Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears
Behaviour on migration was often suggested to be selected for time-minimising strategies. Current optimality models predict that optimal fuel loads at departure from stopover sites should increase with increasing fuel deposition rates. We modified such models for the special case of the east Atlanti...
Published in: | Behavioral Ecology and Sociobiology |
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Online Access: | https://lup.lub.lu.se/record/954599 https://doi.org/10.1007/s00265-007-0534-8 |
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ftulundlup:oai:lup.lub.lu.se:ad6a4f37-bb5c-45e6-8f8d-0c9b1ce9a558 2023-05-15T16:29:53+02:00 Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears Delingat, Julia Bairlein, Franz Hedenström, Anders 2008 https://lup.lub.lu.se/record/954599 https://doi.org/10.1007/s00265-007-0534-8 eng eng Springer https://lup.lub.lu.se/record/954599 http://dx.doi.org/10.1007/s00265-007-0534-8 wos:000255089900004 scopus:42449099546 Behavioral Ecology and Sociobiology; 62(7), pp 1069-1078 (2008) ISSN: 1432-0762 Biological Sciences flight costs barrier crossing optimal migration Oenanthe oenanthe fuel loads contributiontojournal/article info:eu-repo/semantics/article text 2008 ftulundlup https://doi.org/10.1007/s00265-007-0534-8 2023-02-01T23:32:47Z Behaviour on migration was often suggested to be selected for time-minimising strategies. Current optimality models predict that optimal fuel loads at departure from stopover sites should increase with increasing fuel deposition rates. We modified such models for the special case of the east Atlantic crossing of the Northern Wheatear (Oenanthe oenanthe). From optimality theory, we predict that optimal time-minimising behaviour in front of such a barrier should result in a positive correlation between fuel deposition rates and departure fuel loads only above a certain threshold, which is the minimum fuel load (f(min)) required for the barrier crossing. Using a robust range equation, we calculated the minimum fuel loads for different barrier crossings and predict that time-minimising wheatears should deposit a minimum of 24% fuel in relation to lean body mass (m (0)) for the sea crossing between Iceland and Scotland. Fuel loads of departing birds in autumn in Iceland reached this value only marginally but showed positive correlation between fuel deposition rate (FDR) and departure fuel load (DFL). Birds at Fair Isle (Scotland) in spring, which were heading towards Iceland or Greenland, were significantly heavier and even showed signs of overloading with fuel loads up to 50% of lean body mass. Departure decisions of Icelandic birds correlated significantly with favourable wind situations when assuming a migration direction towards Spain; however, the low departure fuel loads contradict a direct non-stop flight. Article in Journal/Newspaper Greenland Iceland Lund University Publications (LUP) Greenland Behavioral Ecology and Sociobiology 62 7 1069 1078 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Biological Sciences flight costs barrier crossing optimal migration Oenanthe oenanthe fuel loads |
spellingShingle |
Biological Sciences flight costs barrier crossing optimal migration Oenanthe oenanthe fuel loads Delingat, Julia Bairlein, Franz Hedenström, Anders Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears |
topic_facet |
Biological Sciences flight costs barrier crossing optimal migration Oenanthe oenanthe fuel loads |
description |
Behaviour on migration was often suggested to be selected for time-minimising strategies. Current optimality models predict that optimal fuel loads at departure from stopover sites should increase with increasing fuel deposition rates. We modified such models for the special case of the east Atlantic crossing of the Northern Wheatear (Oenanthe oenanthe). From optimality theory, we predict that optimal time-minimising behaviour in front of such a barrier should result in a positive correlation between fuel deposition rates and departure fuel loads only above a certain threshold, which is the minimum fuel load (f(min)) required for the barrier crossing. Using a robust range equation, we calculated the minimum fuel loads for different barrier crossings and predict that time-minimising wheatears should deposit a minimum of 24% fuel in relation to lean body mass (m (0)) for the sea crossing between Iceland and Scotland. Fuel loads of departing birds in autumn in Iceland reached this value only marginally but showed positive correlation between fuel deposition rate (FDR) and departure fuel load (DFL). Birds at Fair Isle (Scotland) in spring, which were heading towards Iceland or Greenland, were significantly heavier and even showed signs of overloading with fuel loads up to 50% of lean body mass. Departure decisions of Icelandic birds correlated significantly with favourable wind situations when assuming a migration direction towards Spain; however, the low departure fuel loads contradict a direct non-stop flight. |
format |
Article in Journal/Newspaper |
author |
Delingat, Julia Bairlein, Franz Hedenström, Anders |
author_facet |
Delingat, Julia Bairlein, Franz Hedenström, Anders |
author_sort |
Delingat, Julia |
title |
Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears |
title_short |
Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears |
title_full |
Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears |
title_fullStr |
Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears |
title_full_unstemmed |
Obligatory barrier crossing and adaptive fuel management in migratory birds: the case of Atlantic crossing in Northern Wheatears |
title_sort |
obligatory barrier crossing and adaptive fuel management in migratory birds: the case of atlantic crossing in northern wheatears |
publisher |
Springer |
publishDate |
2008 |
url |
https://lup.lub.lu.se/record/954599 https://doi.org/10.1007/s00265-007-0534-8 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Iceland |
genre_facet |
Greenland Iceland |
op_source |
Behavioral Ecology and Sociobiology; 62(7), pp 1069-1078 (2008) ISSN: 1432-0762 |
op_relation |
https://lup.lub.lu.se/record/954599 http://dx.doi.org/10.1007/s00265-007-0534-8 wos:000255089900004 scopus:42449099546 |
op_doi |
https://doi.org/10.1007/s00265-007-0534-8 |
container_title |
Behavioral Ecology and Sociobiology |
container_volume |
62 |
container_issue |
7 |
container_start_page |
1069 |
op_container_end_page |
1078 |
_version_ |
1766019596838502400 |