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Causes and Consequences of Partial Migration in a Passerine Bird

Hegemann, Arne LU ; Marra, Peter P and Tieleman, B. Irene (2015) In American Naturalist 186(4). p.531-546
Abstract
Many animal species have populations in which some individuals migrate and others remain on the breeding grounds. This phenomenon is called partial migration. Despite substantial theoretical work, empirical data on causes and consequences of partial migration remain scarce, mainly because of difficulties associated with tracking individuals over large spatial scales. We used stable hydrogen isotopes in claw material to determine whether skylarks Alauda arvensis from a single breeding population in the Netherlands had migrated or remained resident in the previous winter and investigated whether there were causes or consequences of either strategy. Age and sex had no influence on the propensity to migrate, but larger individuals were more... (More)
Many animal species have populations in which some individuals migrate and others remain on the breeding grounds. This phenomenon is called partial migration. Despite substantial theoretical work, empirical data on causes and consequences of partial migration remain scarce, mainly because of difficulties associated with tracking individuals over large spatial scales. We used stable hydrogen isotopes in claw material to determine whether skylarks Alauda arvensis from a single breeding population in the Netherlands had migrated or remained resident in the previous winter and investigated whether there were causes or consequences of either strategy. Age and sex had no influence on the propensity to migrate, but larger individuals were more likely to be residents. The wintering strategy was not fixed within individuals. Up to 45% of individuals measured in multiple years switched strategies. Reproductive parameters were not related to the wintering strategy, but individuals that wintered locally experienced lower future return rates, and this was directly correlated with two independent measures of immune function. Our results suggest that partial migration in skylarks is based neither on genetic dimorphism nor on an age- and sex-dependent condition. Instead, the wintering strategy is related to structural size and immune function. These new insights on causes and consequences of partial migration advance our understanding of the ecology, evolution, and coexistence of different life-history strategies. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
American Naturalist
volume
186
issue
4
pages
531 - 546
publisher
University of Chicago Press
external identifiers
  • scopus:84943754670
ISSN
0003-0147
DOI
10.1086/682667
project
CAnMove
language
English
LU publication?
no
id
afdc3940-5dac-4746-9f60-61787227a064 (old id 8228232)
date added to LUP
2015-11-23 15:14:12
date last changed
2017-09-17 03:19:34
@article{afdc3940-5dac-4746-9f60-61787227a064,
  abstract     = {Many animal species have populations in which some individuals migrate and others remain on the breeding grounds. This phenomenon is called partial migration. Despite substantial theoretical work, empirical data on causes and consequences of partial migration remain scarce, mainly because of difficulties associated with tracking individuals over large spatial scales. We used stable hydrogen isotopes in claw material to determine whether skylarks Alauda arvensis from a single breeding population in the Netherlands had migrated or remained resident in the previous winter and investigated whether there were causes or consequences of either strategy. Age and sex had no influence on the propensity to migrate, but larger individuals were more likely to be residents. The wintering strategy was not fixed within individuals. Up to 45% of individuals measured in multiple years switched strategies. Reproductive parameters were not related to the wintering strategy, but individuals that wintered locally experienced lower future return rates, and this was directly correlated with two independent measures of immune function. Our results suggest that partial migration in skylarks is based neither on genetic dimorphism nor on an age- and sex-dependent condition. Instead, the wintering strategy is related to structural size and immune function. These new insights on causes and consequences of partial migration advance our understanding of the ecology, evolution, and coexistence of different life-history strategies.},
  author       = {Hegemann, Arne and Marra, Peter P and Tieleman, B. Irene},
  issn         = {0003-0147},
  language     = {eng},
  number       = {4},
  pages        = {531--546},
  publisher    = {University of Chicago Press},
  series       = {American Naturalist},
  title        = {Causes and Consequences of Partial Migration in a Passerine Bird},
  url          = {http://dx.doi.org/10.1086/682667},
  volume       = {186},
  year         = {2015},
}