spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online June 11, 2007
Journal of Experimental Biology 210, 2154-2162 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.005363
This Article
Right arrow Summary Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Welch, K. C.
Right arrow Articles by Suarez, R. K.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Welch, K. C., Jr
Right arrow Articles by Suarez, R. K.

Oxidation rate and turnover of ingested sugar in hovering Anna's (Calypte anna) and rufous (Selasphorus rufus) hummingbirds

Kenneth C. Welch, Jr* and Raul K. Suarez

Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA 93106-9610, USA


Figure 1
View larger version (13K):
[in this window]
[in a new window]

  		Fig. 1. The stable carbon isotopic signature of expired CO2 ({delta}13Cbreath in {per thousand}, VPDB) in relation to (A) the time since the first feeding on cane sucrose solution (C4) and the consequent (B) time since the first feeding on beet sucrose solution (C3). M, male; F, female.

 

Figure 2
View larger version (6K):
[in this window]
[in a new window]

  		Fig. 2. Relationship between respiratory quotient (RQ=VCO2/VO2) and {delta}13C value of expired CO2 ({delta}13Cbreath) during the same hover-feeding event in Anna's (Calypte anna) and rufous (Selasphorus rufus) hummingbirds. Data are pooled for each species. Pairwise comparisons reveal a significant correlation between these variables for each species (S. rufus: r20=0.9494, P<0.0001; C. anna: r17=0.9065; P<0.0001).

 

Figure 3
View larger version (6K):
[in this window]
[in a new window]

  		Fig. 3. Average percentage of time spent hovering and of ingested cane sugar oxidized during experiments for rufous (S. rufus) and Anna's (C. anna) hummingbirds.

 




© The Company of Biologists Ltd 2007