Life Lines by Dr. Dolittle

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Tag Archive for ‘diet’

Q&A with Anthony J. Basile: Please do not feed the birds? – Effects of an urban diet on mourning doves

We are delighted to share this interview with Evolutionary Biology PhD Candidate, Anthony Basile, MS, NDTR, who is working with Dr. Karen Sweazea at Arizona State University. We asked Anthony about his research that he presented at the 2021 Experimental Biology conference. What made you interested in studying the effects of urbanization on doves? I’m sure everyone reading this has seen a bird walking around with bread or French fries […]

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Surviving the cold

The ability to regulate body temperature is critical for animals. This is especially true for small mammals as they have a larger surface area resulting in more heat loss to the environment than larger animals. Animals that stay active during the winter likewise have to spend more energy to stay warm. To do this well, they need to balance heat loss with heat generation through shivering as well as non-shivering […]

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New research working towards preventing and treating necrotizing enterocolitis in premature babies

Necrotizing enterocolitis is an inflammatory disease of the intestines. New research suggests that premature babies are at risk of necrotizing enterocolitis in part because they have low levels of arachidonic and docosahexanoic acids in their gut, which regulate inflammation. Doctors routinely administer nutritional supplements to premature babies via an intravenous (i.v.) route until the gastrointestinal tract develops and the babies are able to process oral foods. This parenteral nutrition helps […]

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How exercise training and diet may impact exercise performance

Both diet and exercise training are associated with muscle performance and endurance. Migratory birds undergo intense endurance exercise. In fact, a recent review indicated that flapping flight costs more energy (9 x increase from basal metabolic rate) than required by elite athletes competing in the Tour de France (4.3 x increase from basal metabolic rate) (Butler, 2016). Unlike running animals, migratory birds fuel endurance exercise with fats as opposed to […]

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Extreme Fasting

While giant pandas roll in horse manure to stay warm in the winter (that’s a different story), other animals spend up to 8 months hibernating to conserve energy during times of reduced food availability and freezing temperatures. During their long winter’s nap, animals such as the Arctic ground squirrel and 13-lined ground squirrel go without food or water while at the same time avoiding muscle wasting – a rather impressive […]

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Role of phoenixin-20 in regulating appetite and glucose metabolism

Phoenixin-20 is a small peptide that has been detected in mammals, birds, amphibians and fish. Studies have shown that it can modify reproductive processes in female mammals and fish. In addition, it has been shown in mammalian studies to act as a pain reducer and modulator of food intake. In a new study published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology, researchers explored whether phoenixin-20 has […]

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Seagulls pick up on human cues to find food

Have you ever experienced seagulls seemingly begging for food from you? It is not your imagination. A new study finds that seagulls really do prefer foods that have been handled by humans. The study conducted Madeleine Goumas (University of Exeter, UK) examined whether seagulls picked up on cues from humans or were simply looking for food. While standing about 8 meters away from herring gulls, the team placed two plastic-wrapped […]

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Developing Pacific molluscs produce their own carbohydrates

Animals that develop within an egg, must rely on the egg yolk for nutrition for healthy development. While we have known that proteins and fats in the egg are important for development, the role of carbohydrates in the development of molluscs is a bit vague. A new study published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology examined the role of carbohydrates in the development of Pacific […]

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Why pigs and people absorb more sugar from their diet than fish

Researchers at the University of Saskatchewan in Canada compared how pigs and fish absorb glucose (i.e. sugar) from the diet. They did this by measuring how well glucose moves across the intestinal wall. Their findings appear in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology.  Transport of dietary glucose from the gut to the blood is facilitated by glucose transporters that pick up glucose and move it […]

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Importance of feeding chicks shortly after hatching

While egg yolks are rich in lipids, chicks consume mainly carbohydrates after hatching. This ability to switch between using nutrients provided by the mother in the egg and those the chick must acquire from the environment is important for the normal growth and metabolism of the birds after hatching. Delayed access to foods after hatching can therefore have long term effects on the animals. Transport of animals from hatcheries to […]

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