نتایج جستجو برای: thermoregulation
تعداد نتایج: 2757 فیلتر نتایج به سال:
Solar radiation is the major energy source for most living creatures, and some creatures change their skin colors responding to demands. Inspired by chameleons that live in desert of Namibia, which can regulate body temperature changing between black white, a patterned hydrogel film with self-thermoregulation ability reported this work. The consists two parts: light-responsive part stretchable ...
Insects thermoregulate using both canalized and plastic mechanisms. Populations of insects utilize these mechanisms to different extents, while it is posited that the degree thermal fluctuation a population experiences can determine optimal combination utilize, this still being elucidated. We used three populations generalist grasshopper, Melanoplus differentialis, from sites experiencing degre...
OBJECTIVE To critically assess original research addressing the effect of creatine supplementation on exercise heat tolerance and hydration status. DATA SOURCES We searched the electronic databases PubMed, Scopus, Web of Science, SPORTDiscus, and Rehabilitation & Physical Medicine, without date limitations, for the following key words: creatine, exercise, thermoregulation, dehydration, hypert...
Body temperature (T(b)) of rat pups (7-9 days old) raised under a 12:12-h light-dark (L-D) regimen (L: 0700-1900, D: 1900-0700) was consistently higher in D than in L by approximately 1.1 degrees C. We tested the hypothesis that the L-D differences in T(b) were accompanied by differences in the set point of thermoregulation. Measurements were performed on rat pups at 7-9 days after birth. O(2) ...
Behavioral thermoregulation, by basking in sunlight, is very common in acridids. The resulting increased body temperatures may be beneficial by accelerating feeding and developmental rates and by enhancing disease resistance. The absorption of solar energy is affected by the degree of cuticular melanization. In this paper, we quantify differences in color and thermoregulation between subarctic ...
This paper investigates the influence of seasonal adaptations to thermoregulatory heat loss for deer mice (Peromyscus) during summer and winter. A general, mechanistic model of heat transfer through fur was evaluated for the structural properties of the fur of deer mice. The model was validated against heat production determined from mice exposed to a range of radiative (wall) temperatures (tr)...
A major focus in the study of endothermic thermoregulation has been the description of thermoregulatory patterns used by various species and/or populations. Compared with ectotherms, relatively few attempts have been made to study the thermoregulation of endotherms in an adaptive framework. We believe that one of the main factors limiting this area of research has been the lack of an appropriat...
As climate change increases maximal water temperatures, behavioural thermoregulation may be crucial for the persistence of coldwater fishes, such as salmonids. Although myriad studies have documented behavioural thermoregulation in southern populations of salmonids, few if any have explored this phenomenon in northern populations, which are less likely to have an evolutionary history of heat st...
The function of the exaggerated structures that adorn many fossil vertebrates remains largely unresolved. One recurrent hypothesis is that these elaborated traits had a role in thermoregulation. This orthodoxy persists despite the observation that traits exaggerated to the point of impracticality in extant organisms are almost invariably sexually selected. We use allometric scaling to investiga...
Historically, egg-bound reptile embryos were thought to passively thermoconform to the nest environment. However, recent observations of thermal taxis by embryos of multiple reptile species have led to the widely discussed hypothesis that embryos behaviorally thermoregulate. Because temperature affects development, such thermoregulation could allow embryos to control their fate far more than hi...
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