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Estimating the most important criteria for hatching eggs as function of broiler breeders age REA
Baracho,Marta dos S.; Nääs,Irenilza de A.; Neves,Diego P.; Cassiano,Juliano de A.; Lima,Fabiana G.; Moura,Daniella J. de; Garcia,Rodrigo G..
This research aimed to compare two female broiler breeder ages during the incubation period regarding management using the Analytic Hierarchy Process method (AHP). This method is characterized by the possibility of analyzing a multicriteria problem and assists a decision making. This study was carried out on a commercial hatchery located in São Paulo, Brazil. Two ages of broiler breeder (42 and 56 weeks) were compared relative to production rate. Production index data were the same in both ages and were submitted to multicriteria decision analysis using the AHP method. The results indicate that broiler breeders of 42 weeks presented better performance than those of 56 week-old. The setter phase (incubation) is more critical than the hatcher. The AHP method...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Multi-stage incubator; Multi criteria analysis; Broiler breeders' production.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000300002
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Heat loss in one day old pullets inside a hatchery REA
Nääs,Irenilza de A.; Graciano,Daniela E.; Garcia,Rodrigo G.; Santana,Mayara R. de; Neves,Diego P..
After hatching, pullets are transported to brooding area and vaccinated. One day old chicks have not already developed thermoregulation ability; thus, brooding temperature variations may affect pullet quality leading to broiler meat production losses. This research aimed to calculate sensible heat loss in one day old pullets in hatching area and vaccination room. Ten one day old pullets were randomly selected from hatching area of a commercial hatchery. Infrared images were used to calculate bird surface temperature. Exposure areas for the two conditions were quantified, and both air temperature and wind speed was recorded. Total sensible heat loss was calculated as heat loss by radiation plus heat loss by convection. It was found that heat transfer occurs...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sensible heat; Post-hatching; Infrared thermography.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000400001
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Termografia infravermelho na estimativa de conforto térmico de frangos de corte AGRIAMBI
Nascimento,Guilherme R. do; Nääs,Irenilza A.; Baracho,Marta S.; Pereira,Danilo F.; Neves,Diego P..
As instalações avícolas devem assegurar um ambiente de conforto térmico que proporcione ao animal expressar todo o seu potencial genético para produção motivo pelo qual novas ferramentas estão sendo aplicadas para medir o conforto térmico animal destacando-se as câmeras termográficas. Neste trabalho objetivou-se avaliar a associação da temperatura superficial das aves com as das instalações e estimar a transferência de calor sensível. Para isto foram registradas as condições térmicas de alojamento em dois aviários com sistemas de ventilação distintos, no período de março a abril de 2011. Os aviários foram divididos em seis quadrantes para a coleta das temperaturas superficiais obtidas através de uma câmera termográfica infravermelho. Em cada quadrante...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bem-estar; Temperatura superficial; Termorregulação.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000600014
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The impact of evaporative cooling on the thermoregulation and sensible heat loss of sows during farrowing REA
Justino,Eliene; Nääs,Irenilza de A.; Carvalho,Thayla M. R.; Neves,Diego P.; Salgado,Douglas D'Alessandro.
Pigs are more sensitive to high environmental temperatures explained by the inability of sweating and panting properly when compared to other species of farmed livestock. The evaporative cooling system might favor the thermal comfort of animals during exposure to extreme environmental heat and reduce the harmful effects of heat stress. The purpose of this study was to assess the sensible heat loss and thermoregulation parameters from lactating sows during summer submitted to two different acclimatization systems: natural and evaporative cooling. The experiment was carried out in a commercial farm with 72 lactating sows. The ambient variables (temperature, relative humidity and air velocity) and sows physiological parameters (rectal temperature, surface...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Ventilation; Thermal stress; Panting; Surface temperature; Swine; Lactation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600003
Registros recuperados: 4
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