Comment on “Ecological importance of the thermal emissivity of avian eggshells”. (English) Zbl 1397.92725

Summary: Eggshell emissivity must be known to determine accurately the cooling rate of avian eggs when the parent, after heating by conduction during the incubation, is temporarily absent. We estimate possible values of eggshell emissivities from in-situ measurements and spectral libraries. Emissivity is near to 1 (probably higher than 0.95) and therefore its effect on cooling rate may be negligible, with differences between the temperature of the egg assuming a value of \(\varepsilon=0.95\) and that of a blackbody \((\varepsilon=1)\) below \(0.2°\)C.
This article concerns [L. O. Björn et al., ibid. 301, 62–66 (2012; Zbl 1397.92713)].


92D40 Ecology
92C05 Biophysics
80A99 Thermodynamics and heat transfer


Zbl 1397.92713
Full Text: DOI


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