scholarly journals Dynamic body acceleration as a proxy to predict the cost of locomotion in bottlenose dolphins

2022 ◽  
Author(s):  
Austin S. Allen ◽  
Andrew J. Read ◽  
K. Alex Shorter ◽  
Joaquin Gabaldon ◽  
Ashley M. Blawas ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Marine Mammals ◽  
Bottlenose Dolphins ◽  
Activity Level ◽  
Energy Budgets ◽  
Activity Levels ◽  
Energetic Costs ◽  
Cetacean Species ◽  
Cost Of Transport ◽  
Body Acceleration

Estimates of the energetic costs of locomotion (COL) at different activity levels are necessary to answer fundamental eco-physiological questions and to understand the impacts of anthropogenic disturbance to marine mammals. We combined estimates of energetic costs derived from breath-by-breath respirometry with measurements of overall dynamic body acceleration (ODBA) from biologging tags to validate ODBA as a proxy for COL in trained common bottlenose dolphins (Tursiops truncatus). We measured resting metabolic rate (RMR); mean individual RMR was 0.71-1.42 times that of a similarly sized terrestrial mammal and agreed with past measurements which used breath-by-breath and flow-through respirometry. We also measured energy expenditure during submerged swim trials, at primarily moderate exercise levels. We subtracted RMR to obtain COL, and normalized COL by body size to incorporate individual swimming efficiencies. We found both mass-specific energy expenditure and mass-specific COL were linearly related with ODBA. Measurements of activity level and cost of transport (the energy required to move a given distance) improve understanding of the costs of locomotion in marine mammals. The strength of the correlation between ODBA and COL varied among individuals, but the overall relationship can be used at a broad scale to estimate the energetic costs of disturbance, daily locomotion costs to build energy budgets, and investigate the costs of diving in free-ranging animals where bio-logging data are available. We propose that a similar approach could be applied to other cetacean species.

scholarly journals Bottlenose dolphin habitat and management factors related to activity and distance traveled in zoos and aquariums

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0250687
Author(s):  
Lisa K. Lauderdale ◽  
K. Alex Shorter ◽  
Ding Zhang ◽  
Joaquin Gabaldon ◽  
Jill D. Mellen ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Environmental Enrichment ◽  
Management Practices ◽  
Average Distance ◽  
Bottlenose Dolphins ◽  
Training Session ◽  
Habitat Characteristics ◽  
Activity Levels ◽  
Enrichment Programs ◽  
Management Factors

High-resolution non-invasive cetacean tagging systems can be used to investigate the influence of habitat characteristics and management factors on behavior by quantifying activity levels and distance traveled by bottlenose dolphins (Tursiops truncatus and Tursiops aduncus) in accredited zoos and aquariums. Movement Tags (MTags), a bio-logging device, were used to record a suite of kinematic and environmental information outside of formal training sessions as part of a larger study titled “Towards understanding the welfare of cetaceans in zoos and aquariums” (colloquially called the Cetacean Welfare Study). The purpose of the present study was to explore if and how habitat characteristics, environmental enrichment programs, and training programs were related to the distance traveled and energy expenditure of dolphins in accredited zoos and aquariums. Bottlenose dolphins in accredited zoos and aquariums wore MTags one day per week for two five-week data collection periods. Overall dynamic body acceleration (ODBA), a proxy for energy expenditure, and average distance traveled per hour (ADT) of 60 dolphins in 31 habitats were examined in relation to demographic, habitat, and management factors. Participating facilities were accredited by the Alliance for Marine Mammal Parks and/or Aquariums and the Association of Zoos & Aquariums. Two factors were found to be related to ADT while six factors were associated with ODBA. The results showed that enrichment programs were strongly related to both ODBA and ADT. Scheduling predictable training session times was also positively associated with ADT. The findings suggested that habitat characteristics had a relatively weak association with ODBA and were not related to ADT. In combination, the results suggested that management practices were more strongly related to activity levels than habitat characteristics.

scholarly journals Total energy expenditure of bottlenose dolphins (Tursiops truncatus) of different ages

2021 ◽  
Author(s):  
Rebecca Rimbach ◽  
Ahmad Amireh ◽  
Austin Allen ◽  
Brian Hare ◽  
Emily Guarino ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Total Energy ◽  
Body Mass ◽  
Tursiops Truncatus ◽  
Marine Mammals ◽  
Bottlenose Dolphins ◽  
Large Body ◽  
Total Energy Expenditure ◽  
Natural Seawater ◽  
Terrestrial Mammals

