Frequency and Density-Dependent Selection in Bank Voles
Author Information
Author(s): Mappes Tapio, Koivula Minna, Koskela Esa, Oksanen Tuula A., Savolainen Tiina, Sinervo Barry
Primary Institution: University of Jyväskylä
Hypothesis
We hypothesize that density- and negative frequency-dependent selection may promote genetic variability in cyclic mammal populations.
Conclusion
The study shows that low reproductive effort females are favored in low densities, while high reproductive effort females succeed when they are rare in high densities.
Supporting Evidence
- Females with low reproductive effort were favored at low density.
- High reproductive effort females were most successful when they were rare in the population.
- The frequency of high reproductive effort tactics increased significantly when densities were high.
Takeaway
In a study of bank voles, we found that different breeding strategies work better depending on how many of each type are around and how many voles there are overall.
Methodology
The study involved manipulating the frequencies and densities of reproductive effort tactics in bank voles and monitoring their breeding success.
Limitations
The study was limited by the escape of individuals from two enclosures before the end of the experiment.
Participant Demographics
The study focused on female bank voles (Myodes glareolus) with varying reproductive efforts.
Statistical Information
P-Value
0.009
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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