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Magnetic resonance imaging versus chemical fat extraction in a small passerine, the willow warbler Phylloscopus trochilus: A fat-score based statistical comparison

Hedenström, Anders LU ; Fagerlund, Timmy ; Rosén, Mikael LU and Wirestam, Ronnie LU orcid (2009) In Journal of Avian Biology 40(4). p.457-460
Abstract
Abstract in Undetermined
The amount of fat of a bird is a fundamental metric commonly used by avian biologists in studies of migration, winter energy management and condition. The methods used for estimating fat content range from simply measuring body mass and subtracting the estimated lean mass, visual scoring of subcutaneous fat deposits, to destructive extraction using a Soxhlet apparatus. We used magnetic resonance imaging (MRI) for non-invasive estimation of fat content in willow warblers Phylloscopus trochilus. According to an indirect comparison, made using a standardized fat scoring system as a common measure, the MRI method gave very similar fat amount as Soxhlet extraction and we discuss advantages of using MRI over... (More)
Abstract in Undetermined
The amount of fat of a bird is a fundamental metric commonly used by avian biologists in studies of migration, winter energy management and condition. The methods used for estimating fat content range from simply measuring body mass and subtracting the estimated lean mass, visual scoring of subcutaneous fat deposits, to destructive extraction using a Soxhlet apparatus. We used magnetic resonance imaging (MRI) for non-invasive estimation of fat content in willow warblers Phylloscopus trochilus. According to an indirect comparison, made using a standardized fat scoring system as a common measure, the MRI method gave very similar fat amount as Soxhlet extraction and we discuss advantages of using MRI over alternative methods. It was also shown that the commonly used fat scoring system yielded a nonlinear relationship between fat mass and fat score. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Avian Biology
volume
40
issue
4
pages
457 - 460
publisher
Blackwell
external identifiers
  • wos:000267882900014
  • scopus:67749144227
ISSN
0908-8857
DOI
10.1111/j.1600-048X.2008.04564.x
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Radiation Physics, Lund (013034000), Theoretical ecology (Closed 2011) (011006011), Department of Ecology (Closed 2011) (011006010)
id
fb21d8a5-caf2-4a83-b789-45dfa4648790 (old id 1439249)
date added to LUP
2016-04-01 12:14:17
date last changed
2021-09-22 04:18:27
@article{fb21d8a5-caf2-4a83-b789-45dfa4648790,
  abstract     = {Abstract in Undetermined<br/>The amount of fat of a bird is a fundamental metric commonly used by avian biologists in studies of migration, winter energy management and condition. The methods used for estimating fat content range from simply measuring body mass and subtracting the estimated lean mass, visual scoring of subcutaneous fat deposits, to destructive extraction using a Soxhlet apparatus. We used magnetic resonance imaging (MRI) for non-invasive estimation of fat content in willow warblers Phylloscopus trochilus. According to an indirect comparison, made using a standardized fat scoring system as a common measure, the MRI method gave very similar fat amount as Soxhlet extraction and we discuss advantages of using MRI over alternative methods. It was also shown that the commonly used fat scoring system yielded a nonlinear relationship between fat mass and fat score.},
  author       = {Hedenström, Anders and Fagerlund, Timmy and Rosén, Mikael and Wirestam, Ronnie},
  issn         = {0908-8857},
  language     = {eng},
  number       = {4},
  pages        = {457--460},
  publisher    = {Blackwell},
  series       = {Journal of Avian Biology},
  title        = {Magnetic resonance imaging versus chemical fat extraction in a small passerine, the willow warbler Phylloscopus trochilus: A fat-score based statistical comparison},
  url          = {http://dx.doi.org/10.1111/j.1600-048X.2008.04564.x},
  doi          = {10.1111/j.1600-048X.2008.04564.x},
  volume       = {40},
  year         = {2009},
}