Marine mammals are thought to have an energetically expensive lifestyle because endothermy is costly in marine environments. However, measurements of total energy expenditure (TEE; kcal/day) are available only for a limited number of marine mammals, because large body size and inaccessible habitats make TEE measurements expensive and difficult for many taxa. We measured TEE in 10 adult common bottlenose dolphins (Tursiops truncatus) living in natural seawater lagoons at two facilities (Dolphin Research Center and Dolphin Quest) using the doubly labeled water method. We assessed the relative effects of body mass, age, and physical activity on TEE. We also examined whether TEE of bottlenose dolphins, and more generally marine mammals, differs from that expected for their body mass compared to other eutherian mammals, using phylogenetic least squares (PGLS) regressions. There were no differences in body mass or TEE (unadjusted TEE and TEE adjusted for fat free mass (FFM)) between dolphins from both facilities. Our results show that Adjusted TEE decreased and fat mass (FM) increased with age. Different measures of activity were not related to age, body fat or Adjusted TEE. Both PGLS and the non-phylogenetic linear regression indicate that marine mammals have an elevated TEE compared to terrestrial mammals. However, bottlenose dolphins expended 17.1% less energy than other marine mammals of similar body mass. The two oldest dolphins (>40 years) showed a lower TEE, similar to the decline in TEE seen in older humans. To our knowledge, this is the first study to show an age-related metabolic decline in a large non-human mammal.

scholarly journals Heterogeneity of myoglobin distribution in the locomotory muscles of five cetacean species

2001 ◽  
Vol 204 (2) ◽  
pp. 209-215 ◽  
Author(s):  
L.K. Polasek ◽  
R.W. Davis
Keyword(s):  
Marine Mammals ◽  
Killer Whale ◽  
Bottlenose Dolphins ◽  
Spectrophotometric Analysis ◽  
Storage Site ◽  
Cetacean Species ◽  
Striped Dolphin ◽  
Contour Maps ◽  
False Killer Whale ◽  
Deep Water Species

Myoglobin is an important storage site for oxygen in the swimming muscles of diving marine mammals. However, little is known about its distribution within muscles since previous studies have relied on single samples. The goal of this study was to determine the distribution of myoglobin within the swimming muscles of five species of cetacean: dusky dolphin, false killer whale, striped dolphin, humpbacked dolphin and bottlenose dolphin. The entire dorsal (epaxial) and ventral (hypaxial) swimming muscles were removed from each animal and weighed. Transverse sections were taken from the cranial, middle and caudal regions of each muscle and sampled along a circular grid with a minimum of 30 sites per section. Spectrophotometric analysis was used to measure the myoglobin concentration of each sample. Contour maps of myoglobin concentration were made for each transverse section. Myoglobin concentration was found to be non-uniformly distributed within the muscle. The interior of the muscle lying closest to the vertebrae showed a significantly higher (11 %) mean myoglobin concentration than the exterior of the muscle for all five species. In the epaxial muscles, the mean myoglobin concentration was significantly higher in the caudal region closest to the flukes. The two deep-water species (false killer whale and striped dolphin) had significantly higher myoglobin concentrations than the three species (dusky, humpbacked and bottlenose dolphins) that occur in shallow, coastal waters. These results show that myoglobin is not homogeneously distributed in the locomotory muscle of cetaceans and that levels may be highest in those areas that produce greater force and consume more oxygen during aerobic swimming. Enhancing oxygen stores in those areas of the muscle that work the hardest would theoretically lengthen the aerobic dive limit of the animal during submerged swimming.

scholarly journals Early-life behaviour predicts first-year survival in a long-distance avian migrant

2021 ◽  
Vol 288 (1942) ◽  
pp. 20202670
Author(s):  
Shay Rotics ◽  
Sondra Turjeman ◽  
Michael Kaatz ◽  
Damaris Zurell ◽  
Martin Wikelski ◽  
...  
Keyword(s):  
Early Life ◽  
Daily Activity ◽  
Survival Rates ◽  
Activity Level ◽  
First Year ◽  
Activity Levels ◽  
Long Distance ◽  
Body Acceleration ◽  
In The Wild ◽  
Migratory Experience

