Influence of sudden temperature changes on oxygen consumption and heart rate in chickens in light and dark environments
1978 ◽
Vol 90
(3)
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pp. 605-609
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Keyword(s):
SummarySeven-week-old White Rock males were exposed to step-wise increases in ambient temperatures from 7·7 to 37·7 °C in light and dark environments. Heart rate decreased with increasing ambient temperature with a quadratic slope (P ≤ 0·0001). Heart rate was lower during the dark period than during the light period (P ≤ 0·06). There was a positive linear correlation between heart rate and oxygen consumption (γ = 0·997) for ambient temperatures from 7·7 to 37·7 °C.Body temperatures began to increase significantly when ambient temperature reached beyond 27·5 °C. The increases followed a quadratic slope (P ≤ 0·0001). Body temperatures during the light period were significantly higher than during the dark period (P ≤ 0·05).
1995 ◽
Vol 198
(4)
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pp. 931-937
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1962 ◽
Vol 15
(2)
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pp. 386
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1960 ◽
Vol 199
(2)
◽
pp. 243-245
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Keyword(s):
1965 ◽
Vol 20
(3)
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pp. 405-410
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