Document Detail


Sugar gustatory thresholds and sugar selection in two species of Neotropical nectar-eating bats.
MedLine Citation:
PMID:  23085289     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Nectar-feeding bats play an important role in natural communities acting as pollinators; however, the characteristics that affect their food selection are unclear. Here we explore the role that sugar gustatory thresholds and sugar concentration play on sugar selection of Glossophaga soricina and Leptonycteris yerbabuenae. We offered bats paired feeders containing sugar solutions of sucrose (S), glucose (G) or fructose (F) vs. pure water, and sucrose vs. 1:1 equicaloric solutions of glucose-fructose at 5, 15 and 35% (wt./vol.). To see the effect of sweetness on sugar selection, we habituated bats with a diet containing either sucrose or hexoses and subsequently evaluated sugar preferences. Sugar thresholds were S<G,F for G. soricina and G<S<F for L. yerbabuenae. These thresholds did not match with sugar preferences when bats fed on dilute nectars. Leptonycteris yerbabuenae changed its sugar preferences with concentration while G. soricina did not. Finally, bats consistently preferred the sugar they were habituated to. Our results suggest that bats become accustomed to the sugar found in the most abundant plants they use, and thus prefer the most common sugars included in their diet. This could confer an advantage by allowing them shifting sugar preferences on the most common food present in their environment.
Authors:
Jorge Ayala-Berdon; Nelly Rodríguez-Peña; Cristian García Leal; Kathryn E Stoner; Jorge E Schondube
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-18
Journal Detail:
Title:  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology     Volume:  -     ISSN:  1531-4332     ISO Abbreviation:  Comp. Biochem. Physiol., Part A Mol. Integr. Physiol.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806096     Medline TA:  Comp Biochem Physiol A Mol Integr Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Inc.
Affiliation:
Centro de Investigaciónes en Ecosistemas, Universidad Nacional Autónoma de México, Apartado Postal 27-3 (Xangari), 58089, Morelia, Michoacán, México. Electronic address: jayala@oikos.unam.mx.
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