Early-life conditions have critical, long-lasting effects on the fate of individuals, yet early-life activity has rarely been linked to subsequent survival of animals in the wild. Using high-resolution GPS and body-acceleration data of 93 juvenile white storks ( Ciconia ciconia ), we examined the links between behaviour during both pre-fledging and post-fledging (fledging-to-migration) periods and subsequent first-year survival. Juvenile daily activity (based on overall dynamic body acceleration) showed repeatable between-individual variation, the juveniles' pre- and post-fledging activity levels were correlated and both were positively associated with subsequent survival. Daily activity increased gradually throughout the post-fledging period, and the relationship between post-fledging activity and survival was stronger in individuals who increased their daily activity level faster (an interaction effect). We suggest that high activity profiles signified individuals with increased pre-migratory experience, higher individual quality and perhaps more proactive personality, which could underlie their superior survival rates. The duration of individuals’ fledging-to-migration periods had a hump-shaped relationship with survival: higher survival was associated with intermediate rather than short or long durations. Short durations reflect lower pre-migratory experience, whereas very long ones were associated with slower increases in daily activity level which possibly reflects slow behavioural development. In accordance with previous studies, heavier nestlings and those that hatched and migrated earlier had increased survival. Using extensive tracking data, our study exposed new links between early-life attributes and survival, suggesting that early activity profiles in migrating birds can explain variation in first-year survival.

scholarly journals Determinants of climbing energetic costs in humans

2021 ◽  
Author(s):  
Elaine E. Kozma ◽  
Herman Pontzer
Keyword(s):  
Body Size ◽  
Energy Expenditure ◽  
Body Mass ◽  
Anatomical Variation ◽  
Negligible Effect ◽  
Energetic Cost ◽  
Energetic Costs ◽  
Cost Of Transport ◽  
Specific Cost ◽  
Limb Proportions

Previous studies in primates and other animals have shown that mass specific cost of transport (J kg−1 m−1) for climbing is independent of body size across species, but little is known about within-species allometry of climbing costs or the effects of difficulty and velocity. Here, we assess the effects of velocity, route difficulty, and anatomical variation on the energetic cost of climbing within humans. Twelve experienced rock climbers climbed on an indoor wall over a range of difficulty levels and velocities, with energy expenditure measured via respirometry. We found no effect of body mass or limb proportions on mass-specific cost of transport among subjects. Mass-specific cost of transport was negatively correlated with climbing velocity. Increased route difficulty was associated with slower climbing velocities and thus higher costs, but there was no statistically significant effect of route difficulty on energy expenditure independent of velocity. Finally, human climbing costs measured in this study were similar to published values for other primates, suggesting arboreal adaptations have a negligible effect on climbing efficiency.

scholarly journals Secular trends in under-reporting in young people

2005 ◽  
Vol 93 (2) ◽  
pp. 241-247 ◽  
Author(s):  
K. L. Rennie ◽  
S. A. Jebb ◽  
A. Wright ◽  
W. A. Coward
Keyword(s):  
Young People ◽  
Energy Expenditure ◽  
Energy Intake ◽  
Activity Level ◽  
Energy Requirements ◽  
Activity Levels ◽  
Nutrition Survey ◽  
Energy Needs ◽  
Dietary Records ◽  
Prevalence Of Obesity

National survey data show that reported energy intake has decreased in recent decades despite a rise in the prevalence of obesity. This disparity may be due to a secular increase in under-reporting or a quantitatively greater decrease in energy expenditure. This study examines the extent of under-reporting of energy intake in the National Diet and Nutrition Survey (NDNS) in young people aged 4–18 years in 1997 using published equations to calculate estimated energy requirements. It explores secular changes by comparison with the Diets of British School Children (DBSC) survey in 10–11- and 14–15-year-olds in 1983. In the NDNS, under-reporting (estimated energy requirements – energy intake) represented 21 % of energy needs in girls and 20 % in boys. The magnitude of under-reporting increased significantly with age (P<0·001) and was higher in overweight than lean individuals over 7 years of age. To compare reported energy intake in DBSC and NDNS, the estimated physical activity level from dietary records (dPAL=reported energy intake/predicted BMR) was calculated. If there were no under-reporting, dPAL would represent the subject's true activity level. However, dPAL from the NDNS was significantly lower than that from the DBSC by 8 % and 9 % in boys and girls for those aged 10–11 years, and by 14 % and 11 % for 14–15-year-olds respectively, reaching physiologically implausible levels in the 14–15-year-old girls (dPAL=1·17). If activity levels have remained constant between the two surveys, under-reporting has increased by 8–14 %. The evidence supports a secular trend towards increased under-reporting between the two surveys, but the precise magnitude cannot be quantified in the absence of historical measures of energy expenditure.

