Body temperature,oxygen consumption,evaporative water loss and heart rate in the fennec |
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| Affiliation: | 1. Laboratorio de Ecología, Fisiología y Evolución de Organismos Acuáticos, Centro Austral de Investigaciones Científicas (CADIC-CONICET), B. Houssay 200, Ushuaia, Argentina;2. Laboratorio de Invertebrados Marinos, Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y de Diagnóstico (CEBBAD, Universidad Maimónides-CONICET), Hidalgo 775, Buenos Aires, Argentina;3. Instituto de Ecología y Desarrollo Sustentable (INEDES, CONICET-Universidad Nacional de Luján), Ruta 5 y 7, Luján. Argentina |
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| Abstract: | ab] - 1.1. Fennecs show marked diurnal variations of body temperature and heart rate.
- 2.2. Basal metabolic rate (0.358 ml/ghr) is 39% lower than predicted by body mass, minimal conductance is reduced for 23%.
- 3.3. Fennecs have a wide thermoneutral zone (23.4–32.0°C) and a low rate of evaporative water loss.
- 4.4. Basal heart rate is considerably reduced. Oxygen pulse increases with decreasing ambient temperature. The higher oxygen demands below thermal neutrality, however, are met primarily by a rise in heart rate.
- 5.5. Newborn fennecs show a metabolic response to cold from the first day of life.
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