Lewis G. Halsey
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View article: Saying ‘no’ with confidence: statistical approaches to test for the absence of an effect
Saying ‘no’ with confidence: statistical approaches to test for the absence of an effect Open
Publishing non-significant findings is essential for the progress of science. However, many of us forget that ‘absence of evidence is not evidence of absence’ and believe that a statistically non-significant result is evidence of no effect…
View article: From metabolism to coexistence: Understanding animal movement and community dynamics through energy
From metabolism to coexistence: Understanding animal movement and community dynamics through energy Open
To counteract ongoing biodiversity loss due to global change, we need a deeper understanding of when and how species coexist. Recent work has begun to uncover mechanistic links between species coexistence and the movement of individual ani…
View article: Pigeons in a flock go cheap: a re-evaluation of the energetics of flying in cluster flocks
Pigeons in a flock go cheap: a re-evaluation of the energetics of flying in cluster flocks Open
The energy expended by animals during locomotion is often of considerable ecological importance. However, inaccurate conclusions about energy expenditure may arise if the limitations of the proxy variables being used to infer locomotion co…
View article: High environmental temperatures put nest excavation by ants on fast forward: they dig the same nests, faster
High environmental temperatures put nest excavation by ants on fast forward: they dig the same nests, faster Open
Environmental temperature influences the physiology and the behaviour of ectothermic organisms, including ants. However, the complex collective behaviour exhibited by ant colonies means that it is difficult to predict how the effects of te…
View article: From metabolism to coexistence: Understanding animal movement and community dynamics through energy
From metabolism to coexistence: Understanding animal movement and community dynamics through energy Open
Recent advances in the field of movement ecology have revealed intricate links between the movement of individual animals and the biodiversity of ecosystems. Hence, to advance our understanding of biodiversity and its ongoing loss due to g…
View article: Does greater variation reside in the larger sex?
Does greater variation reside in the larger sex? Open
The question of whether males or females are the more variable sex is long-standing, and yet to be fully answered. We investigate the relationships between body mass and variation across species using a phylogenetically informed analysis o…
View article: Flying fast improves aerodynamic economy of heavier birds
Flying fast improves aerodynamic economy of heavier birds Open
A paradox of avian long-distance migrations is that birds must greatly increase their body mass prior to departure, yet this is presumed to substantially increase their energy cost of flight. However, here we show that when homing pigeons …
View article: Low resting metabolic rate and increased hunger due to β-MSH and β-endorphin deletion in a canine model
Low resting metabolic rate and increased hunger due to β-MSH and β-endorphin deletion in a canine model Open
Mutations that perturb leptin-melanocortin signaling are known to cause hyperphagia and obesity, but energy expenditure has not been well studied outside rodents. We report on a common canine mutation in pro-opiomelanocortin ( POMC ), whic…
View article: Variability in variability: does variation in morphological and physiological traits differ between men and women?
Variability in variability: does variation in morphological and physiological traits differ between men and women? Open
Many researchers presume greater variability between female participants than between males due to the menstrual cycle. This view has encouraged a sex bias in health and medical research, resulting in considerable knowledge gaps with impor…
View article: Greater male variability in daily energy expenditure develops through puberty
Greater male variability in daily energy expenditure develops through puberty Open
There is considerably greater variation in metabolic rates between men than between women, in terms of basal, activity and total (daily) energy expenditure (EE). One possible explanation is that EE is associated with male sexual characteri…
View article: Does eating less or exercising more to reduce energy availability produce distinct metabolic responses?
Does eating less or exercising more to reduce energy availability produce distinct metabolic responses? Open
When less energy is available to consume, people often lose weight, which reduces their overall metabolic rate. Their cellular metabolic rate may also decrease (metabolic adaptation), possibly reflected in physiological and/or endocrinolog…
View article: Allometric scaling of metabolic rate and cardiorespiratory variables in aquatic and terrestrial mammals
Allometric scaling of metabolic rate and cardiorespiratory variables in aquatic and terrestrial mammals Open
While basal metabolic rate (BMR) scales proportionally with body mass ( M b ), it remains unclear whether the relationship differs between mammals from aquatic and terrestrial habitats. We hypothesized that differences in BMR allometry wou…
View article: Total daily energy expenditure has declined over the past three decades due to declining basal expenditure, not reduced activity expenditure
Total daily energy expenditure has declined over the past three decades due to declining basal expenditure, not reduced activity expenditure Open
View article: Solving the conundrum of intra‐specific variation in metabolic rate: A multidisciplinary conceptual and methodological toolkit
Solving the conundrum of intra‐specific variation in metabolic rate: A multidisciplinary conceptual and methodological toolkit Open
Researchers from diverse disciplines, including organismal and cellular physiology, sports science, human nutrition, evolution and ecology, have sought to understand the causes and consequences of the surprising variation in metabolic rate…
View article: Corrigendum to “Quantifying annual spatial consistency in chick-rearing seabirds to inform important site identification” [Biol. Conserv. 281 (2023) 109994]
Corrigendum to “Quantifying annual spatial consistency in chick-rearing seabirds to inform important site identification” [Biol. Conserv. 281 (2023) 109994] Open
View article: Quantifying annual spatial consistency in chick-rearing seabirds to inform important site identification
Quantifying annual spatial consistency in chick-rearing seabirds to inform important site identification Open
View article: Does aerobic scope influence geographical distribution of teleost fishes?
