Abstract:
:Aerobic activity levels increase with body temperature across vertebrates. Differences in these levels, from highly active to sedentary, are reflected in their ecology and behavior. Yet, the changes in the cardiovascular system that allow for greater oxygen supply at higher temperatures, and thus greater aerobic activity, remain unclear. Here we show that the total volume of red blood cells in the body increases exponentially with temperature across vertebrates, after controlling for effects of body size and taxonomy. These changes are accompanied by increases in relative heart mass, an indicator of aerobic activity. The results point to one way vertebrates may increase oxygen supply to meet the demands of greater activity at higher temperatures.
journal_name
PeerJjournal_title
PeerJauthors
Gillooly JF,Zenil-Ferguson Rdoi
10.7717/peerj.346subject
Has Abstractpub_date
2014-04-10 00:00:00pages
e346issn
2167-8359pii
346journal_volume
2pub_type
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