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Keywords: energy expenditure
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Journal Articles
J Exp Biol (2020) 223 (10): jeb222232.
Published: 22 May 2020
... © 2020. Published by The Company of Biologists Ltd 2020 http://www.biologists.com/user-licence-1-1/ Editors' Choice: Empirical evidence that the ability to dissipate body heat constrains offspring feeding behaviour in a breeding bird, the tree swallow. Energy expenditure...
Journal Articles
J Exp Biol (2020) 223 (8): jeb218479.
Published: 16 April 2020
... that of novel or aversive odors, fox odor or moderate restraint stress. Exposure to predator odor increased energy expenditure, and both the thermogenic and energetic effects persisted when physical activity levels were controlled. Predator odor-induced muscle thermogenesis is subject to associative learning...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (22): jeb211771.
Published: 25 November 2019
...: McNabb, 2006 ; and the HPA axis: Jimeno et al., 2017 ; Landys et al., 2006 ]. Several studies have shown that these two axes and circulating levels of CORT and thyroid hormones are positively correlated with RMR, activity and energy expenditure in vertebrates (corticosterone: Astheimer et al., 1992...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (19): jeb198234.
Published: 08 October 2019
... reinforcement learning models reveals how the nervous system discovers energy optimal gaits. Sensorimotor control Exoskeletons Metabolic cost Energy expenditure Reinforcement learning People often learn optimal coordination strategies. That is, the nervous system has an objective for movement...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (12): jeb203588.
Published: 17 June 2019
... over the active season under flea-augmented and control conditions. We also measured the prevalence of an internal parasite ( Trypanosoma otospermophili ). Doubly labeled water (DLW) was intra-peritoneally injected at peak lactation to examine energy expenditure. Effects of parasites on oxidative...
Journal Articles
J Exp Biol (2019) 222 (6): jeb197434.
Published: 27 March 2019
... of the implications: regression dilution results in an underestimation of the true slope value. This is particularly problematic when the slope value is diagnostic. For example, energy management strategies of animals can be determined from the regression slope estimate of mean energy expenditure against resting...
Journal Articles
J Exp Biol (2018) 221 (23): jeb187880.
Published: 27 November 2018
... association to be significantly steeper in the hard foraging environment. This supports the metabolic explanation of GC variation, underlining the importance of accounting for variation in energy expenditure when interpreting GC variation. * Author for correspondence ( bjimenorev@gmail.com...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (14): jeb180703.
Published: 16 July 2018
.../user-licence-1-1/ Summary:   In vivo recordings of gut oxygen uptake in a teleost fish demonstrate a high metabolic sensitivity to an acute temperature increase, as well as the metabolic responses to stress. Gastrointestinal Teleost Oxygen consumption Metabolism Energy expenditure...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (17): 3154–3161.
Published: 01 September 2017
... energy expenditure, enhance thermoregulatory capacity and adjust functioning of the hypothalamic-pituitary-adrenal (HPA) axis to match the winter increase in energy demands. Within each season, stress plays an important role in the flexible adjustments of a phenotype to environmental perturbations...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (2): 161–166.
Published: 15 January 2017
... an ecological perspective. When animals move through their environment, they encounter topographical variation, and this is a key factor that can dramatically affect their energy expenditure. We collated published data on the costs for birds and mammals to locomote terrestrially on inclines, and investigated...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (21): 3321–3328.
Published: 01 November 2016
...: 5°C (similar to minimum nighttime temperatures during early breeding), 15°C (similar to nighttime temperatures during late breeding) and 28°C (thermal neutrality). Nest use alone had modest effects: even for solitary babblers at 5°C, it reduced nighttime energy expenditures by <15%. However...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (16): 2559–2566.
Published: 15 August 2016
...: Thyroid hormones and energy expenditure are correlated in a semi-free-living ungulate. Energy expenditure Food restriction Resting heart rate Horses Locomotor activity Thyroxine Triiodothyronine Animals living in the wild are exposed to changing environmental conditions. When...
Journal Articles
J Exp Biol (2015) 218 (5): 711–719.
Published: 01 March 2015
... at 2.3 m s −1 on an uneven terrain treadmill, with up to a 2.5 cm height variation. We hypothesized that running on uneven terrain would show increased energy expenditure, step parameter variability and leg stiffness compared with running on smooth terrain. Subject energy expenditure increased by 5...
Journal Articles
J Exp Biol (2014) 217 (24): 4320–4327.
Published: 15 December 2014
... domesticated animals are also able to reduce their energy expenditure. We exposed 10 Shetland pony mares to different environmental conditions (summer and winter) and to two food quantities (60% and 100% of maintenance energy requirement) during low winter temperatures to examine energetic and behavioural...
Journal Articles
J Exp Biol (2013) 216 (16): 3175–3182.
Published: 15 August 2013
...) with sporadic flapping, although little is known about how much time and energy albatrosses expend in flapping versus gliding during cruising flight. Here, we examined the heart rates (used as an instantaneous index of energy expenditure) and flapping activities of free-ranging black-browed albatrosses...
Journal Articles
J Exp Biol (2011) 214 (23): 3968–3971.
Published: 01 December 2011
... for correspondence ( mkam@bgu.ac.il ). 12 9 2011 © 2011. 2011 host–parasite relationship fleas average daily metabolic rate energy expenditure ecophysiology Gerbillus nanus Parasites may affect potential hosts directly, by reducing the resources of the host, and indirectly...
Journal Articles
J Exp Biol (2011) 214 (21): 3605–3612.
Published: 01 November 2011
...Dina K. N. Dechmann; Severin Ehret; Aline Gaub; Bart Kranstauber; Martin Wikelski SUMMARY Animals must optimize their daily energy budgets, particularly if energy expenditures are as high as they are in flying animals. However, energy budgets of free-ranging tropical animals are poorly known. Newly...
Journal Articles
J Exp Biol (2011) 214 (18): 3074–3081.
Published: 15 September 2011
..., and their relationships with energy expenditure in free-swimming sockeye salmon (Oncorhynchus nerka) . J. Comp. Physiol. B 180 , 673 - 684 . Cooke S. J. , Hinch S. G. , Farrell A. P. , Lapointe M. F. , Jones S. R. M. , Macdonald J. S. , Patterson D. A. , Healey M. C...
Journal Articles
J Exp Biol (2011) 214 (6): 963–970.
Published: 15 March 2011
... of hypometabolism. Our experimental results therefore support the hypothesis that a reduction in body temperature is a physiological mechanism employed even by large mammals, like red deer, to reduce their energy expenditure during periods of negative energy balance. * Author for correspondence...
Journal Articles
J Exp Biol (2011) 214 (4): 646–656.
Published: 15 February 2011
... expenditure. Successful animals generally maximize efficiency or rate of energy gain through foraging. Quantification of all features that modulate energy expenditure can theoretically be modelled as an animal energetic niche or power envelope; with total power being represented by the vertical axis and n...