Preprints
Filtering by Subject: Physiology
Aerobic scope protection reduces ectotherm growth under warming
Published: 2020-01-24
Subjects: Animal Sciences, Comparative and Evolutionary Physiology, Life Sciences, Physiology, Zoology
Temperature has a dramatic effect on the physiology of ectothermic animals, impacting most of their biology. When temperatures increase above optimal for an animal, their growth gradually decreases. The main mechanism behind this growth rate reduction is unknown. Here, we suggest the ‘aerobic scope protection’ hypothesis as a mechanistic explanation for the reduction in growth. After a meal, [...]
Quantifying the autonomic response to stressors – one way to expand the definition of "stress" in animals
Published: 2019-11-08
Subjects: Ecology and Evolutionary Biology, Endocrinology, Life Sciences, Physiology, Systems Biology
Quantifying the impact of changes or stimuli in the external and internal environment that are challenging (“stressors”) to whole organisms is difficult. To date, physiological ecologists and ecological physiologists have mostly used measures of glucocorticoids (GCs) to assess the impact of stressors on animals. This is of course too simplistic as Hans Seyle himself characterized the response of [...]
Endocrinology of thermoregulation in birds in a changing climate
Published: 2019-09-09
Subjects: Cellular and Molecular Physiology, Ecology and Evolutionary Biology, Endocrinology, Life Sciences, Physiology
The ability to maintain a (relatively) stable body temperature in a wide range of thermal environments is a unique feature of endotherms such as birds. Endothermy is acquired and regulated via various endocrine and molecular pathways, and ultimately allows wide aerial, aquatic, and terrestrial distribution in variable environments. However, due to our changing climate, birds are faced with [...]
The covariance between metabolic rate and behaviour varies across behaviours and thermal types: meta-analytic insights
Published: 2019-01-14
Subjects: Ecology and Evolutionary Biology, Life Sciences, Physiology
Energy metabolism has received much attention as a potential driver of repeatable among-individual differences in behaviour (animal personality). Several factors have been hypothesized to mediate this relationship. We performed a meta-analysis of >70 studies comprised of >8000 individuals reporting relationships between measures of maintenance metabolic rates (i.e., basal metabolic rate, [...]