Data from: Exposure to predators does not lead to the evolution of larger brains in experimental populations of threespine stickleback

Kieran Samuk, Jan Xue, Diana Jessie Rennison & Diana J. Rennision
Natural selection is often invoked to explain differences in brain size among vertebrates. However, the particular agents of selection that shape brain size variation remain obscure. Recent studies suggest that predators may select for larger brains because increased cognitive and sensory abilities allow prey to better elude predators. Yet, there is little direct evidence that exposure to predators causes the evolution of larger brains in prey species. We experimentally tested this prediction by exposing families...
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