesions on the plantar surface of the footpads and in the hock of growing broilers, causing pain and compromising broiler welfare. The present study aimed at identifying the risks of hock burns and pododermatitis in broilers reared under commercial conditions on new or reused litter. Twenty-four 40-d-old broilers reared in two houses in a commercial broiler farm. The plantar surface of the footpads and the hocks of broiler were recorded using infrared thermal images. The incidence of hock burns in broilers reared on new litter was 0.72 times lower than those on reused litter. Broilers reared on new litter presented lower risk (0.75, RR<1) of presenting pododermatitis when compared to those reared on reused litter. When simulating the risk using a larger sample, the simulated risk of broilers presenting footpad and hock lesions when reared on new litter was 38% higher those reared on reused litter.

supporting

confidence: 86%

Risk of Incidence of Hock Burn and Pododermatitis in Broilers Reared under Commercial Conditions

Jacob

Baracho

Rev. Bras. Cienc. Avic.

et al. 2016

“…The facilities must ensure an environment of thermal comfort that allows the animal to express its full genetic potential (NASCIMENTO et al, 2014). Animal facilities are the result of all the external and internal conditions that affect the development, responses, and growth of the animals housed in them.…”

Section: Systems For Broiler Productionmentioning

confidence: 99%

Factors That Affect Broiler Production

Baracho

Revista Brasileira De Engenharia De Biossistemas

Moura

et al. 2017

Brazil occupies a privileged position worldwide in poultry farming. The economic activity is recognized as necessary for the country's GDP and also has a significant climatic diversity. Because of this, different types of aviaries were and still are built in the national territory. The objective of this study was to present a systematic review of the factors that have an impact on the intensive production of broiler chicken based on the scientific publications since the year 2000. The literature review showed a constant evolution and the knowledge about the form of housing that best expresses the genetics of birds. It was found that the thermal environment, air quality and other factors related to the housing of broiler chickens significantly imply in their performance.Keywords: thermal comfort, ambient cooling, flock density, broiler genetic strains. FATORES QUE AFETAM A PRODUÇÃO DE FRANGOS DE CORTEO Brasil ocupa uma posição privilegiada em todo o mundo na produção de frangos de corte. A atividade econômica é reconhecida como necessária para o PIB do país, que também possui uma expressiva diversidade climática. Por isso, diferentes tipos de aviários foram e ainda são construídos no território nacional. O objetivo deste estudo foi apresentar uma revisão sistemática dos fatores que têm impacto na produção intensiva de frangos de corte com base nas publicações científicas desde o ano 2000. A revisão da literatura mostrou evolução constante e conhecimento sobre a forma de alojamento que melhor expressa a genética dos frangos. Verificou-se que o ambiente térmico, a qualidade do ar e outros fatores relacionados ao alojamento de frangos de corte impactam expressivamente no desempenho.Palavras chaves: conforto térmico, refriamento de ambiente, linhagens genéticas de frangos.* Irenilza

“…Studies comparing changes in broiler surface temperature suggest that this variation is associated with room temperature or withdietary energy content (Ferreira et al, 2011). In addition, average broiler Ts is also related with the temperatures of features of the rearing environment, such as side curtains and litter surface temperature (Baracho et al, 2011;Nascimento et al, 2014).Body surface temperature can vary in the different body parts as the broiler grows, depending on air temperature and the birds' feathering (Nääs et al, 2010). In the present study, possibly both evaluated broiler houses (with fluorescent and LED light sources) maintained ideal environmental conditions for each phase of the grow-out period.…”

Section: Surface Temperature During the Initial Grow-out Phasementioning

confidence: 99%

Broiler Surface Temperature and Behavioral Response under Two Different Light Sources

Araújo

Garcia

Rev. Bras. Cienc. Avic.

et al. 2015

Light is an important environmental variable for the regulation and control of broiler behavior. Some light sources may also add heat to the rearing environment, and indirectly affect the heat exchange between the birds and the environment. This study aimed at investigation the surface temperature and behavioral response of broilers reared in an environment with monochromatic light emitted diode (LED). Broilers were reared inside commercial dark houses under two treatments: fluorescent or LED light sources. Bird surface temperature and behavior was monitoredfrom the first day of grow-out. The houses were virtually divided in four quadrants, and the variables were monitored in the geometric center of each quadrant. Surface temperature results were mapped, behavioral responses were divided as normal and abnormal, and their interaction with light source was tested. Broiler surface temperature in both houses presented lack of homogeneity, independently of the light source. No effect of the light source on any of the evaluated behavior was found in the present study. The long life and energy savings obtained with the LED light source suggest its use in broiler production.