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.

From: Combined stomach content and stable isotope analyses revealed variations in trophic ecology of pacific cod in the east sea

  

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