Wind selectivity of migratory flight departures in birds
(2000) In Behavioral Ecology and Sociobiology 47(3). p.140-144- Abstract
- Optimal migration theory predicts that birds minimizing the overall time of migration should adjust stopover duration with respect to the rate of fuel accumulation. Recent theoretical developments also take into account the wind situation and predict that there is a time window (a set of days) during which birds should depart when assisted by winds but will not do so if there are head winds. There is also a final day when birds will depart irrespective of wind conditions. Hence, the wind model of optimal migration theory predicts that birds should be sensitive to winds and that there should be a correlation between departures and winds blowing towards the intended migration direction. We tested this assumption by tracking the departures of... (More)
- Optimal migration theory predicts that birds minimizing the overall time of migration should adjust stopover duration with respect to the rate of fuel accumulation. Recent theoretical developments also take into account the wind situation and predict that there is a time window (a set of days) during which birds should depart when assisted by winds but will not do so if there are head winds. There is also a final day when birds will depart irrespective of wind conditions. Hence, the wind model of optimal migration theory predicts that birds should be sensitive to winds and that there should be a correlation between departures and winds blowing towards the intended migration direction. We tested this assumption by tracking the departures of radio-tagged passerines during autumn migration in southern Sweden. Our birds were moderately to very fat when released and therefore energetically ready for departure. There was a significant correlation between direction of departure and wind direction. We also found that during days when birds departed there was a significantly larger tail wind component than during days when birds were present but did not depart. Our results show that passerines do take the current wind situation into account when departing on migratory flights. We also briefly discuss possible clues that birds use when estimating wind direction and strength. The inclusion of wind is an important amendment to optimal migration theory of birds and should be explored further. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/146082
- author
- Åkesson, Susanne LU and Hedenström, Anders LU
- organization
- publishing date
- 2000
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Behavioral Ecology and Sociobiology
- volume
- 47
- issue
- 3
- pages
- 140 - 144
- publisher
- Springer
- external identifiers
-
- scopus:0034049036
- ISSN
- 1432-0762
- DOI
- 10.1007/s002650050004
- language
- English
- LU publication?
- yes
- id
- 6085d029-b229-4abe-a725-88f2f9f30fba (old id 146082)
- date added to LUP
- 2016-04-01 12:12:09
- date last changed
- 2024-04-23 08:37:29
@article{6085d029-b229-4abe-a725-88f2f9f30fba,
abstract = {{Optimal migration theory predicts that birds minimizing the overall time of migration should adjust stopover duration with respect to the rate of fuel accumulation. Recent theoretical developments also take into account the wind situation and predict that there is a time window (a set of days) during which birds should depart when assisted by winds but will not do so if there are head winds. There is also a final day when birds will depart irrespective of wind conditions. Hence, the wind model of optimal migration theory predicts that birds should be sensitive to winds and that there should be a correlation between departures and winds blowing towards the intended migration direction. We tested this assumption by tracking the departures of radio-tagged passerines during autumn migration in southern Sweden. Our birds were moderately to very fat when released and therefore energetically ready for departure. There was a significant correlation between direction of departure and wind direction. We also found that during days when birds departed there was a significantly larger tail wind component than during days when birds were present but did not depart. Our results show that passerines do take the current wind situation into account when departing on migratory flights. We also briefly discuss possible clues that birds use when estimating wind direction and strength. The inclusion of wind is an important amendment to optimal migration theory of birds and should be explored further.}},
author = {{Åkesson, Susanne and Hedenström, Anders}},
issn = {{1432-0762}},
language = {{eng}},
number = {{3}},
pages = {{140--144}},
publisher = {{Springer}},
series = {{Behavioral Ecology and Sociobiology}},
title = {{Wind selectivity of migratory flight departures in birds}},
url = {{http://dx.doi.org/10.1007/s002650050004}},
doi = {{10.1007/s002650050004}},
volume = {{47}},
year = {{2000}},
}