scholarly journals Estimating activity-specific energy expenditure in a teleost fish, using accelerometer loggers

2014 ◽  
Vol 496 ◽  
pp. 19-32 ◽  
Author(s):  
S Wright ◽  
JD Metcalfe ◽  
S Hetherington ◽  
R Wilson
Keyword(s):  
Energy Expenditure ◽  
Specific Energy ◽  
Teleost Fish ◽  
Specific Energy Expenditure

Seasonal sex-specific energy expenditure in breeding and non-breeding Palestine sunbirds Nectarinia osea

2007 ◽  
Vol 38 (2) ◽  
pp. 190-197
Author(s):  
Catherine Hambly ◽  
Shai Markman ◽  
Lizanne Roxburgh ◽  
Berry Pinshow
Keyword(s):  
Energy Expenditure ◽  
Specific Energy ◽  
Specific Energy Expenditure

Seasonal sex–specific energy expenditure in breeding and non-breeding Palestine sunbirds Nectarinia osea

2007 ◽  
Vol 38 (2) ◽  
pp. 190-197 ◽  
Author(s):  
Catherine Hambly ◽  
Shai Markman ◽  
Lizanne Roxburgh ◽  
Berry Pinshow
Keyword(s):  
Energy Expenditure ◽  
Specific Energy ◽  
Specific Energy Expenditure

scholarly journals Pandolf Equation Efficacy In Predicting Gender-Specific Energy Expenditure Differences While Carrying Light To Heavy Loads

2018 ◽  
Vol 50 (5S) ◽  
pp. 638-639
Author(s):  
Victoria A. Gregory ◽  
Charles S. Fulco ◽  
Peter N. Frykman ◽  
Rebecca E. Fellin ◽  
Nathaniel I. Smith ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Specific Energy ◽  
Specific Energy Expenditure ◽  
Heavy Loads ◽  
Gender Specific

scholarly journals ENHANCEMENT OF THE HYDROCARBONS PYROLYSIS SELECTIVITY

2017 ◽  
pp. 121-125
Author(s):  
E. R. Magaril ◽  
R. Z. Magaril
Keyword(s):  
Energy Expenditure ◽  
Specific Energy ◽  
Raw Materials ◽  
Relative Reactivity ◽  
Methyl Radicals ◽  
Hydrogen Atoms ◽  
Specific Energy Expenditure ◽  
Inert Diluent ◽  
Lower Olefins ◽  
Liquid Products

Data was obtained on relative reactivity for different type bonds in reactions with hydrogen atoms, methyl radicals, and also on effective relative reactivities when using an inert diluent, allowing deepening the knowledge about pyrolysis of raw materials of a given composition. A method has been developed for increasing selectivity of process for target products (lower olefins), lowering yields of liquid products of condensation and specific energy expenditure, based on influence of hydrogen on thermic reactions of alkanes and alkenes.

scholarly journals Scaling of lunge-feeding performance in rorqual whales: mass-specific energy expenditure increases with body size and progressively limits diving capacity

2011 ◽  
Vol 26 (1) ◽  
pp. 216-226 ◽  
Author(s):  
Jeremy A. Goldbogen ◽  
John Calambokidis ◽  
Donald A. Croll ◽  
Megan F. McKenna ◽  
Erin Oleson ◽  
...  
Keyword(s):  
Body Size ◽  
Energy Expenditure ◽  
Specific Energy ◽  
Specific Energy Expenditure ◽  
Feeding Performance ◽  
Lunge Feeding

Varying energetic costs of Brent Geese along a continuum from aquatic to agricultural habitats: the importance of habitat-specific energy expenditure

2012 ◽  
Vol 154 (1) ◽  
pp. 155-162 ◽  
Author(s):  
Kevin Kuhlmann Clausen ◽  
Preben Clausen ◽  
Anthony David Fox ◽  
Casper Cæsar Fælled ◽  
Jesper Madsen
Keyword(s):  
Energy Expenditure ◽  
Specific Energy ◽  
Energetic Costs ◽  
Specific Energy Expenditure

scholarly journals Validating accelerometry-derived proxies of energy expenditure using the doubly-labelled water method in the smallest penguin species

