抄録
Stomach contents of the macrourid fish Caelorinchus anatirostris Jordan and Gilbert, 1904, collected by a series of beam trawl surveys southwest of Nagasaki, Japan, were analyzed to obtain ecological information on these slope-dwelling fish. The index of relative importance(%IRI)of polychaetes was, on the whole, high for all specimens. The %IRI of crustaceans(copepods and amphipods)was high for small specimens(under 69 mm in pre-anal length), while that for fish(Myctophidae gen. sp., Bregmaceros spp., and others)was highest for large specimens(over 112 mm in pre-anal length). Both crustaceans and fish were found in the stomachs of middle specimens(69–112 mm in pre-anal length). These results indicate ontogenetic changes in the diet of C. anatirostris. No significant difference in stomach contents according to sex or day-night timing of capture was detected.
