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Autumn phenology and morphometrics in the Garden Warbler Sylvia borin at the Ottenby Bird Observatory, Sweden

Iwajomo, Soladoye B.; Hedenström, Anders LU and Ottosson, Ulf (2012) In Ornis Fennica 89(4). p.233-240
Abstract
Trapping and ringing near ecological barriers can provide useful information about the migration strategies of bird species. In this paper we analyzed ringing data of the Garden Warbler, collected within the period of 1950-2008 at the Ottenby Bird Observatory, south-eastern Sweden, and describe patterns in migration phenology, morphometrics and fuel load. A total of 4,351 individuals aged as either adults or juveniles were ringed during the period (yearly averages 7.3 adults and 83.1 juveniles) in addition to 1,514 birds of unknown age. Both age-specific and combined yearly totals did not significantly vary over the years. Median passage dates were 24 August, 30 August and 2 September for adults, juveniles and birds of unknown age,... (More)
Trapping and ringing near ecological barriers can provide useful information about the migration strategies of bird species. In this paper we analyzed ringing data of the Garden Warbler, collected within the period of 1950-2008 at the Ottenby Bird Observatory, south-eastern Sweden, and describe patterns in migration phenology, morphometrics and fuel load. A total of 4,351 individuals aged as either adults or juveniles were ringed during the period (yearly averages 7.3 adults and 83.1 juveniles) in addition to 1,514 birds of unknown age. Both age-specific and combined yearly totals did not significantly vary over the years. Median passage dates were 24 August, 30 August and 2 September for adults, juveniles and birds of unknown age, respectively. Median passage did not change significantly over the years. Among adults, larger individuals passed the observatory earlier than smaller individuals. The average fuel load was estimated at 24.3% of Lean Body Mass (LBM), and late-migrating individuals had higher fuel deposits than early migrants. Maximum fuel load was estimated at 82.5% of LBM; such an individual may be capable of a direct flight from Ottenby region to the Mediterranean area. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ornis Fennica
volume
89
issue
4
pages
233 - 240
publisher
BirdLife Finland
external identifiers
  • wos:000314428700001
  • scopus:84877729503
ISSN
0030-5685
language
English
LU publication?
yes
id
159c1fb6-e080-45e1-af4d-c914f0b2ca49 (old id 3577802)
alternative location
http://www.birdlife.fi/ornisfennica/pdf/2012/of_89_233-240.pdf
date added to LUP
2013-03-20 14:48:28
date last changed
2017-01-01 06:11:45
@article{159c1fb6-e080-45e1-af4d-c914f0b2ca49,
  abstract     = {Trapping and ringing near ecological barriers can provide useful information about the migration strategies of bird species. In this paper we analyzed ringing data of the Garden Warbler, collected within the period of 1950-2008 at the Ottenby Bird Observatory, south-eastern Sweden, and describe patterns in migration phenology, morphometrics and fuel load. A total of 4,351 individuals aged as either adults or juveniles were ringed during the period (yearly averages 7.3 adults and 83.1 juveniles) in addition to 1,514 birds of unknown age. Both age-specific and combined yearly totals did not significantly vary over the years. Median passage dates were 24 August, 30 August and 2 September for adults, juveniles and birds of unknown age, respectively. Median passage did not change significantly over the years. Among adults, larger individuals passed the observatory earlier than smaller individuals. The average fuel load was estimated at 24.3% of Lean Body Mass (LBM), and late-migrating individuals had higher fuel deposits than early migrants. Maximum fuel load was estimated at 82.5% of LBM; such an individual may be capable of a direct flight from Ottenby region to the Mediterranean area.},
  author       = {Iwajomo, Soladoye B. and Hedenström, Anders and Ottosson, Ulf},
  issn         = {0030-5685},
  language     = {eng},
  number       = {4},
  pages        = {233--240},
  publisher    = {BirdLife Finland},
  series       = {Ornis Fennica},
  title        = {Autumn phenology and morphometrics in the Garden Warbler Sylvia borin at the Ottenby Bird Observatory, Sweden},
  volume       = {89},
  year         = {2012},
}