Figure 1 . Differing species responses to fishing pressure observed from the Pacific study islands. Many species have declined in size with growing human presence, or fishing pressure, such as the unicornfish Naso unicornis (a). In contrast, species like the steephead parrotfish Chlorurus microrhinos have declined more in terms of their proportional contribution to landings than their size structure (b). These differing responses result in distinct catch-frequency histograms when snapshot studies are conducted (c).