Metabolic characteristics and body composition in house finches: effects of seasonal acclimatization
dc.contributor.author | O'Connor, T. P. | en_US |
dc.date.accessioned | 2006-09-11T18:37:40Z | |
dc.date.available | 2006-09-11T18:37:40Z | |
dc.date.issued | 1995-09 | en_US |
dc.identifier.citation | O'Connor, T. P.; (1995). "Metabolic characteristics and body composition in house finches: effects of seasonal acclimatization." Journal of Comparative Physiology B 165(4): 298-305. <http://hdl.handle.net/2027.42/47132> | en_US |
dc.identifier.issn | 1432-136X | en_US |
dc.identifier.issn | 0174-1578 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/47132 | |
dc.description.abstract | House finches ( Carpodacus mexicanus ) from the introduced population in the eastern United States were examined to assess metabolic characteristics and aspects of body composition associated with seasonal acclimatization. Wild birds were captured during winter (January and February) and late spring (May and June) in southeastern Michigan. Standard metabolic rates did not differ seasonally, but cold-induced “peak” metabolic rate was 28% greater in winter than late spring. The capacity to maintain elevated metabolic rates during cold exposure (“thermogenic endurance”) increased significantly from an average of 26.1 to 101.3 min in late spring and winter, respectively. House finches captured in the late afternoon during winter had twice as much stored fat as those during late spring. Both the wet mass and lean dry mass of the pectoralis muscle, a primary shivering effector, were significantly greater during winter. The seasonal changes in peak metabolism and thermogenic endurance demonstrate the existence and magnitude of metabolic seasonal acclimatization in eastern house finches. Increased quantities of stored fat during winter appear to play a role in acclimatization, yet other physiological adjustments such as lipid mobilization and catabolism are also likely to be involved. | en_US |
dc.format.extent | 941347 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Springer-Verlag | en_US |
dc.subject.other | Thermogentic Endurance | en_US |
dc.subject.other | Life Sciences | en_US |
dc.subject.other | Biochemistry, General | en_US |
dc.subject.other | Peak Metabolism | en_US |
dc.subject.other | Avian Fat Metabolism | en_US |
dc.subject.other | Zoology | en_US |
dc.subject.other | Finch, Carpodacus Mexicanus | en_US |
dc.subject.other | Biomedicine General | en_US |
dc.subject.other | Human Physiology | en_US |
dc.subject.other | Thermoregulation | en_US |
dc.subject.other | Animal Physiology | en_US |
dc.title | Metabolic characteristics and body composition in house finches: effects of seasonal acclimatization | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Natural Resources and Environment | en_US |
dc.subject.hlbsecondlevel | Molecular, Cellular and Developmental Biology | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA; Department of Physiology, School of Medicine, University of California, 90024-1751, Los Angeles, CA, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/47132/1/360_2004_Article_BF00367313.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF00367313 | en_US |
dc.identifier.source | Journal of Comparative Physiology B | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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