Divergent field metabolic rates highlight the challenges of increasing temperatures and energy limitation in aquatic ectotherms

Oecologia ◽  
2020 ◽  
Vol 193 (2) ◽  
pp. 311-323 ◽  
Author(s):  
Karissa O. Lear ◽  
David L. Morgan ◽  
Jeff M. Whitty ◽  
Nicholas M. Whitney ◽  
Evan E. Byrnes ◽  
...  
Keyword(s):  
Metabolic Rates ◽  
Energy Limitation ◽  
Field Metabolic Rates

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

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.

scholarly journals Free-swimming northern elephant seals have low field metabolic rates that are sensitive to an increased cost of transport

2014 ◽  
Vol 217 (9) ◽  
pp. 1485-1495 ◽  
Author(s):  
J. L. Maresh ◽  
S. E. Simmons ◽  
D. E. Crocker ◽  
B. I. McDonald ◽  
T. M. Williams ◽  
...  
Keyword(s):  
Metabolic Rates ◽  
Free Swimming ◽  
Cost Of Transport ◽  
Elephant Seals ◽  
Low Field ◽  
Northern Elephant Seals ◽  
Field Metabolic Rates

Estimating field metabolic rates of pinnipeds: doubly labelled water gets the seal of approval

2008 ◽  
Vol 22 (2) ◽  
pp. 245-254 ◽  
Author(s):  
C. E. Sparling ◽  
D. Thompson ◽  
M. A. Fedak ◽  
S. L. Gallon ◽  
J. R. Speakman
Keyword(s):  
Metabolic Rates ◽  
Doubly Labelled Water ◽  
Field Metabolic Rates ◽  
Seal Of Approval

Use of acceleration loggers in aquaculture to determine net-cage use and field metabolic rates in red sea bream Pagrus major

2011 ◽  
Vol 78 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Tohya Yasuda ◽  
Kazuyoshi Komeyama ◽  
Keitaro Kato ◽  
Yasushi Mitsunaga
Keyword(s):  
Red Sea ◽  
Sea Bream ◽  
Metabolic Rates ◽  
Red Sea Bream ◽  
Pagrus Major ◽  
Net Cage ◽  
Field Metabolic Rates

scholarly journals Accounting for body mass effects in the estimation of field metabolic rates from body acceleration

2021 ◽  
pp. jeb.233544
Author(s):  
Evan E. Byrnes ◽  
Karissa O. Lear ◽  
Lauran R. Brewster ◽  
Nicholas M. Whitney ◽  
Matthew J. Smukall ◽  
...  
Keyword(s):  
Body Mass ◽  
Predictive Models ◽  
Scale Dependence ◽  
Metabolic Rates ◽  
Body Acceleration ◽  
Mass Effects ◽  
Order Of Magnitude ◽  
Field Metabolic Rates ◽  
Free Ranging ◽  
Modelling Process

Dynamic Body Acceleration (DBA), measured through animal-attached tags, has emerged as a powerful method for estimating field metabolic rates of free-ranging individuals. Following respirometry to calibrate oxygen consumption rate (MO2) with DBA under controlled conditions, predictive models can be applied to DBA data collected from free-ranging individuals. However, laboratory calibrations are generally performed on a relatively narrow size range of animals, which may introduce biases if predictive models are applied to differently sized individuals in the field. Here, we tested the mass dependence of the DBA-MO2 relationship to develop an experimental framework for the estimation of field metabolic rates when organisms differ in size. We performed respirometry experiments with individuals spanning one order of magnitude in body mass (1.74–17.15 kg) and used a two-stage modelling process to assess the intraspecific scale dependence of the MO2-DBA relationship and incorporate such dependencies into the coefficients of MO2 predictive models. The final predictive model showed scale dependence; the slope of the MO2-DBA relationship was strongly allometric (M1.55), whereas the intercept term scaled closer to isometry (M1.08). Using bootstrapping and simulations, we evaluated the performance of this coefficient-corrected model against commonly used methods of accounting for mass effects on the MO2-DBA relationship and found the lowest error and bias in the coefficient-corrected approach. The strong scale dependence of the MO2-DBA relationship indicates that caution must be exercised when models developed using one size class are applied to individuals of different sizes.

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.

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