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EFFECT OF THERMAL STIMULATION IN EMBRYOS FROM COBB®GENETIC STRAIN UNDER COMMERCIAL SCALE REA
Flores,Fernanda; Nääs,Irenilza De A.; Garcia,Rodrigo G..
ABSTRACT Studies aimed at producing stronger birds and with better growth performance are being developed involving artificial incubation. To that extent, thermal stimulation by the heat of 1.39 ºC and 1ºC above the standard, and by cold of 36 ºC fixed, were applied in the last week of the embryonic development (day 14 to day 18) to Cobb® strain birds of 33 to 53 weeks age. With the purpose of evaluating the behavior of the embryos facing these temperature stimuli to identify what is the best amplitude, frequency and the most appropriate period to perform temperature variation, obtaining more adapted birds to the field. It has been observed that heat or cold stimulation did not cause embryo mortality and did not affect the hatching and the quality of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hatchability; Incubation; Chick quality; Thermal variation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200236
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Thermal stimulation of Ross®-lineage embryos on a commercial scale Ciência Rural
Flores,Fernanda; Nääs,Irenilza de Alencar; Garcia,Rodrigo Garófallo; Souza,Lenise Inácio de.
ABSTRACT: Artificial incubation is an essential process to obtain healthy birds with good performance; nevertheless, it requires sustained improvement. During this process, incubation temperature is considered a critical factor, which has been studied. The objective of this study was to evaluate the development of Ross(r) embryos after hot and cold thermal stimulation. To this end, temperatures 1.39ºC above the standard temperature and a temperature fixed at 36.00ºC that varied 1.00 to 0.30ºC below the standard temperature were applied during the final embryonic development period (days 14 to 18) for three hours, on a commercial scale. Results revealed that hot and cold thermal stimulations did not cause embryo mortality; the hatching and chick quality...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Commercial incubation; Embryonic development; Hatching; Thermal conditioning.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000901668
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