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Oxygen consumption, evaporative water loss and body temperature in the Sooty Tern, Sterna fuscata

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Title: Oxygen consumption, evaporative water loss and body temperature in the Sooty Tern, Sterna fuscata
Authors: MacMillen, Richard E.
Whittow, G Causey
Christopher, Ernest A.
Ebisu, Roy J.
Keywords: Sterna fuscata
LC Subject Headings: Sooty tern -- Physiology.
Birds -- Physiology.
Body temperature -- Regulation.
Issue Date: Apr 1975
Publisher: Island Ecosystems IRP, U.S. International Biological Program
Citation: MacMillen RE, Whittow GC, Christopher EA, Ebisu RJ. 1975. Oxygen consumption, evaporative water loss and body temperature in the Sooty Tern, Sterna fuscata. Honolulu (HI): Island Ecosystems IRP, U.S. International Biological Program. International Biological Program Technical Report, 60. 15 pages
Series/Report no.: International Biological Program Technical Report
Abstract: 1.The oxygen consumption, total evaporative water loss, and deep-body temperature of Sooty Terns were measured at air temperatures within the range 10°C - 45°C.
2. At air temperatures from 10°C to 30°C, the cloacal temperatures were relatively constant, the temperature of the fledglings tending to exceed that of the adults. At air temperatures of 35°C and higher, the birds became hyperthermic.
3. The thennoneutral temperature was approximately 30°C. The heat production of the terns was lower than the predicted value for non-passerine birds of their weight.
4 . Thermal polynea was observed at the higher air temperatures, but at an air temperature of 44°C - 45°C, only one bird was able to dissipate heat in excess of heat production, by evaporative cooling.
5. The calculated thermal conductance was constant at air temperatures of 10-30°C, but the conductance increased at higher temperatures.
6. It was concluded that Sooty Terns are not especially proficient at evaporative cooling, in spite of the thermal demands of their tropical environment. They appear to rely also on a rather low level of heat production, air movement and behavioral mechanisms of temperature regulation.
Description: Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in.
Sponsor: Supported by NSF Grant GB-23230 and GB 29287X Island Ecosystems IRP/IBP Hawaii, and from the Primo Foundation
Pages/Duration: 15 pages
Rights: CC0 1.0 Universal
Appears in Collections:International Biological Program Technical Reports (1970-1975)

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