All of the common consumers (6 species of crustaceans and 10 species of fishes) of a representative Hawaiian estuary were included in a study to determine the types, amounts, and sources of foods eaten by estuarine macrofauna. Stomachs of 2,146 specimens, collected by seining seven
sites on 42 dates, were examined and the material they contained was arranged into eight trophically ordered food groups. Consumers were ranked on a trophic scale of 1 (lowest herbivore) to 10 (highest carnivore) based on the proportions of each food group they ate. Community trophic relations
were described by integrating diets of species and populations in trophic spectra (modified from Darnell, 1961). Comparisons showed that the community contained three high carnivores, three herbivore-detritivores, and 10 omnivores; most of the total community food was consumed by Eleotris
sandwicensis and Mugil cephalus, as indicated by their predominant population biomasses. Detritus and benthic invertebrates were the foods eaten in greatest amounts by the community. Differences in diets of a consumer with size class and capture location were demonstrated.
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