Point of no return: zero philopatry in an otherwise philopatric bird

Forskningsoutput: KonferensbidragKonferensabstractPeer review

Sammanfattning

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.
Originalspråkengelska
StatusPublished - 2016
Externt publiceradJa
EvenemangThe 16th congress of the International Society for Behavioral Ecology. - Exeter, Storbritannien
Varaktighet: 2016 juli 20 → …

Konferens

KonferensThe 16th congress of the International Society for Behavioral Ecology.
Land/TerritoriumStorbritannien
OrtExeter
Period2016/07/20 → …

Fingeravtryck

Utforska forskningsämnen för ”Point of no return: zero philopatry in an otherwise philopatric bird”. Tillsammans bildar de ett unikt fingeravtryck.

Citera det här