. The Australian zoologist. Zoology; Zoology; Zoology. M. L AUQEE are used in the present study to examine the role of heat loss in temperature regu- lation of echidnas. MATERIALS AND METHODS The experimental group comprised seven aculeatus, five T. a. setosus and three T .a. acanthion. Body temperatures (Tb) were taken once in the morning, once in the afternoon and and once in the evening by means of a thermocouple probe inserted through the base of a spine as previously described (Augee and Ealey 1968). Oxygen consumption was deter- mined using open circuit respirometry and a Kipp and Z
. The Australian zoologist. Zoology; Zoology; Zoology. M. L AUQEE are used in the present study to examine the role of heat loss in temperature regu- lation of echidnas. MATERIALS AND METHODS The experimental group comprised seven aculeatus, five T. a. setosus and three T .a. acanthion. Body temperatures (Tb) were taken once in the morning, once in the afternoon and and once in the evening by means of a thermocouple probe inserted through the base of a spine as previously described (Augee and Ealey 1968). Oxygen consumption was deter- mined using open circuit respirometry and a Kipp and Zonen Diaferometer (MG4). The experiments were carried out from Aug. to Nov. in a constant temperature room capable of holding the designated temperature within In order to study acclimation, the animals were held at least a week at each level of ambient temperature (Ta), and the Ta was lowered to 5°C and then raised to 30°C in a stepwise manner as shown: Ta 20°C 16 days 15 7 10 14 5 21 10 7 15 7 20 7 25 7 30 7 Food as described by Augee and Ealey (1968) was supplied ad lib throughout the study. All animals retained normal body weight, and there were no instances of torpor. 34r 32 O <L 28 6 26 O. ' t I1 AMBIENT TEMP FIG. 1.—Mean Tb for animals of the subspecies Tachyglossus aculeatus setosus (open circles), T. a. aculeatus (closed circles) and T. a. acanthion (crosses) upon exposure to Ta regimes as described in text. FIG. 2—Mean oxygen _ consumption for animals of the subspecies Tachyglossus aculeatus acanthion (diagonal stripes), T. a. aculeatus (solid dots) and T. a. setosus (open circles) upon exposure to Ta regimes as described in text. 106. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Royal Zoological Society of New South Wales; Royal Zoological Society of New South Wales. Proceeding
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1914
