Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 315627
Title Cost reduction in the cold: heat generated by terrestrial locomotion partly substitutes for thermoregulation costs in Knot Calidris canutus
Author(s) Bruinzeel, L.W.; Piersma, T.
Source Ibis 140 (1998)2. - ISSN 0019-1019 - p. 323 - 328.
Department(s) Institute for Forestry and Nature Research
Publication type Refereed Article in a scientific journal
Publication year 1998
Abstract To test whether heat generated during locomotion substitutes for the thermoregulation cost, oxygen consumption of four post-absorptive temperate-wintering Knot Calidris canutus was measured at air temperatures of 25 degrees C (thermoneutral) and 10 degrees C (c. 10 degrees below the lower critical temperature) when the birds were at rest at night and during running on a treadmill, After allowing for body mass, the thermoregulation cost at 10 degrees C was significantly lower in active birds compared with birds at rest, At rest, the birds spent, on average, 0.50 watt (W; range, 0.47-0.57 W) on thermoregulation. During exercise, this cost factor averaged 0.33 W (range, 0.25-0.42 W), The average difference in thermoregulation cost was 35% (ranging from26% to 49% between individuals) and provides an estimate of the amount of substituted heat, A review of nine studies, all restricted to small birds, showed that substitution is a widespread phenomenon, The consequences of such partial substitution for the annual energetics of Knot wintering in the temperate Wadden Sea v tropical west Africa are examined, Compared with a previous additive model, the model which includes substitution (i.e. the use of heat produced during activity) reduces the differences in maintenance metabolism between the two wintering strategies by 17%, from 1.19 W to 0.99 W. VA:IBN
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