A certain species of tick has learned the secret to staying slim--by remaining virgins. Female ticks who mate will drink 100 times their weight in host blood, whereas virgins arent so gluttonous says a University of Alberta researcher who has discovered a protein that may offer clues to a $10 billion global tick problem.
"What happens is that a female will remain attached to a host, eating slowly and waiting to be fertilized," said Dr. Reuben Kaufman from the U of As Faculty of Science. "If she does copulate, the seminal fluid contains an engorgement factor protein which acts as a signal to tell her to complete engorgement. Within 24 hours of copulation she will increase another 10 times her unfed weight."
Female ticks require six to 10 days to engorge fully. The feeding cycle consists of three phases: a preparatory phase when she attaches herself to the skin; a slow phase, during which the female feeds to 10 times her unfed weight and the third phase after copulation when the female increases her weight a further 10-fold. The virgin tick, however, rarely exceeds the critical weight necessary for laying some eggs.
Phoebe Dey | EurekAlert!
New technique for in-cell distance determination
19.03.2019 | Universität Konstanz
Dalian Coherent Light Source reveals hydroxyl super rotors from water photochemistry
19.03.2019 | Chinese Academy of Sciences Headquarters
The Potsdam Echelle Polarimetric and Spectroscopic Instrument (PEPSI) at the Large Binocular Telescope (LBT) in Arizona released its first image of the surface magnetic field of another star. In a paper in the European journal Astronomy & Astrophysics, the PEPSI team presents a Zeeman- Doppler-Image of the surface of the magnetically active star II Pegasi.
A special technique allows astronomers to resolve the surfaces of faraway stars. Those are otherwise only seen as point sources, even in the largest telescopes...
Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters.
"This source of radiation lets us look at reality through a new angle - it is like twisting a mirror and discovering something completely different," says...
New research group at the University of Jena combines theory and experiment to demonstrate for the first time certain physical processes in a quantum vacuum
For most people, a vacuum is an empty space. Quantum physics, on the other hand, assumes that even in this lowest-energy state, particles and antiparticles...
Physicists in the EPic Lab at University of Sussex make crucial development in global race to develop a portable atomic clock
Scientists in the Emergent Photonics Lab (EPic Lab) at the University of Sussex have made a breakthrough to a crucial element of an atomic clock - devices...
Every year earthquakes worldwide claim hundreds or even thousands of lives. Forewarning allows people to head for safety and a matter of seconds could spell...
11.03.2019 | Event News
01.03.2019 | Event News
28.02.2019 | Event News
19.03.2019 | Physics and Astronomy
19.03.2019 | Life Sciences
19.03.2019 | Physics and Astronomy