Most animals experience fluctuations in temperature during development, but studies of energetics have ignored the potential influence of these thermal fluctuations. We measured the energetics of Sceloporus undulatus lizard embryos under two conditions that differ realistically in the mean and variance of temperature (diel cycles of 20 degrees -30 degrees and 20 degrees -34 degrees C). Our goal...

The split incentive problem concerns the lack of appropriate incentives to implement energy efficiency measures. In particular, low income tenants face a phenomenon of energy poverty in which they allocate significantly more of their household income to energy expenditures than other renters. This problem is substantial, affecting 1.89% of all United States' energy use. If effectively addressed...

Although numerous experimental data indicate that lactate is efficiently used for energy by the mature brain, the direct measurements of energy metabolism parameters during neuronal network activity in early postnatal development have not been performed. Therefore, the role of lactate in the energy metabolism of neurons at this age remains unclear. In this study, we monitored field potentials a...

I. The relationship between the heart rate and the energy expenditure of four sheep, S, S,, S, and S1, was studied under conditions known to increase energy metabolism. 2. A close relationship between heart rate and energy expenditure was shown to exist in three of the four sheep tested when energy expenditure was increased by cold exposure and by increased levels of food intake. 3. The source ...

Kleptoparasitic activities by Great Frigatebirds (Fregata minor) on Masked Boobies (Sula dactylatru) were quantified on Henderson Island in the South Pacific. The frequency of kleptoparasitic attacks increased towards dusk, the time when most Masked Boobies returned to the roost site. Masked Boobies returning to the roost low (i 30 m) over the water were significantly more likely to be chased t...

A study of orangutans' daily energy expenditure confirmed exceptionally slow metabolism. It suggests they evolved a lifestyle designed to minimize energy use. If so, shifting to a higher energy-use strategy may help explain how humans evolved.

Bacteria have evolved the ability to monitor changes in various physico-chemical parameters and to adapt their physiology and metabolism by implementing appropriate cellular responses to these changes. Energy taxis is a metabolism-dependent form of taxis and is the directed movement of motile bacteria in gradients of physico-chemical parameters that affect metabolism. Energy taxis has been desc...