Now showing items 1-10 of 110
Resistance to temperature extremes in sub-Antarctic weevils: Interspecific variation, population differentiation and acclimation
Much of the work on the responses of terrestrial arthropods to high and low temperatures has been done on model organisms such as Drosophila. However, considerable variation in thermotolerance is partitioned at the family ...
Phenotypic plasticity of gas exchange pattern and water loss in Scarabaeus spretus (Coleóptera: Scarabaeidae): Deconstructing the basis for metabolic rate variation
Investigation of gas exchange patterns and modulation of metabolism provide insight into metabolic control systems and evolution in diverse terrestrial environments. Variation in metabolic rate in response to environmental ...
Physiological diversity: Listening to the large-scale signal
[No abstract available]
Environmental physiology of three species of Collembola at Cape Hallett, North Victoria Land, Antarctica
The environmental physiology of three speciesof Collembola: Cryptopygus cisantarcticus, Isotoma klovstadi (Isotomidae) and Friesea grisea (Neanuridae) was investigated from November 2002 to February 2003 at Cape Hallett, ...
Oxygen limitation and thermal tolerance in two terrestrial arthropod species
Recent studies of marine invertebrates and fish have suggested that lower and upper critical temperatures (CTmin and CTmax) are coupled by a common mechanism: oxygen and capacity limitation of thermal tolerance (OCLT). ...
Phenotypic variance, plasticity and heritability estimates of critical thermal limits depend on methodological context
1. Biologists have long been concerned with measuring thermal performance curves and limits because of their significance to fitness. Basic experimental design may have a marked effect on the outcome of such measurements, ...
Testing the thermal melanism hypothesis: A macrophysiological approach
1. The thermal melanism hypothesis (TMH) predicts that dark (low skin reflectance) individuals are at an advantage in cool climates as they heat faster and reach higher equilibrium temperatures than lighter (higher ...
Allometric scaling of maximum metabolic rate: The influence of temperature
1. Maximum aerobic metabolic rate, measured in terms of rate of oxygen consumption during exercise (V̇O2max), is well known to scale to body mass (M) with an exponent greater than the value of 0.75 predicted by models based ...
Size- and temperature-independence of minimum life-supporting metabolic rates
1. Mass-specific metabolic rates of 173 animal species under various conditions of prolonged food deprivation (aestivation, hibernation, sit-and-wait existence) and/or living at temperatures near the freezing point of water ...
Scaling of insect metabolic rate is inconsistent with the nutrient supply network model
1. The nutrient supply network model of the metabolic theory of ecology predicts that metabolic rate scales as mass0.75 at all hierarchical levels. 2. An alternative, cell size, model suggests that the scaling of metabolic ...