Fasting metabolism and thermoregulatory competence of the star-nosed mole, Condylura cristata (Talpidae: Condylurinae).

摘要: Metabolic and body temperature (Tb) responses of star-nosed moles (Condylura cristata) exposed to air temperatures ranging from 0 33°C were investigated. The thermoneutral zone this semi-aquatic mole extended 24.5 33°C, over which its basal rate metabolism averaged 2.25 ml O2 g 1 h (45.16 J ). This is higher than predicted for terrestrial forms, substantially other examined date. Minimum thermal conductance was nearly identical that similar-sized eutherians may represent a compromise between the need dissipate heat while digging foraging in subterranean burrows, conserve avoid hypothermia during exposure cold. C. cristata precisely regulated Tb (mean 9SE37.790.05°C) entire range test temperatures. Over three separate 24-h periods, radio-implanted varied 36.6 38.8°C, generally tracked level activity. No obvious circadian variation activity apparent, although cyclic 2‐4 intervals punctuated by periods inactivity lasting 3‐5 routinely observed. We suggest elevated metabolic relatively high reflect habits unique talpid. © 1999 Elsevier Science Inc. All rights reserved.