The Metabolic Flexibility of Hovering Vertebrate Nectarivores

Author:

Welch Kenneth C.123ORCID,Myrka Alexander M.12,Ali Raafay Syed12,Dick Morag F.12

Affiliation:

1. Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada

2. Department of Cell & Systems Biology, University of Toronto, Toronto, Ontario, Canada

3. Center for the Neurobiology of Stress, University of Toronto Scarborough, Toronto, Ontario, Canada

Abstract

Foraging hummingbirds and nectar bats oxidize both glucose and fructose from nectar at exceptionally high rates. Rapid sugar flux is made possible by adaptations to digestive, cardiovascular, and metabolic physiology affecting shared and distinct pathways for the processing of each sugar. Still, how these animals partition and regulate the metabolism of each sugar and whether this occurs differently between hummingbirds and bats remain unclear.

Funder

Gouvernement du Canada | Natural Sciences and Engineering Research Council of Canada (Conseil de Recherches en Sciences Naturelles et en Génie du Canada)

Human Frontier Science Program (HFSP)

Canada Foundation for Innovation (Fondation canadienne pour l'innovation)

Publisher

American Physiological Society

Subject

Physiology

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