breath co2
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2020 ◽  
Vol 92 (19) ◽  
pp. 12943-12949
Author(s):  
Tao Zhou ◽  
Tao Wu ◽  
Qiang Wu ◽  
Weidong Chen ◽  
Mingwei Wu ◽  
...  

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Chiranjit Ghosh ◽  
Santanu Mandal ◽  
Gourab D. Banik ◽  
Abhijit Maity ◽  
Prabuddha Mukhopadhyay ◽  
...  

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Suman Som ◽  
Anulekha De ◽  
Gourab Dutta Banik ◽  
Abhijit Maity ◽  
Chiranjit Ghosh ◽  
...  

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Chiranjit Ghosh ◽  
Gourab D. Banik ◽  
Abhijit Maity ◽  
Suman Som ◽  
Arpita Chakraborty ◽  
...  

2009 ◽  
Vol 87 (1) ◽  
pp. 50-55 ◽  
Author(s):  
K. A. Hobson ◽  
I. Stirling ◽  
D. S. Andriashek

With a changing Arctic climate, it is important to know whether polar bears ( Ursus maritimus Phipps, 1774) can supplement their stored fat reserves by intake of terrestrial berries. Although polar bears are known to consume berries while on land, it has been difficult to quantify their relative dependence on stored adipose tissue and berry carbohydrates to meet their energy needs. We sampled breath CO2 from 300 bears fasting on land in western Hudson Bay during the open-water seasons of 1997 and 1998 and analyzed this breath for stable carbon isotope (δ13C) values. We found no difference in the bear breath δ13C values for bears known to have recently fed on berries and those that had not. The distribution of δ13C values was remarkably tight with average values ranging from –24.2‰ to –24.8‰ with no effect of age, sex, or year of capture. This result was counter to our simple isotopic discrimination model that predicted bears metabolizing adipose tissue derived from seals would have breath δ13C values close to –24.7‰ and those metabolizing berries exclusively would have values close to –32.6‰. If correct, our results suggests that the bears which had fed on berries while fasting on land received an insignificant amount of energetic benefit.


2007 ◽  
Vol 32 (8) ◽  
pp. 92-92
Author(s):  
Gerald E. Maloney
Keyword(s):  

2006 ◽  
Vol 20 (9) ◽  
pp. 1395-1399 ◽  
Author(s):  
M. Sponheimer ◽  
T. F. Robinson ◽  
T. E. Cerling ◽  
L. Tegland ◽  
B. L. Roeder ◽  
...  

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