AbstractThe major food items of adult largemouth bass,Micropterus salmoides(Lacepède), in Lake Naivasha, Kenya are not markedly different from those in its native range. Although insects and their larvae are major components of the diet for both temperate and equatorial populations of juvenile bass, the equatorial population also eatsProcambarus clarkii(Girard), juvenile fish and aquatic weeds. In temperate populations they also eat crustaceans, rotifers and oligochaetes. The frequency of occurrence of the major prey organisms in the stomachs ofM. salmoidesvaries seasonally with population peaks in these organisms. Similar to North American populations, the Naivasha population feeds during the day between dawn and dusk. In contrast to temperate populations, the population ofM. salmoidesin this equatorial lake feeds throughout the year, with feeding intensity correlated with water temperature