Read the Paper by Kotrschal and Colleagues (2013), "Artificial Selection

Essay

Read the paper by Kotrschal and colleagues (2013), "Artificial Selection on Relative Brain Size in the Guppy Reveals Costs and Benefits of Evolving a Larger Brain" (Current Biology, 23, 1-4). Describe the artificial selection procedure and the major behavioral and morphological differences between the small-brained and large-brained guppy lines. How do these data relate to the "expensive-tissue hypothesis"? Expand upon why it is important to consider functional trade-offs when studying the evolution of learning.