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Reproductive effort in viscous populations.
1Department of Genetics, University of Groningen, Haren, The Netherlands. penir@biol.rug.nl
Evolution; International Journal of Organic Evolution
|August 11, 2000
Summary
This study shows that as offspring dispersal increases, the evolutionarily stable reproductive effort decreases. Higher dispersal reduces competition among relatives, making offspring less valuable and lowering resource allocation to reproduction.
Area of Science:
- Evolutionary biology
- Population genetics
- Behavioral ecology
Background:
- Reproductive effort, balancing fecundity and survival, is a key life-history trait.
- Patch structure and offspring dispersal significantly influence kin competition and social evolution.
Purpose of the Study:
- To investigate the evolutionarily stable reproductive effort in a kin selection model.
- To analyze the impact of offspring dispersal rate on resource allocation between fecundity and survival.
Main Methods:
- Developed a kin selection model for reproductive effort.
- Incorporated a patch-structured population with costly, partial long-distance dispersal.
- Analyzed competition for breeding sites.
Main Results:
- The evolutionarily stable reproductive effort decreases as the offspring dispersal rate increases.
- Increased dispersal reduces competition between juveniles and their relatives.
- This leads to a lower evolutionarily stable allocation to fecundity.
Conclusions:
- Offspring dispersal rate is a critical factor shaping reproductive strategies.
- Asymmetry in kin competition between adults and juveniles is modulated by dispersal.
- Models of reproductive effort must account for population structure and dispersal patterns.