scholarly journals Physical Activity Level and Energy Expenditure of Clinical Physiotherapists and Physiotherapy Educators in Selected Tertiary Health and Educational Institutions in South-West Nigeria

2019 ◽  
Vol 13 (2) ◽  
pp. 1-9
Author(s):  
AYODEJI A. Fabunmi
Keyword(s):  
Physical Activity ◽  
Energy Expenditure ◽  
Physical Activity Level ◽  
Negative Relationship ◽  
Activity Level ◽  
Activity Levels ◽  
Pearson Product Moment Correlation ◽  
Significant Difference ◽  
Physical Activity Levels ◽  
The Mean

Background: Physiotherapists are trained in the use of physical activity for health promotion, and therefore are expected to be physically active themselves. Aim of the Study: This study determined the physical activity level and energy expenditure of clinical physiotherapists and physiotherapy educators. Materials and Methods: The research design is cross-sectional survey. Sixty participants were selected using the consecutive sampling technique. A pedometer (Omron) was used to measure the number of steps taken by the participants, the distance covered, and the overall energy expenditure. The number of steps was used to classify the participants’ physical activity levels. The data obtained were analysed using descriptive statistics and frequency, percentages and chi-square inferential statistics, Pearson product-moment correlation, Spearman’s rank correlation, independent t-tests and Mann-Whitney U tests. The alpha level was set at 0.05. Results: The mean age and BMI of all participants were 36.81±7.86 years and 26.16±4.46kg/m2 respectively. The average number of steps taken per day was 8002±3411 and the mean energy expenditure was 248.26±182.92kcal. This study revealed that 21.3% of the participants were sedentary, 27.7% were ‘low active’, 27.7% were moderately active, 10.6% were active and 12.8% were highly active. The Pearson product-moment correlation coefficient showed a significant negative relationship between the number of steps and age (r = -0.292 p= 0.047) and a significant positive relationship between the number of steps and energy expenditure (r = 0.325; p = 0.026), respectively. There was a significant inverse relationship between the number of steps, the energy expenditure and the age of the participants. There was no significant difference in the number of steps per day, PAL and energy expenditure between clinical physiotherapists and physiotherapy educators. Conclusion: Physiotherapists should improve their physical activity levels, as most of them (76.7%) were classified in the low activity level category.

scholarly journals Behaviour, temperature and terrain slope impact estimates of energy expenditure using oxygen and dynamic body acceleration

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Eleanor R. Dickinson ◽  
Philip A. Stephens ◽  
Nikki J. Marks ◽  
Rory P. Wilson ◽  
David M. Scantlebury
Keyword(s):  
Energy Expenditure ◽  
Ambient Temperature ◽  
Capra Hircus ◽  
Energetic Costs ◽  
Extrinsic Factors ◽  
Rest Energy ◽  
Body Acceleration ◽  
Energy Expenditures ◽  
Terrain Slope ◽  
Free Ranging

AbstractThe energy used by animals is influenced by intrinsic (e.g. physiological) and extrinsic (e.g. environmental) factors. Accelerometers within biologging devices have proven useful for assessing energy expenditures and their behavioural context in free-ranging animals. However, certain assumptions are frequently made when acceleration is used as a proxy for energy expenditure, with factors, such as environmental variation (e.g. ambient temperature or slope of terrain), seldom accounted for. To determine the possible interactions between behaviour, energy expenditure and the environment (ambient temperature and terrain slope), the rate of oxygen consumption ($${\dot{\text{V}}\text{O}}_{2}$$ V ˙ O 2 ) was measured in pygmy goats (Capra hircus aegarus) using open-flow indirect calorimetry. The effect of temperature (9.7–31.5 °C) on resting energy expenditure was measured. The relationship between $${\dot{\text{V}}\text{O}}_{2}$$ V ˙ O 2 and dynamic body acceleration (DBA) was measured at different walking speeds (0.8–3.0 km h−1) and on different inclines (0, + 15°, − 15°). The daily behaviour of individuals was measured in two enclosures: enclosure A (level terrain during summer) and enclosure B (sloped terrain during winter) and per diem energy expenditures of behaviours estimated using behaviour, DBA, temperature, terrain slope and $${\dot{\text{V}}\text{O}}_{2}$$ V ˙ O 2 . During rest, energy expenditure increased below 22 °C and above 30.5 °C. $${\dot{\text{V}}\text{O}}_{2}$$ V ˙ O 2 (ml min−1) increased with DBA when walking on the level. Walking uphill (+ 15°) increased energetic costs three-fold, whereas walking downhill (− 15°) increased energetic costs by one third. Based on these results, although activity levels were higher in animals in enclosure A during summer, energy expenditure was found to be significantly higher in the sloped enclosure B in winter (means of enclosures A and B: 485.3 ± 103.6 kJ day−1 and 744.5 ± 132.4 kJ day−1). We show that it is essential to account for extrinsic factors when calculating animal energy budgets. Our estimates of the impacts of extrinsic factors should be applicable to other free ranging ungulates.

