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Table 2 Abundance (mean ± SD), relative abundance (RA) and occurrence ratio (OR) of each mesozooplankton group recorded on cruise ORII-CR488 (2–3/September/1998)

From: Mesozooplankton and copepod community structures in the southern East China Sea: the status during the monsoonal transition period in September

Group

Abundance (individuals m−3)

RA (%)

OR (%)

Medusae

3.2 ± 5.85

0.43

62.5

Polychaeta

1.45 ± 2.97

0.19

50.0

Sagitta spp.

70.23 ± 49.6

9.44

100.0

Cladocera

0.64 ± 1.49

0.09

25.0

Ostracoda

0.61 ± 1.48

0.08

37.5

Copepod nauplii

0.03 ± 0.08

0.00

12.5

Calanoida

493.74 ± 450.54

66.36

100.0

Cyclopoida

0.56 ± 1.49

0.07

25.0

Harpacticoida

0.03 ± 0.08

0.00

12.5

Poecilostomatoida

23.61 ± 27.49

3.17

100.0

Amphipoda

22.32 ± 55.57

3.00

50.0

Lucifer larvae

12.71 ± 12.74

1.71

87.5

Euphausiacea

0.82 ± 1.22

0.11

37.5

Mysidacea

1.99 ± 3.01

0.27

50.0

Other Decapoda

49.45 ± 77.32

6.65

75.0

Pteropoda

21.47 ± 15.43

2.89

100.0

Echinoderm larvae

0.75 ± 1.3

0.10

37.5

Appendicularia

8.34 ± 13.23

1.12

75.0

Thaliacea

11.24 ± 8.4

1.51

100.0

Fish eggs

1.17 ± 1.62

0.16

50.0

Fish larvae

1.29 ± 1.6

0.17

50.0

Other larvae

18.38 ± 28.31

2.47

87.5