"We found that gazelles had the lowest total evaporative water loss ever measured in an arid zone ungulate [hoofed animal]," write Stéphane Otrowski (National Wildlife Research Center, Saudi Arabia), Pascal Mésochina (National Wildlife Research Center, Saudi Arabia), and Joseph B. Williams (Ohio State University).
Sand gazelles' livers and hearts--which are important determinants of metabolic rate--decrease significantly in mass during four months of food and water restriction. Conversely, the gut walls, which are responsible in ruminants for 28–46% of whole-body protein synthesis, an energy demanding process, did not decrease significantly in mass. There are few sources of drinking water in the desert, so sand gazelles must rely on vegetation for both food and water requirements.
"The deserts of the Arabian Peninsula are among the most austere of terrestrial environments, with low, unpredictable rainfall, and high ambient temperature," explain the authors. "The sand gazelle has evolved a remarkable capacity to reduce its evaporative water losses, which is likely a component of their success."
Unexpectedly, the researchers also found that deprived sand gazelles had a higher fat content in the brain, revealing that gazelles may store fats in the brain to secure brain metabolism during prolonged food and water deprivation.
Since 1928, Physiological and Biochemical Zoology has presented original, current research in environmental, adaptational, and comparative physiology and biochemistry.
Suzanne Wu | EurekAlert!
Flow of cerebrospinal fluid regulates neural stem cell division
22.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt
Chemists at FAU successfully demonstrate imine hydrogenation with inexpensive main group metal
22.05.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
18.05.2018 | Power and Electrical Engineering
18.05.2018 | Information Technology
18.05.2018 | Information Technology