Life Lines by Dr. Dolittle

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Tag Archive for ‘metabolic rate’

Q&A with Dr. Jon Harrison, Meredith Johnson, and Jordan Glass

We recently interviewed¬†Meredith Johnson¬†(graduate student), Jordan Glass (graduate student), and Dr. Jon Harrison from the School of Life Sciences at Arizona State University about the research they presented at the 2021 annual Experimental Biology conference. ¬† Q: You mentioned in one of your presentations that insects have an ‘unusual’ respiratory system. Can you explain how it differs from mammals?  Dr. Harrison: Insects exchange gases through blind-ended air-filled tubes called tracheae. There […]

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Longevity of dogs

Dogs are weird when it comes to predicting longevity based on body size. For many species, small body size means higher metabolic rate and shorter lifespan. For dogs, smaller body size = longer lifespan. Dr. Ana Jimenez (Colgate University) presented research at the Comparative Physiology meeting this weekend showing that larger dogs do indeed develop more DNA damage with aging than smaller dogs.

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