Life Lines by Dr. Dolittle

Sponsored by the American Physiological Society

Tag Archive for ‘fasting’

Physiology of diving animals: how do they deal with hypoxia?

Dr. Jose Pablo Vazquez-Medina (pictured at right), a comparative physiologist at the University of California – Berkeley, was scheduled to present several ongoing studies from his lab at the Experimental Biology conference last month. Dr. Vazquez-Medina is a member of the Comparative and Evolutionary Physiology section of the American Physiological Society. Although the conference was cancelled due to Covid-19, Dr. Vazquez-Medina has agreed to share his research with us.   […]

Continue Reading →

Extreme fasting

  Northern Elephant seals (Mirounga angustirostris) are pretty extreme animals, at least when it comes to fasting. Pups nurse for about 1 month, during which time they greatly increase their body fat. After nursing, they typically fast for up to 3 months. A new study was designed to explore how their adipose (fat) tissue changes after this prolonged fast. Researchers at the University of California at Merced were able to […]

Continue Reading →

Hagfish 101: How to eat a whale from the inside out

The Dr. Dolittle award is given to outstanding graduate students or postdoctoral fellows who are conducting comparative physiology research that they are presenting at the annual Experimental Biology conference. Applicants for the award are asked to submit guest blog posts describing their research. I am very pleased to share this guest blog post from this year’s Dr. Dolittle travel award recipient, Alyssa Weinrauch. Alyssa presented her research today the Experimental […]

Continue Reading →

Health risks of being social

When I think of rainbow trout, the first image that comes to mind is usually something like this: In the wild, they look more like this: …not as appetizing, but a lot more fascinating.  When salmonid fish like rainbow trout are in environments with limited food or space, they form social hierarchies. In one study of limited food availability, Grobler et al., found that when they placed 4 rainbow trout […]

Continue Reading →

Fasting as a survival strategy in animals

Although female northern elephant seals only typically deliver one pup, females will sometimes nurse offspring from other mothers as in this photo by Brocken Inaglory via Wikimedia commons. A situation like this would result in less milk available to each nursing pup. I just read an interesting paper published in Physiology. Animals periodically undergo periods of food deprivation such as during hibernation, mating, molting and migration. During these period of […]

Continue Reading →

The seal of enigma!

I am excited to present this guest blog from Bridget Martinez, graduate student from the University of California, Merced. She has been studying elephant seals in the laboratory of Dr. Rudy Ortiz. She had presented her research at the 2015 Experimental Biology conference in Boston, MA which was mentioned in a prior blog . Here is her description of her research: Bridget Martinez, Graduate Student, University of California – Merced […]

Continue Reading →