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Anim Behav. 2013 Oct;86(4):e4-e6.

The benefit of evolving a larger brain: big-brained guppies perform better in a cognitive task.

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Animal Ecology, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden.


•We previously selected for large and small brain size in guppies.•Large-brained females outperformed small-brained females in a learning task.•Healy and Rowe challenged our interpretations of larger brains = better learning.•Here we argue why we think they are mistaken.


Poecilia reticulata; artificial selection; brain size; cognition; guppy; learning

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