Field Metabolic Rates of Walrus (Odobenus rosmarus) Measured by the Doubly Labeled Water Method

2006 ◽  
Vol 32 (3) ◽  
pp. 363-369 ◽  
Author(s):  
Mario Acquarone ◽  
Erik W. Born ◽  
John R. Speakman
Keyword(s):  
Doubly Labeled Water ◽  
Metabolic Rates ◽  
Odobenus Rosmarus ◽  
Doubly Labeled Water Method ◽  
Field Metabolic Rates

scholarly journals Field metabolic rates of giant pandas reveal energetic adaptations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wenlei Bi ◽  
Rong Hou ◽  
Jacob R. Owens ◽  
James R. Spotila ◽  
Marc Valitutto ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Metabolic Rate ◽  
Grizzly Bears ◽  
Metabolic Rates ◽  
Giant Pandas ◽  
Fat Stores ◽  
Doubly Labeled Water Method ◽  
Field Metabolic Rates ◽  
Predicted Values

AbstractKnowledge of energy expenditure informs conservation managers for long term plans for endangered species health and habitat suitability. We measured field metabolic rate (FMR) of free-roaming giant pandas in large enclosures in a nature reserve using the doubly labeled water method. Giant pandas in zoo like enclosures had a similar FMR (14,182 kJ/day) to giant pandas in larger field enclosures (13,280 kJ/day). In winter, giant pandas raised their metabolic rates when living at − 2.4 °C (36,108 kJ/day) indicating that they were below their thermal neutral zone. The lower critical temperature for thermoregulation was about 8.0 °C and the upper critical temperature was about 28 °C. Giant panda FMRs were somewhat lower than active metabolic rates of sloth bears, lower than FMRs of grizzly bears and polar bears and 69 and 81% of predicted values based on a regression of FMR versus body mass of mammals. That is probably due to their lower levels of activity since other bears actively forage for food over a larger home range and pandas often sit in a patch of bamboo and eat bamboo for hours at a time. The low metabolic rates of giant pandas in summer, their inability to acquire fat stores to hibernate in winter, and their ability to raise their metabolic rate to thermoregulate in winter are energetic adaptations related to eating a diet composed almost exclusively of bamboo. Differences in FMR of giant pandas between our study and previous studies (one similar and one lower) appear to be due to differences in activity of the giant pandas in those studies.

scholarly journals High levels of isotope elimination improve precision and allow individual-based measurements of metabolic rates in animals using the doubly labeled water method

2015 ◽  
Vol 3 (11) ◽  
pp. e12552 ◽  
Author(s):  
Masaki Shirai ◽  
Yasuaki Niizuma ◽  
Maki Yamamoto ◽  
Emiko Oda ◽  
Naoyuki Ebine ◽  
...  
Keyword(s):  
Doubly Labeled Water ◽  
Metabolic Rates ◽  
Doubly Labeled Water Method

Effect of Wind on Field Metabolic Rates of Breeding Northern Fulmars

Ecology ◽  
1996 ◽  
Vol 77 (4) ◽  
pp. 1181-1188 ◽  
Author(s):  
Robert W. Furness ◽  
David M. Bryant
Keyword(s):  
Metabolic Rates ◽  
Field Metabolic Rates ◽  
Northern Fulmars

Validation of single-sample doubly labeled water method

1989 ◽  
Vol 256 (2) ◽  
pp. R572-R576 ◽  
Author(s):  
M. D. Webster ◽  
W. W. Weathers
Keyword(s):  
Water Flux ◽  
Passerine Bird ◽  
Single Sample ◽  
Co2 Production ◽  
Doubly Labeled Water ◽  
Water Turnover ◽  
Sample Technique ◽  
Doubly Labeled Water Method ◽  
The One ◽  
Sample Method

We have experimentally validated a single-sample variant of the doubly labeled water method for measuring metabolic rate and water turnover in a very small passerine bird, the verdin (Auriparus flaviceps). We measured CO2 production using the Haldane gravimetric technique and compared these values with estimates derived from isotopic data. Doubly labeled water results based on the one-sample calculations differed from Haldane values by less than 0.5% on average (range -8.3 to 11.2%, n = 9). Water flux computed by the single-sample method differed by -1.5% on average from results for the same birds based on the standard, two-sample technique (range -13.7 to 2.0%, n = 9).

Longitudinal assessment of energy expenditure in pregnancy by the doubly labeled water method

1993 ◽  
Vol 57 (4) ◽  
pp. 494-505 ◽  
Author(s):  
G R Goldberg ◽  
A M Prentice ◽  
W A Coward ◽  
H L Davies ◽  
P R Murgatroyd ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Doubly Labeled Water ◽  
Longitudinal Assessment ◽  
Doubly Labeled Water Method ◽  
In Pregnancy

Resting and field metabolic rates of Awassi sheep and Baladi goats raised by Negev bedouin

2020 ◽  
Vol 158 (5) ◽  
pp. 431-437
Author(s):  
Michael Kam ◽  
Shaher El-Meccawi ◽  
Arieh Brosh ◽  
A. Allan Degen
Keyword(s):  
Metabolic Rate ◽  
Resting Metabolic Rate ◽  
Arid Areas ◽  
Metabolic Rates ◽  
Herbaceous Vegetation ◽  
Sheep And Goats ◽  
Awassi Sheep ◽  
Natural Pasture ◽  
Field Metabolic Rates ◽  
The Cost

AbstractSheep are grazers and goats are intermediate feeders. By employing O2 consumption and heart rate measurements, resting metabolic rate (RMR) and field metabolic rate (FMR) were determined in four male fat-tailed Awassi sheep (44.0 ± 3.94) and four male Baladi goats (35.5 ± 5.42 kg) that were co-grazing natural pasture in the Negev Desert. There were 67.7 ± 3.75 g DM/m2 of herbaceous vegetation biomass, which was rapidly becoming senescent and more fibrous. We hypothesized that FMR of these desert-adapted ruminants would be relatively low when compared to other sheep and goat breeds, as animals in arid areas tend to have low metabolic rates. Both sheep (n = 6) and goats (n = 6) foraged 71% of the allotted 11 h free-pasture period; however, sheep grazed more than goats (P < 0.001); whereas goats browsed more than sheep (P < 0.001). RMR was higher (P = 0.007) in sheep than in goats (529 ± 23.5 v. 474 ± 25.4 kJ/kg0.75 BW/d), but FMR did not differ between species (618 ± 55.7 v. 613 ± 115.2 kJ/kg0.75 BW/d). In addition, the cost of activities, as a proportion of FMR, did not differ between sheep and goats; FMR increased by 89 kJ/kg0.75 BW/d or 17% in sheep and by 138 kJ/kg0.75 BW/d or 29% in goats. In comparing FMRs of sheep and goats in this study with these species in other studies, differences were inconsistent and, therefore, our hypothesis was not supported.

Sign in / Sign up

Export Citation Format

Share Document