The evolutionary stability of partial migration under different forms of competition

Partial migration is a unique form of phenotypic diversity wherein migrant and non-migrant individuals coexist together in a population. Recent research has shown that the partial migration can be an evolutionarily stable strategy (ESS) and convergent stable strategy (CSS) if migrants and non-migran...

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Bibliographic Details
Published in:Theoretical ecology 2019-09, Vol.12 (3), p.347-363
Main Authors: Ohms, H. A., Mohapatra, A., Lytle, D. A., De Leenheer, P.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Competition
Evolution
Evolutionarily stable strategy
Life Sciences
Migrants
Migration
Migratory species
Original Paper
Phenotypes
Plant Sciences
Reproduction (biology)
Theoretical Ecology/Statistics
Zoology
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Summary:Partial migration is a unique form of phenotypic diversity wherein migrant and non-migrant individuals coexist together in a population. Recent research has shown that the partial migration can be an evolutionarily stable strategy (ESS) and convergent stable strategy (CSS) if migrants and non-migrants experience density-dependent competition among individuals of the same type during reproduction. However, not all partially migratory species experience this particular form of competition during reproduction. In this paper, we investigate how various degrees of competition between migrants and non-migrants influence whether or not partial migration is an ESS and CSS. We find that the degree of competition influences the evolutionary outcome of partial migration and provides sharp thresholds relating these degrees of competition to the carrying capacities of both phenotypes.
ISSN:1874-1738
1874-1746
DOI:10.1007/s12080-018-0400-5