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Metabolic response to air temperature and wind in day-old mallards and a standard operative temperature scale

Physiological and Biochemical Zoology

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Abstract

Most duckling mortality occurs during the week following hatching and is often associated with cold, windy, wet weather and scattering of the brood. We estimated the thermoregulatory demands imposed by cold, windy weather on isolated 1-d-old mallard (Anas platyrhynchos) ducklings resting in cover. We measured O-2 consumption and evaporative water loss at air temperatures from 5 degrees to 25 degrees C and wind speeds of 0.1, 0.2, 0.5, and 1.0 mis. Metabolic heat production increased as wind increased or temperature decreased but was less sensitive to wind than that of either adult passerines or small mammals. Evaporative heat loss ranged from 5% to 17% of heat production. Evaporative heal loss and the ratio of evaporative heat loss to metabolic heat production was significantly lower in rest phase. These data were used to define a standard operative temperature (T-es) scale for night or heavy overcast conditions. An increase of wind speed from 0.1 to 1 mis decreased T-es by 3 degrees-5 degrees C.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Metabolic response to air temperature and wind in day-old mallards and a standard operative temperature scale
Series title:
Physiological and Biochemical Zoology
Volume
72
Issue:
6
Year Published:
1999
Language:
English
Publisher:
Indiana State Univ, Dept of Life Sciences
Publisher location:
Terre Haute,IN
Contributing office(s):
Upper Midwest Environmental Sciences Center
Description:
pp. 656-665
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Physiological and Biochemical Zoology
First page:
656
Last page:
665
Number of Pages:
10