| daily torpor and energetics in a tropical mammal, the northern blossom-bat macroglossus minimus (megachiroptera). | little is known about torpor in the tropics or torpor in megachiropteran species. we investigated thermoregulation, energetics and patterns of torpor in the northern blossom-bat macroglossus minimus (16 g) to test whether physiological variables may explain why its range is limited to tropical regions. normothermic bats showed a large variation in body temperature (tb) (33 to 37 degrees c) over a wide range of ambient temperatures (tas) and a relatively low basal metabolic rate (1.29 ml o2 g-1 h ... | 1998 | 9591364 |
| measuring subcutaneous temperature and differential rates of rewarming from hibernation and daily torpor in two species of bats. | prolonged and remote measurement of body temperature (tb) in undisturbed small hibernators was not possible in the past because of technological limitations. although passive integrated transponders (pits) have been used previously to measure subcutaneous temperature (tsub) during daily torpor in a small marsupial, no study has attempted to use these devices at tbs below 10°c. therefore, we investigated whether subcutaneous interscapular pits can be used as a viable tool for measuring tb in a sm ... | 2015 | 26300411 |
| an ultrastructural study of megachiropteran (mammalia: chiroptera) spermatozoa: implications for chiropteran phylogeny. | the fine structure of epididymal or electro-ejaculated spermatozoa of pteropus poliocephalus, p. scapulatus, p. conspiculatus, p. alecto and syconycteris australis is described. the sperm of all species were found to be very similar. the head is extremely flattened and spatulate; the nucleus is capped by a long acrosome that comprises the proximal half of the head and covers two-thirds of the nucleus area, and a prominent sub-acrosomal space possesses a unique 'anvil'-like shape. redundant nucle ... | 1986 | 3959152 |
| field metabolic rates and water uptake in the blossom-bat syconycteris australis (megachiroptera). | blossom-bats, syconycteris australis (18 g) are known to be highly active throughout the night. since this species frequently enters torpor, we postulated that their use of heterothermy may be related to a high energy expenditure in the field. to test this hypothesis we measured field metabolic rates (fmr) of s. australis at a subtropical site using the doubly labelled water (dlw) method. we also measured dlw turnover in captive animals held at constant ambient temperature (ta) with ad libitum f ... | 1999 | 10227186 |
| seasonal changes in energetics and torpor patterns in the subtropical blossom-bat syconycteris australis (megachiroptera). | little is known about how animals from tropical and subtropical climates adjust their energy expenditure to cope with seasonal changes of climate and food availability. to provide such information, we studied the thermal physiology, torpor patterns and energetics of the nocturnal blossom-bat (syconycteris australis 18 g) from a subtropical habitat in both summer and winter. in both seasons, s. australis frequently entered daily torpor at ambient temperatures between 12 and 25°c when food and wat ... | 1998 | 28308026 |