Fig. 1.

Stomach contents (main taxa as percentage of stomach volume) of lake trout, rainbow trout, bull trout, and cisco from Moab Lake in 1979 (17), 1993, 2001, and 2003 (n = 1–26). In lake trout stomachs, both rainbow trout (1993/2003) and cisco (2003) were identified; in rainbow trout, bull trout, and cisco stomachs, the species of prey fish was rainbow trout/unidentifiable. Crustaceans included Daphnia (which were only present in cisco), Amphipoda, and Mysis; insects included Odonata, Trichoptera, Diptera, Ephemeroptera, and Hemiptera; molluscs included Pelecypoda and Gastropoda; and other included terrestrial items such as adult insects, ants, spiders, semiaquatic mammals, and unidentifiable matter.