Feeding Ecology of Salton Sea Tilapia (Oreochromis spp.).

Abstract.--We investigated the feeding ecology of tilapia (Oreochromis spp) in the Salton Sea. Stomachs and intestines were sampled at each season. Fish foraged at the surface during the summer when dissolved oxygen was depressed The proportion of plant materials in fish stomachs was higher at river cavity between the jaws areas. Diatoms dominated the phytoplankton: rotifers were dominant during the spring and summer; copepod were dominant during the fall; barnacle larvae dominant during the winter. Pile worms (Neanthes succinea) were near throughout the year. Feeding activity was reduc in the