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On the evolutionary stability of partial migration.

Lundberg, Per LU (2013) In Journal of Theoretical Biology 321. p.36-39
Abstract
The evolution of partial migration in birds is typically assumed to be the result of an optimization process. The fitness rewards for individuals choosing to migrate are balanced against the rewards of remaining in the breeding area all year around. This balancing is often thought to result in an evolutionarily stable strategy (ESS) such that an optimal fraction of the population becomes migratory through adaptive evolution. Here I show that this solution can indeed be reached through adaptive evolution, but that the equilibrium is a neutral or "weak" ESS. The equilibrium fraction of migrants is more reminiscent of the Fisherian sex ratio. I also show that this individual-based evolutionary solution may deviate significantly from the... (More)
The evolution of partial migration in birds is typically assumed to be the result of an optimization process. The fitness rewards for individuals choosing to migrate are balanced against the rewards of remaining in the breeding area all year around. This balancing is often thought to result in an evolutionarily stable strategy (ESS) such that an optimal fraction of the population becomes migratory through adaptive evolution. Here I show that this solution can indeed be reached through adaptive evolution, but that the equilibrium is a neutral or "weak" ESS. The equilibrium fraction of migrants is more reminiscent of the Fisherian sex ratio. I also show that this individual-based evolutionary solution may deviate significantly from the optimal solution for the population (maximum population size), quite in line with previous findings. Finally, I show that partial migration is very unlikely without density- or frequency-dependent selection. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Partial migration, Evolution, Frequency-dependence, Density-dependence, ESS
in
Journal of Theoretical Biology
volume
321
pages
36 - 39
publisher
Academic Press
external identifiers
  • wos:000320216000004
  • pmid:23306057
  • scopus:84873870397
  • pmid:23306057
ISSN
1095-8541
DOI
10.1016/j.jtbi.2012.12.017
language
English
LU publication?
yes
id
efa47e51-9c9e-4a6a-a7c0-cbf61bd16993 (old id 3438866)
date added to LUP
2016-04-01 10:21:24
date last changed
2021-01-04 19:16:42
@article{efa47e51-9c9e-4a6a-a7c0-cbf61bd16993,
  abstract     = {The evolution of partial migration in birds is typically assumed to be the result of an optimization process. The fitness rewards for individuals choosing to migrate are balanced against the rewards of remaining in the breeding area all year around. This balancing is often thought to result in an evolutionarily stable strategy (ESS) such that an optimal fraction of the population becomes migratory through adaptive evolution. Here I show that this solution can indeed be reached through adaptive evolution, but that the equilibrium is a neutral or "weak" ESS. The equilibrium fraction of migrants is more reminiscent of the Fisherian sex ratio. I also show that this individual-based evolutionary solution may deviate significantly from the optimal solution for the population (maximum population size), quite in line with previous findings. Finally, I show that partial migration is very unlikely without density- or frequency-dependent selection.},
  author       = {Lundberg, Per},
  issn         = {1095-8541},
  language     = {eng},
  pages        = {36--39},
  publisher    = {Academic Press},
  series       = {Journal of Theoretical Biology},
  title        = {On the evolutionary stability of partial migration.},
  url          = {http://dx.doi.org/10.1016/j.jtbi.2012.12.017},
  doi          = {10.1016/j.jtbi.2012.12.017},
  volume       = {321},
  year         = {2013},
}