Journal
JOURNAL OF EXPERIMENTAL BIOLOGY
Volume 207, Issue 12, Pages 2065-2070Publisher
COMPANY OF BIOLOGISTS LTD
DOI: 10.1242/jeb.00999
Keywords
Japanese quail; Coturnix japonica; temperature variability; energy expenditure; egg production
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The effect of temperature variability on laying birds was studied experimentally, using Japanese quail. Two aspects of temperature variability were investigated: the effects of regular daily variation in temperature, and of a sudden change in temperature. Both of these may become more common as a consequence of climate change. These manipulations were carried out at two levels of food supply. Energy expenditure increased with higher daily temperature variation, and also after a sudden change in temperature, taking several days to settle to a constant level. Manipulating daily temperature variation also resulted in smaller eggs being laid under more variable temperatures, when food quality was also low. The results demonstrate that day-to-day variation in temperature, as well as mean temperature, affects energy expenditure, which can have consequences for egg production.
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