... in small endotherms inhabiting cold environments. As a response, social clustering combined with nest use (=communal nesting) is a common strategy for heat conservation. To quantify the actual amount of energy that is saved by this strategy, we studied the social marsupial Dromiciops gliroides (monito del...

...Edward P. Snelling; David A. Taggart; Shane K. Maloney; Anthony P. Farrell; Christopher M. Leigh; Lyn Waterhouse; Ruth Williams; Roger S. Seymour ABSTRACT The heart and left ventricle of the marsupial western grey kangaroo Macropus fuliginosus exhibit biphasic allometric growth, whereby a negative...

... with other mammals. * Author for correspondence ( peter.frappell@utas.edu.au ) 12 3 2012 15 8 2012 © 2012. 2012 chemoresponse respiration marsupial neonatal development In most mammals, the respiratory system is sufficiently developed at birth to function as the sole...

...Koa N. Webster; Terence J. Dawson SUMMARY We examined the structure–function relationships that underlie the aerobic capacities of marsupial mammals that hop. Marsupials have relatively low basal metabolic rates (BMR) and historically were seen as ‘low energy’ mammals. However, the red kangaroo...

... quantitative data on the effect of continuous cold exposure during development on morphological and functional variables of a marsupial. Fat-tailed dunnarts ( Sminthopsis crassicaudata , Dasyuridae) were reared at an ambient temperature ( T a ) of 16°C [cold-reared (CR)] or 22°C [warm-reared (WR)] until...

... associated with HCO 3 – secretion and its distribution limits electrogenic HCO 3 – secretion to the ileum. * Author for correspondence ( grant.butt@otago.ac.nz ) 21 2 2011 © 2011. 2011 brushtail possum Trichosurus vulpecula marsupial ileum bicarbonate secretion CFTR...

..., NKCC1. However, ileal secretion in the brushtail possum, a marsupial, involves a fundamentally different process, since NKCC1 expression is low in this tissue and the secretagogue-induced short circuit current ( I sc )is insensitive to bumetanide. In view of these differences we have investigated...

...C. E. Cooper; P. C. Withers SUMMARY To better understand the effects of ambient relative humidity (RH) on physiological variables and the implications of RH-correcting evaporative water loss (EWL) data for marsupials, we examined the effect of RH on EWL,body temperature ( T b ), metabolic rate (MR...

...Kerry A. Daly; Christophe Lefévre; Kevin Nicholas; Elizabeth Deane; Peter Williamson SUMMARY Marsupials are born in a relatively underdeveloped state and develop during a period of intensive maturation in the postnatal period. During this period,the young marsupial lacks a competent immune system...

... oxygen consumption locomotion thermogenesis uncoupling protein 3 muscle mechanics marsupial Monodelphis domestica Animal locomotion requires that chemical energy be converted through metabolic processes to produce work; metabolic power thus generates mechanical power. The efficiency...

...Terence J. Dawson; Brock Mifsud; Matthew C. Raad; Koa N. Webster SUMMARY Marsupials and placentals together comprise the Theria, the advanced mammals, but they have had long independent evolutionary histories, with the last common ancestor occurring more than 125 million years ago. Although...

...C. E. Cooper; G. E. Walsberg; P. C. Withers SUMMARY Numbats are unusual marsupials in being exclusively diurnal and termitivorous. They have a sparse (1921 hairs cm -2 ) and shallow(1.19 mm) pelt compared with other marsupials. Coat reflectivity is low (19%)for numbats compared with nocturnal...

... kinematics kinetics locomotion opossum Monodelphis domestica marsupial Cursorially adapted vertebrates employ two basic patterns of locomotor mechanics that permit some degree of energy saving( Blickhan and Full, 1987 ; Cavagna et al., 1977 ; Heglund et al., 1982 ; Reilly and Biknevicius...

...Roberto F. Nespolo; Leonardo D. Bacigalupe; Pablo Sabat; Francisco Bozinovic SUMMARY The potential for thermal acclimation in marsupials is controversial. Initial studies suggest that the thermoregulatory maximum metabolic rate (MMR)in metatherians cannot be changed by thermal acclimation...

...R. V. Baudinette; E. Annette Halpern; David S. Hinds ABSTRACT In the marsupial, the potoroo, multiple regression analysis shows that ambient temperature makes a minor (2%) contribution towards variation in oxygen consumption with speed. This suggests that the heat generated during running...

... , A. P. , Nichols , W. W. & O’rourke , M. F. ( 1985 ). Propagation of pressure pulse in kangaroo arterial system . Ain. J. Physiol . 249 , R335 – R340 . Baudinette , R. V. , Nagle , K. A. & Scott , R. A. D. ( 1976 ). Locomotory energetics in a marsupial...