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 September 14, 2007
Journal of Experimental Biology 210, 3407-3414 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.005090
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 Google Scholar
Google Scholar
Right arrow Articles by Moe, B.
Right arrow Articles by Chastel, O.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Moe, B.
Right arrow Articles by Chastel, O.

Is basal metabolic rate influenced by age in a long-lived seabird, the snow petrel?

Børge Moe1,*, Frédéric Angelier2, Claus Bech1 and Olivier Chastel2

1 Department of Biology, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
2 Centre d'Étude Biologiques de Chizé (CEBC), Centre National de la Recherche Scientifique, 79360 Villiers en Bois, France


Figure 1
View larger version (5K):
[in this window]
[in a new window]

  		Fig. 1. BMR (ml O2 min–1) in relation to body mass (g) (N=67). The axes are log-scaled, and the regression line represents a significant relationship (P<0.0005). The regression line is not adjusted for other effects. logBMR=(0.74±0.07)xlog(body mass)–(1.06±0.19), r2=0.61.

 

Figure 2
View larger version (7K):
[in this window]
[in a new window]

  		Fig. 2. Standardised BMR residuals in relation to the time when the BMR value was obtained for individual snow petrels (N=65). Time is expressed in h (0:00–24:00) and rad (0{pi}–2{pi}). The regression line represents a significant effect of the term cosine (time of BMR) on BMR (P=0.05) and indicates a cyclic diurnal rhythm in BMR with the lowest predicted values at 12:00 h and the highest predicted values at 00:00 h. `Night' and `day' measurements refer to BMR measurements that were started during the night (at 22:10 h) and the day (at 11:30 h), respectively. The BMR residuals were obtained from the model in Table 1 (BMR controlled for body mass and body condition). Standardised residuals are divided by an estimate of their standard deviation (s.d.), and have mean=0 and s.d.=1.

 

Figure 3
View larger version (4K):
[in this window]
[in a new window]

  		Fig. 3. Standardised BMR residuals in relation to age (years) of snow petrels (N=38, range 8–39 years old). The birds are of known age because they were ringed as chicks. The residuals were obtained from the final model in Table 2 (BMR controlled for body mass and body condition). Standardised residuals are divided by an estimate of their standard deviation (s.d.), and have mean=0 and s.d.=1.

 




© The Company of Biologists Ltd 2007