(a) under high high predation In ponds with predatory fishes the head region of the mosquito fish is streamlined and the tail region is powerful, enabling rapid bursts of speed
(b) Under low predation In ponds without predatory fishes, mosquito fish have a different body shape that favors long, steady swimming
A Figure 24.7 Reproductive isolation as a by-product of selection. After bringing together mosquitofish from different ponds, researchers concluded that selection for traits that enable mosquitofish high-predation ponds to avoid predators has isolated them reproductively from mosquitofish in low-predation ponds