Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird
This study examines fuel use and metabolism in a group of long-distance migrating birds, red knots Calidris canutus (Scolopacidae), flying under controlled conditions in a wind tunnel for up to 10 h. Data are compared with values for resting birds fasting for the same time. Plasma levels of free fat...
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The Company of Biologists Ltd
2002
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Online Access: | https://lup.lub.lu.se/record/329166 |
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ftulundlup:oai:lup.lub.lu.se:e8fa53c3-1259-47fc-b6d9-757acf7e1671 2023-05-15T15:48:24+02:00 Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird Jenni-Eiermann, Susanne Jenni, Lukas Kvist, Anders Lindström, Åke Piersma, Theunis Visser, G Henk 2002 https://lup.lub.lu.se/record/329166 eng eng The Company of Biologists Ltd https://lup.lub.lu.se/record/329166 pmid:12124368 wos:000177855700010 scopus:0036672049 Journal of Experimental Biology; 205(16), pp 2453-2460 (2002) ISSN: 1477-9145 Ecology lipid catabolism expenditure energy plasma metabolite Calidris canutus red knot bird flight protein catabolism migration contributiontojournal/article info:eu-repo/semantics/article text 2002 ftulundlup 2023-02-01T23:33:12Z This study examines fuel use and metabolism in a group of long-distance migrating birds, red knots Calidris canutus (Scolopacidae), flying under controlled conditions in a wind tunnel for up to 10 h. Data are compared with values for resting birds fasting for the same time. Plasma levels of free fatty acids, glycerol and uric acid were elevated during flight, irrespective of flight duration (1-10h). Triglyceride levels, the estimated concentration of very-low-density lipoproteins (VLDLs) and beta-hydroxybutyrate levels were lower during flight, while glucose levels did not change. In flying birds, plasma levels of uric acid and lipid catabolites were positively correlated with the residual variation in body mass loss, and lipid catabolites with energy expenditure (as measured using the doubly labelled water method), after removing the effect of initial body mass. The plasma metabolite levels indicate: (i) that the rates of catabolism of lipids from adipose tissue and of protein are higher during flight; (H) that low ketone body concentrations probably facilitate fatty acid release from adipose tissue; (iii) that low triglyceride and VLDL levels do not indicate the use of an additional pathway of fatty acid delivery, as found in small birds; and (iv) that the relationships between energy expenditure, body mass loss and metabolic pattern suggest that a higher individual energy expenditure entails a higher rate of catabolism of both lipids and protein and not a shift in fuel substrate. Article in Journal/Newspaper Calidris canutus Red Knot Lund University Publications (LUP) |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology lipid catabolism expenditure energy plasma metabolite Calidris canutus red knot bird flight protein catabolism migration |
spellingShingle |
Ecology lipid catabolism expenditure energy plasma metabolite Calidris canutus red knot bird flight protein catabolism migration Jenni-Eiermann, Susanne Jenni, Lukas Kvist, Anders Lindström, Åke Piersma, Theunis Visser, G Henk Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird |
topic_facet |
Ecology lipid catabolism expenditure energy plasma metabolite Calidris canutus red knot bird flight protein catabolism migration |
description |
This study examines fuel use and metabolism in a group of long-distance migrating birds, red knots Calidris canutus (Scolopacidae), flying under controlled conditions in a wind tunnel for up to 10 h. Data are compared with values for resting birds fasting for the same time. Plasma levels of free fatty acids, glycerol and uric acid were elevated during flight, irrespective of flight duration (1-10h). Triglyceride levels, the estimated concentration of very-low-density lipoproteins (VLDLs) and beta-hydroxybutyrate levels were lower during flight, while glucose levels did not change. In flying birds, plasma levels of uric acid and lipid catabolites were positively correlated with the residual variation in body mass loss, and lipid catabolites with energy expenditure (as measured using the doubly labelled water method), after removing the effect of initial body mass. The plasma metabolite levels indicate: (i) that the rates of catabolism of lipids from adipose tissue and of protein are higher during flight; (H) that low ketone body concentrations probably facilitate fatty acid release from adipose tissue; (iii) that low triglyceride and VLDL levels do not indicate the use of an additional pathway of fatty acid delivery, as found in small birds; and (iv) that the relationships between energy expenditure, body mass loss and metabolic pattern suggest that a higher individual energy expenditure entails a higher rate of catabolism of both lipids and protein and not a shift in fuel substrate. |
format |
Article in Journal/Newspaper |
author |
Jenni-Eiermann, Susanne Jenni, Lukas Kvist, Anders Lindström, Åke Piersma, Theunis Visser, G Henk |
author_facet |
Jenni-Eiermann, Susanne Jenni, Lukas Kvist, Anders Lindström, Åke Piersma, Theunis Visser, G Henk |
author_sort |
Jenni-Eiermann, Susanne |
title |
Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird |
title_short |
Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird |
title_full |
Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird |
title_fullStr |
Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird |
title_full_unstemmed |
Fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird |
title_sort |
fuel use and metabolic response to endurance exercise: a wind tunnel study of a long-distance migrant shorebird |
publisher |
The Company of Biologists Ltd |
publishDate |
2002 |
url |
https://lup.lub.lu.se/record/329166 |
genre |
Calidris canutus Red Knot |
genre_facet |
Calidris canutus Red Knot |
op_source |
Journal of Experimental Biology; 205(16), pp 2453-2460 (2002) ISSN: 1477-9145 |
op_relation |
https://lup.lub.lu.se/record/329166 pmid:12124368 wos:000177855700010 scopus:0036672049 |
_version_ |
1766383378946326528 |