Life Lines by Dr. Dolittle

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Tag Archive for ‘avian’

Live fast, die young

Researchers have long known that smaller animals have higher metabolisms and tend to die younger than larger animals. Think about it – a mouse typically only lives about 2 years whereas an elephant in the wild may live 50-70 years, depending on the species. After studying over 700 species of birds and 540 species of mammals, scientists discovered that migratory animals also live faster (mature and reproduce earlier) and die […]

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PUFAs change muscle characteristics in a migratory bird without improving flight performance

Migratory birds are undoubtedly endurance athletes. In fact, their flights last hours to days. Could you imagine? But, unlike mammals that fuel endurance exercise by burning carbohydrates, birds fuel their endurance flights with fat. In a new study published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology, researchers were curious about whether the TYPE of dietary fat used to fuel endurance exercise was important. To examine this […]

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Study shows warm-blooded animals adapt better to climate changes

A new study published in Nature Ecology and Evolution looked at fossil records, current distributions and the phylogenetic relationships for over 11,000 terrestrial vertebrates. Using historical records to reconstruct climate and geographical ranges they found that birds and mammals were more successful and faster than cold-blooded animals at adapting to climate changes as well as expanding or changing the location or range of their habitats. In a quote from Scientific American, […]

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Avian vascular anatomy revealed

This is such a beautiful award-winning image of the complex vascular networks in a pigeon. The image was captured using  CT scan technology and a novel contrasting agent called BriteVu that allows visualization of even tiny capillaries. This image was captured by Scott Echols who is a member of the Grey Parrot Anatomy Project, whose goals are to create technologies to study animal anatomy. The complex capillary network located in […]

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