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Flexibility in daily travel routines causes regional variation in bird migration speed

Klaassen, Raymond LU ; Strandberg, Roine LU ; Hake, Mikael and Alerstam, Thomas LU (2008) In Behavioral Ecology and Sociobiology 62(9). p.1427-1432
Abstract
We used novel Global Positioning System-based satellite telemetry to reconstruct daily time budgets on travelling days of a long-distance migrant, the Osprey Pandion haliaetus, to reveal how landscape affects migratory performance. We compared daily travel routines between the Ospreys' passage of Europe and the Sahara. In Europe, where feeding habitat is abundant, Ospreys fed both before-after flights and during interruptions, thus, combining migration with foraging. This resulted in a 2.7-h shorter daily flight period in Europe than in the Sahara. A calculated energy budget indicated that a 'fly-and-forage migration strategy' is favourable in Europe because associated benefits (energy intake) more than outweigh costs (reduced flight... (More)
We used novel Global Positioning System-based satellite telemetry to reconstruct daily time budgets on travelling days of a long-distance migrant, the Osprey Pandion haliaetus, to reveal how landscape affects migratory performance. We compared daily travel routines between the Ospreys' passage of Europe and the Sahara. In Europe, where feeding habitat is abundant, Ospreys fed both before-after flights and during interruptions, thus, combining migration with foraging. This resulted in a 2.7-h shorter daily flight period in Europe than in the Sahara. A calculated energy budget indicated that a 'fly-and-forage migration strategy' is favourable in Europe because associated benefits (energy intake) more than outweigh costs (reduced flight time). The much shorter flight time in Europe was the main explanation why Ospreys covered on average 78 km less distance on a travelling day in Europe than in the Sahara. In addition, there were regional differences in hourly flight speeds that are most probably the result of variation in thermal soaring conditions. We conclude that landscape properties have a profound effect on migration through regional variation in daily routines. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
time, satellite tracking, landscape ecology, flight speed, habitat use, budget
in
Behavioral Ecology and Sociobiology
volume
62
issue
9
pages
1427 - 1432
publisher
Springer
external identifiers
  • wos:000256475800006
  • scopus:44949234559
ISSN
1432-0762
DOI
10.1007/s00265-008-0572-x
language
English
LU publication?
yes
id
6bc04ba6-8aca-43f9-adeb-a8f860c45295 (old id 1255169)
date added to LUP
2008-10-17 13:52:15
date last changed
2017-08-27 04:37:13
@article{6bc04ba6-8aca-43f9-adeb-a8f860c45295,
  abstract     = {We used novel Global Positioning System-based satellite telemetry to reconstruct daily time budgets on travelling days of a long-distance migrant, the Osprey Pandion haliaetus, to reveal how landscape affects migratory performance. We compared daily travel routines between the Ospreys' passage of Europe and the Sahara. In Europe, where feeding habitat is abundant, Ospreys fed both before-after flights and during interruptions, thus, combining migration with foraging. This resulted in a 2.7-h shorter daily flight period in Europe than in the Sahara. A calculated energy budget indicated that a 'fly-and-forage migration strategy' is favourable in Europe because associated benefits (energy intake) more than outweigh costs (reduced flight time). The much shorter flight time in Europe was the main explanation why Ospreys covered on average 78 km less distance on a travelling day in Europe than in the Sahara. In addition, there were regional differences in hourly flight speeds that are most probably the result of variation in thermal soaring conditions. We conclude that landscape properties have a profound effect on migration through regional variation in daily routines.},
  author       = {Klaassen, Raymond and Strandberg, Roine and Hake, Mikael and Alerstam, Thomas},
  issn         = {1432-0762},
  keyword      = {time,satellite tracking,landscape ecology,flight speed,habitat use,budget},
  language     = {eng},
  number       = {9},
  pages        = {1427--1432},
  publisher    = {Springer},
  series       = {Behavioral Ecology and Sociobiology},
  title        = {Flexibility in daily travel routines causes regional variation in bird migration speed},
  url          = {http://dx.doi.org/10.1007/s00265-008-0572-x},
  volume       = {62},
  year         = {2008},
}