scholarly journals The impact of the Luton social prescribing programme on energy expenditure: a quantitative before-and-after study

BMJ Open ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. e026862
Author(s):  
Julia Vera Pescheny ◽  
Laura H Gunn ◽  
Gurch Randhawa ◽  
Yannis Pappas
Keyword(s):  
Physical Activity ◽  
Energy Expenditure ◽  
Activity Level ◽  
Service Users ◽  
Activity Levels ◽  
Post Intervention ◽  
Social Prescribing ◽  
Physical Activity Levels ◽  
Before And After ◽  
Negative Effect

ObjectivesThe objective of this study was to assess the change in energy expenditure levels of service users after participation in the Luton social prescribing programme.DesignUncontrolled before-and-after study.SettingThis study was set in the East of England (Luton).ParticipantsService users with complete covariate information and baseline measurements (n=146) were included in the analysis.InterventionSocial prescribing, which is an initiative that aims to link patients in primary care with sources of support within the community sector to improve their health, well-being and care experience. Service users were referred to 12 sessions (free of charge), usually provided by third sector organisations.Primary outcome measureEnergy expenditure measured as metabolic equivalent (MET) minutes per week.ResultsUsing a Bayesian zero-inflated negative binomial model to account for a large number of observed zeros in the data, 95% posterior intervals show that energy expenditure from all levels of physical activities increased post intervention (walking 41.7% (40.31%, 43.11%); moderate 5.0% (2.94%, 7.09%); vigorous 107.3% (98.19%, 116.20%) and total 56.3% (54.77%, 57.69%)). The probability of engaging in physical activity post intervention increased, in three of four MET physical activity levels, for those individuals who were inactive at the start of the programme. Age has a negative effect on energy expenditure from any physical activity level. Similarly, working status has a negative effect on energy expenditure in all but one MET physical activity level. No consistent pattern was observed across physical activity levels in the association between gender and energy expenditure.ConclusionThis study shows that social prescribing may have the potential to increase the physical activity levels of service users and promote the uptake of physical activity in inactive patient groups. Results of this study can inform future research in the field, which could be of use for commissioners and policy makers.

Comparison of doubly labeled water with respirometry at low- and high-activity levels

1988 ◽  
Vol 65 (1) ◽  
pp. 53-56 ◽  
Author(s):  
K. R. Westerterp ◽  
F. Brouns ◽  
W. H. Saris ◽  
F. ten Hoor
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
High Activity ◽  
Bicycle Ergometer ◽  
Activity Level ◽  
Level Energy ◽  
Activity Levels ◽  
Doubly Labeled Water ◽  
Energy Expenditures ◽  
Doubly Labeled Water Method

In previous studies the doubly labeled water method for measuring energy expenditure in free-living humans has been validated against respirometry under sedentary conditions. In the present investigation, energy expenditure is measured simultaneously with doubly labeled water and respirometry at low- and high-activity levels. Over 6 days, five subjects were measured doing mainly sedentary activities like desk work; their average daily metabolic rate was 1.40 +/- 0.09 (SD) times sleeping metabolic rate. Four subjects were measured twice over 3.5 days, including 2 days with heavy bicycle ergometer work, resulting in an average daily metabolic rate of 2.61 +/- 0.25 (SD) times sleeping metabolic rate. At the low-activity level, energy expenditures from the doubly labeled water method were on the average 1.4 +/- 3.9% (SD) larger than those from respirometry. At the high-activity level, the doubly labeled water method yielded values that were 1.0 +/- 7.0% (SD) lower than those from respirometry. Results demonstrate the utility of the doubly labeled water method for the determination of energy expenditure in the range of activity levels in daily life.

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