Island Selection and Offspring Size in Bank Voles
Author Information
Author(s): Mappes Tapio, Grapputo Alessandro, Hakkarainen Harri, Huhta Esa, Koskela Esa, Saunanen Raimo, Suorsa Petri
Primary Institution: Centre of Excellence in Evolutionary Research, University of Jyväskylä
Hypothesis
Does selection for reproductive tactics differ in insular environments, causing genetic differentiation of insular populations from mainland ones?
Conclusion
Larger offspring size in island populations of bank voles may be a result of different selection pressures compared to mainland populations.
Supporting Evidence
- Island bank voles produced larger offspring than mainland bank voles.
- Genetic differentiation in offspring size was confirmed through quantitative genetics analyses.
- Additive genetic variation for offspring size was lower in island populations compared to mainland populations.
Takeaway
On islands, baby bank voles are bigger than those on the mainland because the island environment makes it better for them to be larger.
Methodology
The study involved capturing and analyzing bank voles from both island and mainland populations to compare offspring size and genetic traits.
Potential Biases
Potential biases may arise from the limited number of individuals sampled from each location.
Limitations
The study was limited by the small size of the islands and the low variation in island characteristics.
Participant Demographics
The study focused on bank voles from 37 islands and 20 mainland localities in central Finland.
Statistical Information
P-Value
0.044
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website