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Temporal and spatial patterns of repeated migratory journeys by ospreys

Alerstam, Thomas LU ; Hake, M and Kjellén, Nils LU (2006) In Animal Behaviour 71(3). p.555-566
Abstract
We used satellite-tracking data from repeated journeys between Europe and West Africa by the same osprey, Pandion haliaetus, individuals to test whether the timing of migration differs between spring and autumn and whether landmarks and stopover goal areas are important for navigation. The timing of migration varied more in autumn than in spring, owing to significant differences between individuals (related to sex) in autumn migration dates. Autumn journeys were significantly slower than spring journeys because they included more stopover days. The difference may be explained by environmental conditions restricting the timing of migration in spring, by differences in opportunities to deposit fuel prior to departure, and by differences in... (More)
We used satellite-tracking data from repeated journeys between Europe and West Africa by the same osprey, Pandion haliaetus, individuals to test whether the timing of migration differs between spring and autumn and whether landmarks and stopover goal areas are important for navigation. The timing of migration varied more in autumn than in spring, owing to significant differences between individuals (related to sex) in autumn migration dates. Autumn journeys were significantly slower than spring journeys because they included more stopover days. The difference may be explained by environmental conditions restricting the timing of migration in spring, by differences in opportunities to deposit fuel prior to departure, and by differences in expected changes in foraging/fuelling conditions along the route. Flight paths from repeated journeys by the same individual were often 120-405 km apart (maximum east-west separation 1400 km). These distances exceed the expected normal range of vision, suggesting that the ospreys did not find their way by following familiar landmarks. Flight paths converged in some regions, indicating the existence of up to three intermediary goal areas along the route of individual birds. Between these goal regions route fidelity was low, and the ospreys could find the next goal region after extensive deviation, presumably by map-based navigation and possibly in combination with path integration. (c) 2006 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All tights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Animal Behaviour
volume
71
issue
3
pages
555 - 566
publisher
Elsevier Ltd
external identifiers
  • wos:000236430400010
  • scopus:33644652897
ISSN
1095-8282
DOI
10.1016/j.anbehav.2005.05.016
language
English
LU publication?
yes
id
08e1a84d-3072-43e3-8ecf-28718c039099 (old id 159405)
date added to LUP
2007-06-21 14:21:29
date last changed
2019-09-17 02:03:02
@article{08e1a84d-3072-43e3-8ecf-28718c039099,
  abstract     = {We used satellite-tracking data from repeated journeys between Europe and West Africa by the same osprey, Pandion haliaetus, individuals to test whether the timing of migration differs between spring and autumn and whether landmarks and stopover goal areas are important for navigation. The timing of migration varied more in autumn than in spring, owing to significant differences between individuals (related to sex) in autumn migration dates. Autumn journeys were significantly slower than spring journeys because they included more stopover days. The difference may be explained by environmental conditions restricting the timing of migration in spring, by differences in opportunities to deposit fuel prior to departure, and by differences in expected changes in foraging/fuelling conditions along the route. Flight paths from repeated journeys by the same individual were often 120-405 km apart (maximum east-west separation 1400 km). These distances exceed the expected normal range of vision, suggesting that the ospreys did not find their way by following familiar landmarks. Flight paths converged in some regions, indicating the existence of up to three intermediary goal areas along the route of individual birds. Between these goal regions route fidelity was low, and the ospreys could find the next goal region after extensive deviation, presumably by map-based navigation and possibly in combination with path integration. (c) 2006 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All tights reserved.},
  author       = {Alerstam, Thomas and Hake, M and Kjellén, Nils},
  issn         = {1095-8282},
  language     = {eng},
  number       = {3},
  pages        = {555--566},
  publisher    = {Elsevier Ltd},
  series       = {Animal Behaviour},
  title        = {Temporal and spatial patterns of repeated migratory journeys by ospreys},
  url          = {http://dx.doi.org/10.1016/j.anbehav.2005.05.016},
  volume       = {71},
  year         = {2006},
}