Figure 2.

Effect of hunting on auditory plasticity in adult barn owls. A, The average map shift in the OT of 12 barn owls. The three left bars represent data from a group of seven owls before prism experience, after prism experience, and after prism experience with hunting (left to right). The extreme right bar represents data from a second group of five owls exposed immediately to hunting with prisms. The maximum expected shift, based on the visual displacement of the prisms, is indicated by the horizontal line at 42.5 μs. The map shift of each individual bird is indicated for each condition (short horizontal marks). B, The map shift ± SEM that follows prism experience with and without hunting for the four birds for which both conditions were tested. The magnitude of shifts in the hunting and nonhunting conditions was correlated negatively, indicating that larger map shifts induced in the nonhunting condition decreased subsequent shifts to prisms of the opposite direction during the hunting condition (linear regression; r² = 0.94; p < 0.05).