2012
DOI: 10.1590/s1516-635x2012000100007
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Performance and egg quality of Japanese quails submitted to cyclic heat stress

Abstract: Aiming at evaluating the influence of cyclic temperatures on the performance and egg quality of Japanese quails an experiment was carried out with 480 birds after egg production peak. Birds were housed in a bioclimatic chamber with automatic temperature control that contained two rooms, one maintained at thermoneutral temperature (21 ºC) and the other adjusted for the tested cyclic temperatures (24, 27, 30, 33 and 36 ºC at a time). Each room had a battery of five floors and ten cages, with a capacity of 24 bir… Show more

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Cited by 56 publications
(45 citation statements)
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“…Laying hens in a state of heat stress have, as the first consequences, a lower feed intake and higher water intake, which reduce the availability of essential nutrients for production (Vercese et al, 2012). These conditions may explain the loss of body weight found in the experiment.…”
Section: Resultsmentioning
confidence: 88%
“…Laying hens in a state of heat stress have, as the first consequences, a lower feed intake and higher water intake, which reduce the availability of essential nutrients for production (Vercese et al, 2012). These conditions may explain the loss of body weight found in the experiment.…”
Section: Resultsmentioning
confidence: 88%
“…Esta redução se deve à consequência dos efeitos do desconforto térmico do ambiente sofrido pelas poedeiras que, além das alterações fisiológicas: elevação do pH sanguíneo, aceleração do rítmo cardíaco, fezes líquidas etc, elevando a ingestão de água e reduzindo o consumo de ração, ocorreu desvio de parte dos nutrientes para manutenção corporal da própria ave, que seriam disponibilizados para a produção, reduzindo o tamanho dos ovos, confirmado por Vercese et al (2012) que, testando codornas em câmara climática com diferentes temperaturas ambiente (21, 27, 30, 33 e 36 °C), observaram redução significativa a partir de 27 °C no consumo de ração, produção de ovos, no peso e na massa dos ovos.…”
Section: Resultsunclassified
“…O estudo da determinação da força de ruptura da casca do ovo é de grande importância para o setor avícola de produção de ovos, haja vista que a maioria das avaliações de qualidade da casca está relacionada com força de ruptura, porque quebras e perfurações são as principais causas de perda econômica . Vercese et al (2012) encontraram, ao avaliar a resistência à ruptura da casca de ovos de codornas em temperaturas ambiente (21, 24 e 30 °C) redução significativa em temperatura de 30 °C relativamente à obtida sob temperatura termoneutra de 21 ºC.…”
Section: Resultsunclassified
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“…According to Koreleski & Swiatkiewicz (2011), methionine supplementation significantly increased egg weight and daily egg mass per hen. Further, Vercese et al (2012) explained that the egg mass is influenced by egg weight and egg production.…”
Section: Quail Productive Performancesmentioning
confidence: 99%