Did you know that rodents and rabbits are not able to vomit? This was certainly news to me. So, I had to find out more… First, let’s talk about the difference between retching and vomiting. During retching (or dry heaves), the diaphragm and abdominal muscles contract, which helps increase pressure within the stomach (and prepare the contents for expulsion). Vomiting also involves contractions of the diaphragm, abdominal as well as […]
Tag Archive for ‘rat’
Dr. Charles Schaefer, a postdoctoral fellow working with Dr. Tobias Riede at Midwestern University presented research at the conference examining how rats use deep breaths to produce ultrasonic vocalizations. Similarly, researchers have studied a variety of vocalizations in rats that signify positive as well as negative emotions and how their brains process this information. Did you know rats enjoy being tickled?
Muscle wasting is a major complication associated with cirrhosis and liver failure. Normally the liver functions to convert ammonia into urea. But with liver failure, this process does not work well leading to high levels of circulating ammonia, which is thought to contribute to muscle wasting in mammals. A new study published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology, explored whether birds have the same muscle wasting […]
Victor Zhang (Graduate Student working with Dr. Loren Buck at Northern Arizona University) gave an interesting talk on his research to measure stress and activity patterns in free living arctic ground squirrels. They found overall that females were less stressed than males although stress levels and activity varied during lactation. I think some human mothers can agree with those observations. Oliver Wearing (Graduate student working with Dr. Graham Scott […]
A new species of giant tree rats (Uromys vika) has been confirmed in the Solomon Islands! These rats can reach over 2 pounds and an impressive 1.5 feet in length. They can even break through coconuts with their teeth. I would not want to cross paths with one of these critters. Sources: Video: YouTube TH Lavery, H Judge. A new species of giant rat (Muridae, Uromys) from Vangunu, Solomon Islands. […]
News out of Flagstaff, Arizona reports that a biotechnology company in the area, SenesTech, has developed a birth control for rats that was recently cleared by the Environmental Protection Agency. The new drug comes in the form of a sweetened liquid bait that has been shown to reduce rodent populations by as much as 40%. It works in female rats by inducing loss of eggs whereas in male rats it disrupts development of sperm. The drug is […]