Table 1 Frequency of occurrence (%F) and weight contribution (%W) of prey items in the diets of Pacific cod (Gadus macrocephalus) at Ayajin and hupo in the eastern coast of Korea.
Ayajin | Hupo | ||||
---|---|---|---|---|---|
Taxa | Prey items | %F | %W | %F | %W |
Nematoda | Unidentified | 5.1 | < 0.1 | 1.8 | 0.7 |
Crinoidea | Unidentified | 0.6 | 0.2 | - | - |
Polychaeta | Total | 1.1 | 1.1 | 2.7 | 2.1 |
Cirratulida sp. | 0.6 | < 0.1 | - | - | |
Flabelligeridae sp. | 0.6 | 0.5 | - | - | |
Unidentified | 0.6 | 0.6 | 2.7 | 2.1 | |
Gastropoda | Total | 1.1 | 0.6 | - | - |
Calliostoma unicum | 0.6 | < 0.1 | - | - | |
Unidentified | 0.6 | 0.6 | - | - | |
Bivalvia | Total | 1.1 | 0.4 | 1.8 | 0.1 |
Tellinidae sp. | 0.6 | < 0.1 | 1.8 | 0.1 | |
Unidentified | 0.6 | 0.4 | - | - | |
Cephalopoda | Total | 22.0 | 17.0 | 26.4 | 20.7 |
Berryteuthis magister | 1.7 | 1.7 | - | - | |
Octopus sp. | - | - | 1.8 | 1.8 | |
Sepiolidae spp. | 0.6 | 0.1 | 1.8 | 1.7 | |
Todarodes pacificus | 0.6 | 0.6 | - | - | |
Watasenia scintillans | 4.0 | 3.5 | 2.7 | 2.7 | |
Unidentified | 15.3 | 11.3 | 20.0 | 14.4 | |
Amphipoda | Total | 27.1 | 18.7 | 3.6 | 1.1 |
Anonyx sp. | 4.0 | 3.1 | - | - | |
Caprellidae spp. | 0.6 | 0.4 | - | ||
Gammaridea spp. | 1.7 | 1.1 | 0.9 | < 0.1 | |
Hyperiidae spp. | 16.9 | 11.8 | 2.7 | 1.1 | |
Lysianassidae sp. | 0.6 | 0.5 | - | - | |
Oedicerotidae sp. | 2.3 | 1.7 | - | - | |
Paraphronima gracilis | 1.1 | < 0.1 | - | - | |
Peramphithoe sp. | 0.6 | < 0.1 | - | - | |
Euphausiacea | Unidentified | 14.1 | 10.1 | 0.9 | 0.9 |
Mysidacea | Unidentified | 3.4 | 1.3 | 11.8 | 7.5 |
Caridea | Total | 7.3 | 4.9 | 30.0 | 24.8 |
Crangon hakodatei | - | - | 0.9 | 0.9 | |
Crangonidae spp. | 1.1 | 0.6 | 5.5 | 4.8 | |
Eualus middendorffi | 1.1 | 1.0 | 0.9 | 0.9 | |
Lebbeus polaris | 0.6 | 0.5 | - | - | |
Neograngon communis | 4.0 | 2.2 | 13.6 | 10.4 | |
Pandalus borealis | 0.6 | 0.6 | - | - | |
Paracrangon echinatus | - | - | 0.9 | 0.3 | |
Plesionika ortmanni | - | - | 0.9 | 0.4 | |
Spirontocaris spinus | - | - | 0.9 | 0.5 | |
Unidentified | - | - | 7.3 | 6.5 | |
Paguroidea | Total | 0.6 | 0.5 | 0.9 | 0.7 |
Pagurus trigonocheirus | 0.6 | 0.5 | - | - | |
Dardanus arrosor | - | - | 0.9 | 0.7 | |
Brachyura | Total | 1.1 | 0.2 | 1.8 | 0.9 |
Chionoecetes opilio | - | - | 0.9 | 0.8 | |
Unidentified | 1.1 | 0.2 | 0.9 | 0.2 | |
Echinoidea | Unidentified | - | - | 0.9 | 0.2 |
Ophiuroidea | Total | 1.1 | < 0.1 | - | - |
Ophiarachnella gorgonia | 1.1 | < 0.1 | - | - | |
Teleostei | Total | 46.3 | 42.4 | 44.5 | 40.4 |
Agonidae sp. | 1.7 | 1.6 | - | - | |
Arctoscopus japonicus | 8.5 | 8.3 | - | - | |
Clupea pallasii | 0.6 | 0.6 | 3.6 | 3.6 | |
Engraulis japonica | 0.6 | 0.1 | 1.8 | 1.8 | |
Gadidae spp. | 1.7 | 1.5 | - | - | |
Glyptocephalus stelleri | 0.6 | < 0.1 | - | - | |
Hypoptychus dybowskii | 1.1 | 1.1 | 0.9 | 0.9 | |
Pleuronectidae sp. | 0.6 | 0.1 | - | - | |
Unidentified | 32.2 | 29.1 | 38.2 | 34.0 | |
Other materials | Unidentified | 5.6 | 2.4 | 0.0 | 0.0 |