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Effects of thermal conditioning during hatching and early growth on heat tolerance of japanese quail
Other Title(s)
دراسة أثر النظم الحرارية أثناء التفريخ و النمو المبكر على التحمل الحراري في السمان الياباني
Joint Authors
Khalil, Hasan Abd al-Ghaffar
Hasanayn, Ahmad Muhammad
Madi, Muhammad al-Sayyid
Gerken, M.
Source
Egyptian Journal of Animal Production
Issue
Vol. 45, Issue 1 (31 Jan. 2008), pp.55-69, 15 p.
Publisher
Egyptian Society of Animal Production
Publication Date
2008-01-31
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Topics
Abstract EN
The purpose of the present study was to investigate the effect of thermal conditioning on heat tolerance of Japanese quail.
A 3 x 2 factorial experimental design included three incubation temperature treatments: low (L, 36.1°C), control (C, 37.7°C) and high (H, 39.4°C), and two housing temperatures: natural winter climate (N, average, 25.7°C) and constant high (H, 35.0°C).
A total of 360 chicks were involved (60 in each experimental group).
Data were collected on body weight, feed intake and conversion, rectal temperature, hematocrit, oviposition day time and mortality rate until 14 wks of age.
Incubation treatments had significant impacts on most of the studied traits.
Juvenile body weight was depressed in birds incubated at low temperature.
From 6 wks, however, birds incubated at high temperature reached the highest body weights under housing heat stress indicating long-term adaptation effects of incubation under high temperature.
High housing temperature exerted significant adverse effects on most of the studied traits.
Rectal temperatures were significantly higher in heat stressed birds (42.57 vs.
41.92°C).
Total mortality rate was increased under high temperature (22.8 vs.
17.8%).
It was concluded that, adequately increased incubation temperature might help to increase heat tolerance in particular in adult Japanese quail by enhancing early physiological adaptation processes.
American Psychological Association (APA)
Khalil, Hasan Abd al-Ghaffar& Hasanayn, Ahmad Muhammad& Madi, Muhammad al-Sayyid& Gerken, M.. 2008. Effects of thermal conditioning during hatching and early growth on heat tolerance of japanese quail. Egyptian Journal of Animal Production،Vol. 45, no. 1, pp.55-69.
https://search.emarefa.net/detail/BIM-71439
Modern Language Association (MLA)
Khalil, Hasan Abd al-Ghaffar…[et al.]. Effects of thermal conditioning during hatching and early growth on heat tolerance of japanese quail. Egyptian Journal of Animal Production Vol. 45, no. 1 (Jan. 2008), pp.55-69.
https://search.emarefa.net/detail/BIM-71439
American Medical Association (AMA)
Khalil, Hasan Abd al-Ghaffar& Hasanayn, Ahmad Muhammad& Madi, Muhammad al-Sayyid& Gerken, M.. Effects of thermal conditioning during hatching and early growth on heat tolerance of japanese quail. Egyptian Journal of Animal Production. 2008. Vol. 45, no. 1, pp.55-69.
https://search.emarefa.net/detail/BIM-71439
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 65-67
Record ID
BIM-71439