Point of no return : zero philopatry in an otherwise philopatric bird
(2016) The 16th congress of the International Society for Behavioral Ecology.- Abstract
- The return of individual birds to an exact area in successional years is a remarkable phenomenon. Here we report on the remarkably reversed: the complete absence of returning individuals of a migratory passerine with otherwise pronounced philopatry. In Abisko in northern Sweden none of the banded adult willow warblers (Phylloscopus trochilus) returned to breed 2011-14. This is in stark contrast to all other published reports and to our other sites where 18-38% of adults returned. We investigated this aberrancy in Abisko by analysing three parameters influencing philopatry; nest predation, breeding success and density, and predicted that absence of philopatry should co-occur with low breeding success and density and/or high nest predation.... (More)
- The return of individual birds to an exact area in successional years is a remarkable phenomenon. Here we report on the remarkably reversed: the complete absence of returning individuals of a migratory passerine with otherwise pronounced philopatry. In Abisko in northern Sweden none of the banded adult willow warblers (Phylloscopus trochilus) returned to breed 2011-14. This is in stark contrast to all other published reports and to our other sites where 18-38% of adults returned. We investigated this aberrancy in Abisko by analysing three parameters influencing philopatry; nest predation, breeding success and density, and predicted that absence of philopatry should co-occur with low breeding success and density and/or high nest predation. The results did not corroborate this. Instead, we suggest that the absence of philopatry is caused by an influx of southern, dispersal-prone individuals deploying another breeding strategy, enabled by milder climate and low density. (Less)
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https://lup.lub.lu.se/record/8552fec8-aab3-48bb-9867-68a0bc02f3a1
- author
- Hedlund, Johanna LU
- publishing date
- 2016
- type
- Contribution to conference
- publication status
- published
- conference name
- The 16th congress of the International Society for Behavioral Ecology.
- conference location
- Exeter, United Kingdom
- conference dates
- 2016-07-20
- language
- English
- LU publication?
- no
- id
- 8552fec8-aab3-48bb-9867-68a0bc02f3a1
- date added to LUP
- 2019-11-01 17:31:51
- date last changed
- 2019-11-04 16:44:12
@misc{8552fec8-aab3-48bb-9867-68a0bc02f3a1,
abstract = {{The return of individual birds to an exact area in successional years is a remarkable phenomenon. Here we report on the remarkably reversed: the complete absence of returning individuals of a migratory passerine with otherwise pronounced philopatry. In Abisko in northern Sweden none of the banded adult willow warblers (Phylloscopus trochilus) returned to breed 2011-14. This is in stark contrast to all other published reports and to our other sites where 18-38% of adults returned. We investigated this aberrancy in Abisko by analysing three parameters influencing philopatry; nest predation, breeding success and density, and predicted that absence of philopatry should co-occur with low breeding success and density and/or high nest predation. The results did not corroborate this. Instead, we suggest that the absence of philopatry is caused by an influx of southern, dispersal-prone individuals deploying another breeding strategy, enabled by milder climate and low density.}},
author = {{Hedlund, Johanna}},
language = {{eng}},
title = {{Point of no return : zero philopatry in an otherwise philopatric bird}},
year = {{2016}},
}