... acceleration associated with movement, can be used to estimate DEE. Previous studies of DBA–DEE correlations in birds were carried out on species foraging below their thermoneutral zone, potentially decoupling the DBA–DEE relationship. We used doubly labelled water (DLW) to validate the use of DBA on plunge...

... biologging metrics (speed, wingbeat frequency, GPS position). We then compared these two approaches with estimates of energy expenditure from doubly labelled water (DLW). Energy expenditure estimated from DLW correlated with DBA, but the best model to estimate energy expenditure was based on time–energy...

... Australia, were equipped with GPS and tri-axial accelerometers and dosed with doubly labelled water (DLW) to measure energy expenditure during normal behaviour for 3–5 days. The correlation between daily energy expenditure from the DLW and vectorial dynamic body acceleration (VeDBA) was high for both...

...://www.biologists.com/user-licence-1-1/ Highlighted Article: Harbour porpoises are small marine mammals that have high field metabolic rates, and offset increased thermoregulatory costs in winter by building a thick blubber layer during the autumn. Bio-logging Doubly labelled water Energetics Food...

... temperatures, as distance to the nearest building increases. We used the doubly labelled water method to obtain 44 measurements of DEE from hedgehogs on four predominately arable sites, to determine the energetic costs associated with proximity to buildings, on sites with and without badgers. The mean±s.e.m...

...-ranging pelagic cormorants ( Phalacrocorax pelagicus ) and simultaneously estimating energy expenditure using doubly labelled water. Two different formulations of dynamic body acceleration, [vectorial and overall DBA (VeDBA and ODBA)], correlated with mass-specific energy expenditure (both R 2 =0.91...

... Summary: Fur removal increases both energy budget and reproductive output at peak lactation in a non-laboratory rodent, the bank vole, supporting the heat dissipation limit theory. Artificial selection Doubly labelled water Food consumption Maternal investment Milk energy output Thermal...

... in wild root voles ( Microtus oeconomus ) in their natural environment. We measured daily energy expenditure (DEE), using doubly labelled water in shaved and unshaved voles at the beginning of winter. The difference in DEE (corrected for body mass and year effects) between experimental and control group...

... lactation peripheral limitation hypothesis metabolizable energy intake daily energy expenditure milk energy output doubly labelled water prolactin thermal conductance milk production The sustained maximum rate of energy intake (SusEI) is an important trait because it may provide an upper...

... for correspondence at present address: Department of Biology, University of California at Riverside, Riverside, CA 92521, USA ( [email protected] ) 27 6 2012 2 10 2012 © 2013. 2013 basal metabolic rate BMR doubly labelled water field metabolic rate sustained metabolic scope Basal...

... the difference between metabolizable energy intake and daily energy expenditure measured by doubly labelled water, at 30°C was 23.3 kJ day –1 lower than that at 21°C on days 14–16 of lactation. As for reproductive performance, there was a difference in the response to the higher temperature between mothers...

... of flight in a wind tunnel by four European starlings Sturnus vulgaris made using three independent techniques: heat transfer modelling, doubly labelled water (DLW)and mask respirometry. We based our heat transfer model on thermal images of the surface temperature of the birds and air flow past the body...

... females were at day 14 of lactation. Body mass is the mean value for days 9–13 of lactation (reproductive females) or the mean value for eight consecutive days before the day of doubly labelled water (DLW) injection(non-reproductive females). Fig. 3. Total water turnover (rH2Ofem) as a function of body...

.... foraging) and (2)actually ingesting prey (i.e. processing food) that was (3) either hard-shelled or not (i.e. crushing). Energy expenditures, estimated by the doubly labelled water (DLW) method, calibrated for use in this particular condition, varied between 1.5 and 4 W. A hierarchical analysis of variance...

... and that there is an increase during the breeding season. We hypothesized that the difference in seasonal daily field metabolic rate would be a consequence of differences in daytime metabolic rate, and that night-time metabolic rate would be similar during the three seasons. We used doubly labelled water to determine daily...

...) in the general population, calculated as doubly-labelled-water-assessed average daily metabolic rate as a multiple of basal metabolic rate, has an upper limit of 2.2–2.5. The upper limit of sustainable metabolic rate is approximately twice as high in endurance athletes, mainly because of long-term exercise...

... internal organs and high metabolic capacities. We first measured the growth rate of nestlings in natural broods of five, six and seven over a 4-day period and then measured parental DEE using doubly labelled water. Adults were then dissected for analyses of body composition and to determine maximum enzyme...

... were measured using the 18 O doubly-labeled water technique, and diving behavior was measured with time/depth recorders (TDRs). Mean total body water was 66.0±1.1 % (mean ± S.D.) and mean rate of CO 2 production was 0.835±0.114 ml g −1 h −1 , which provides an estimated mass-specific field metabolic...

... . the doubly labelled water technique (DLW) and (ii) V ˙ O 2 measured using respirometry. A two-pool model produced the most accurate estimated V ˙ O 2 using DLW. Because of individual variability within mean values of V ˙ O 2 estimated using both techniques, there was no significant difference between mean V...

...Elzbieta Król; John R. Speakman ABSTRACT The isotope dilution technique for measuring total body water (TBW), and the doubly labelled water (DLW) method for measuring energy expenditure, are both sensitive to small variations in the ratio of the hydrogen to oxygen-18 dilution space. Since...