Abstract
On a purpose to study foods of the sardines, samples were collected from the fishes caught by purse-seines in the eaters adjacent to the west coast of Kyushu from the beginning of 1954 to the end of 1956 and measurements were made with them on stomach content, body weight, body length, fat coritent, condition coefficient, and gonad weight. Six classes were settled as the biomass ratios of phytoplankton and zooplankton of the stomachs of the sardines and as its results the successior of the foods of the sardines with growth from zooplankton to phytoplankton was observed with the samples caught in Goto Nada, while large sardines fished in the waters north-west of the Goto Islands in spring fed mainly on zooplankton and seem to be individuals after spawning with high fat content, condition coefficient, and low gonad weight. For the latter sardines, zooplankton are important food items for recovering after spawning at least in the waters north-west of the Goto Islands.
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