Does aerobic scope influence geographical distribution of teleost fishes? Open
Many abiotic and biotic factors are known to shape species' distributions, but we lack understanding of how innate physiological traits, such as aerobic scope (AS), may influence the latitudinal range of species. Based on theoretical assum…
View article: Variation in human water turnover associated with environmental and lifestyle factors
Variation in human water turnover associated with environmental and lifestyle factors Open
Water is essential for survival, but one in three individuals worldwide (2.2 billion people) lacks access to safe drinking water. Water intake requirements largely reflect water turnover (WT), the water used by the body each day. We invest…
View article: The metabolic upper critical temperature of the human thermoneutral zone
The metabolic upper critical temperature of the human thermoneutral zone Open
We offer suggestions for future studies that should clarify the presence/absence of an upper limit to the TNZ and if present, where it lies.
View article: Variability in energy expenditure is much greater in males than females
Variability in energy expenditure is much greater in males than females Open
In mammals, trait variation is often reported to be greater among males than females. However, to date, mainly only morphological traits have been studied. Energy expenditure represents the metabolic costs of multiple physical, physiologic…
View article: Can metrics of acceleration provide accurate estimates of energy costs of locomotion on uneven terrain? Using domestic sheep (Ovis aries) as an example
Can metrics of acceleration provide accurate estimates of energy costs of locomotion on uneven terrain? Using domestic sheep (Ovis aries) as an example Open
Background Locomotion is often a necessity for animal survival and can account for a large proportion of an individual’s energy budget. Therefore, determining the energy costs of locomotion is an important part of understanding the interac…
View article: Saving the sea turtles of Anguilla: Combining scientific data with community perspectives to inform policy decisions
Saving the sea turtles of Anguilla: Combining scientific data with community perspectives to inform policy decisions Open
Historic over-exploitation and the more recent threats caused by fisheries by-catch, disease and climate change have left sea turtle populations in the Wider Caribbean at risk of extinction. In 1995, following regional declines in nesting …
View article: Energy compensation and adiposity in humans
Energy compensation and adiposity in humans Open
View article: The Mystery of Energy Compensation
The Mystery of Energy Compensation Open
The received wisdom on how activity affects energy expenditure is that the more activity is undertaken, the more calories will have been burned by the end of the day. Yet traditional hunter-gatherers, who lead physically hard lives, burn n…
View article: The cardio‐respiratory effects of passive heating and the human thermoneutral zone
The cardio‐respiratory effects of passive heating and the human thermoneutral zone Open
The thermoneutral zone (TNZ) defines the range of ambient temperatures at which resting metabolic rate (MR) is at a minimum. While the TNZ lower limit has been characterized, it is still unclear whether there is an upper limit, that is, be…
View article: Endothermy makes fishes faster but does not expand their thermal niche
Endothermy makes fishes faster but does not expand their thermal niche Open
Regional endothermy has evolved several times in marine fishes, and two competing hypotheses are generally proposed to explain the evolutionary drivers behind this trait: thermal niche expansion and elevated cruising speeds. Evidence to su…
View article: Peer Review #1 of "Food insecurity increases energetic efficiency, not food consumption: an exploratory study in European starlings (v0.1)"
Peer Review #1 of "Food insecurity increases energetic efficiency, not food consumption: an exploratory study in European starlings (v0.1)" Open
Food insecurity-defined as limited or unpredictable access to nutritionally adequate food-is associated with higher body mass in humans and birds.It is widely assumed that food insecurity-induced fattening is caused by increased food consu…
View article: Peer Review #1 of "Food insecurity increases energetic efficiency, not food consumption: an exploratory study in European starlings (v0.2)"
Peer Review #1 of "Food insecurity increases energetic efficiency, not food consumption: an exploratory study in European starlings (v0.2)" Open
Food insecurity-defined as limited or unpredictable access to nutritionally adequate food-is associated with higher body mass in humans and birds.It is widely assumed that food insecurity-induced fattening is caused by increased food consu…
View article: Linking foraging and breeding strategies in tropical seabirds
Linking foraging and breeding strategies in tropical seabirds Open
The archetypal foraging behaviour of tropical seabirds is generally accepted to differ from that of their temperate and polar breeding counterparts, with the former exhibiting less predictable foraging behaviour associated with the less pr…
View article: Author response for "Linking foraging and breeding strategies in tropical seabirds"
Author response for "Linking foraging and breeding strategies in tropical seabirds" Open