Resource Use among Six Commercial Fish Species from the South-Eastern Gill Net Fisheries, Korea

Dietary habits and inter-specific differences in resource use among six commercial fish species, Chelidonichthys spinosus, Cleisthenes pinetorum, Glyptocephalus stelleri, Hexagrammos otakii, Lophius litulon, Sebastes schlegelii, collected from the southern coast of East Sea, Korea, were analyzed using stomach content stable isotope analyses. Teleosts main prey items for C. pinetorum L. while both crabs teleosts contributed to diets spinosus S. schlegelii. stelleri mainly consumed polycheates carid shrimps, H. otakii mostly ingested crabs. The composition was significantly different species. Further, carbon (δ13C) nitrogen (δ15N) values indicating trophic positions. schlegelii had narrow niches, whereas G. relatively wider niches. This study demonstrated patterns food species that categorized into two according their items: diet diversity, niche width, position. These results could contribute understanding relationships inhabiting Korea.