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).