Migratory Bats Have Smaller Brains Than Sedentary Bats
Author Information
Author(s): Liam P. McGuire, John M. Ratcliffe
Primary Institution: University of Western Ontario
Hypothesis
Do migratory bats have smaller brains and neocortex volumes compared to sedentary species?
Conclusion
Migratory bats have smaller brains and neocortices than sedentary species, supporting the energy trade-off hypothesis.
Supporting Evidence
- Migratory bats had relatively smaller brains and neocortices than sedentary species.
- Relative hippocampus size did not differ between migratory and sedentary bats.
- Brain size differences in bats are subtler than those found in birds.
Takeaway
Bats that migrate have smaller brains than bats that stay in one place because big brains use a lot of energy, which is hard to manage when flying long distances.
Methodology
Compared brain, neocortex, and hippocampus volumes between migratory and sedentary bats using phylogenetically independent contrasts.
Potential Biases
Sedentary species were difficult to identify, potentially leading to misclassification.
Limitations
The study may underestimate the number of migratory and sedentary bat species due to historical understudying of bat migration.
Participant Demographics
342 bat species were included in the study.
Statistical Information
P-Value
0.027
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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