Biology Open ◽  
2021 ◽  
pp. bio.055475
Author(s):  
G. J. Sutton ◽  
J. A. Botha ◽  
J. R. Speakman ◽  
J. P. Y. Arnould
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
Energy Use ◽  
Travel Speed ◽  
Specific Energy Expenditure ◽  
Doubly Labelled Water ◽  
Data Collection And Analysis ◽  
Behavioural Patterns ◽  
Free Ranging ◽  
The Relationship

Understanding energy use is central to understanding an animal's physiological and behavioural ecology. However, directly measuring energy expenditure in free-ranging animals is inherently difficult. The doubly-labelled water (DLW) method is widely used to investigate energy expenditure in a range of taxa. Although reliable, DLW data collection and analysis is both financially costly and time consuming. Dynamic body acceleration (e.g. VeDBA) calculated from animal-borne accelerometers has been used to determine behavioural patterns, and is increasingly being used as a proxy for energy expenditure. Still its performance as a proxy for energy expenditure in free-ranging animals is not well established and requires validation against established methods. In the present study, the relationship between VeDBA and the at-sea metabolic rate calculated from DLW was investigated in little penguins (Eudyptula minor) using three approaches. Both in a simple correlation and activity-specific approaches were shown to be good predictors of at-sea metabolic rate. The third approach using activity-specific energy expenditure values obtained from literature did not accurately calculate the energy expended by individuals. However, all three approaches were significantly strengthened by the addition of mean horizontal travel speed. These results provide validation for the use of accelerometry as a proxy for energy expenditure and show how energy expenditure may be influenced by both individual behaviour and environmental conditions.

scholarly journals Sex-specific energy management strategies in response to training for increased foraging effort prior to reproduction

2021 ◽  
pp. jeb.235846
Author(s):  
Kang Nian Yap ◽  
Donald R. Powers ◽  
Melissa L. Vermette ◽  
Olivia Hsin-I Tsai ◽  
Tony D. Williams
Keyword(s):  
Energy Expenditure ◽  
Energy Management ◽  
Specific Energy ◽  
Management Strategies ◽  
Common Garden ◽  
Free Living ◽  
Foraging Effort ◽  
Specific Manner ◽  
Daily Energy ◽  
Males And Females

Free-living animals often engage in behaviour that involve high rates of workload and result in high daily energy expenditure (DEE), such as reproduction. However, the evidence for elevated DEE accompanying reproduction remain equivocal. In fact, many studies have found no difference in DEE between reproducing vs. non-reproducing females. One of the hypotheses explaining the lack of difference is the concept of energetic ceiling. However, it is unclear whether the lack of increases in energy expenditure is due to the existence of an energetic ceiling and/or compensation by males during parental care. To investigate whether an energetic ceiling exists we experimentally manipulated foraging effort in captive zebra finches, Taeniopygia guttata, creating two groups with high- and low foraging effort followed by both groups breeding in a low foraging effort common garden condition. DEE was measured in both sexes throughout the experiment. Our findings showed sex-specific energy management strategies in response to training for increased foraging effort prior to reproduction. Specifically, males and females responded differently to high foraging effort treatment and subsequently to chick rearing in terms of energy expenditure. Our results also suggested that there appears to be an energetic ceiling in females and that energetic costs incurred prior to reproduction can be carried over into subsequent stages of reproduction in a sex-specific manner.

A theoretical analysis of recirculation in pulp refiners

TAPPI Journal ◽  
2014 ◽  
Vol 13 (4) ◽  
pp. 29-32 ◽  
Author(s):  
R.J. KEREKES
Keyword(s):  
Energy Expenditure ◽  
Theoretical Analysis ◽  
Energy Distribution ◽  
Specific Energy ◽  
Average Energy ◽  
Constant Flow ◽  
Average Energy Expenditure

Expressions have been developed to describe the influence of recirculation on the energy distribution on pulp in refiners. It was shown that for constant pulp flow to downstream operations, the average energy expenditure on pulp does not change with recirculation, but the energy expended on components of the pulp flow varies widely. In the case of reduced fiber flow, the recirculation to maintain constant flow and the power to maintain constant average specific energy produces a change in both the energy distribution on pulp and refining intensity. The implications of these findings to pulp refining are discussed in this work.

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