The effect of wind speed and wetting on thermal resistance of the barn owl (Tyto alba). II: Coat resistance.

被引：11

作者：

McCafferty, DJ

Moncrieff, JB

Taylor, IR

机构：

[1] British Antarctic Survey, NERC, Cambridge CB3 0ET, England

[2] Univ Edinburgh, Inst Ecol & Resource Management, Div Biol Sci, Edinburgh EH9 3JU, Midlothian, Scotland

[3] Charles Sturt Univ, Johnstone Res Ctr, Albury, NSW 2640, Australia

来源：

JOURNAL OF THERMAL BIOLOGY | 1997年 / 22卷 / 4-5期

关键词：

plumage; coat resistance; wind; wetting; barn owl; Tyto alba;

D O I：

10.1016/S0306-4565(97)00021-1

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

1. The thermal resistance of barn owl (Tyro akin) plumage was determined from measurements of heat flux and temperature using a model in a wind tunnel. 2. The mean resistance of four barn owl coats was 398 s m(-1) and wetting the coat reduced coat resistance to 374 s m(-1). Resistance decreased linearly with increasing wind speed from 0-7 m s(-1). 3. Half of the heat transfer within barn owl coats occurred by conduction through the feather elements, the remaining heat transfer was due to molecular diffusion of air within the coat (30%), radiation (10%) and free convection (10%). 4. Thermal properties of barn owl plumage were comparable with previous findings on avian coats. (C) 1997 Elsevier Science Ltd. All rights reserved.

引用

页码：265 / 273

页数：9

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