Coordinated evolution of brain size, structure and eye size in Trinidadian killifish

Kaitlyn Howell, Shannon Beston, Sara Stearns & Matthew Walsh
Brain size, brain architecture, and eye size vary extensively in vertebrates. However, the extent to which the evolution of these components is intricately connected remains unclear. Trinidadian killifish, Anablepsoides hartii, are found in sites that differ in the presence and absence of large predatory fish. Decreased rates of predation are associated with evolutionary shifts in brain size; males from sites without predators have evolved a relatively larger brain and eye size than males from sites...
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