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Table 1 Comparison of zooplankton abundance, biovolume, and slopes ( a ) and ( b ) of NBSS ( Y = aX + b ) of each group

From: Spatial and temporal changes in zooplankton abundance, biovolume, and size spectra in the neighboring waters of Japan: analyses using an optical plankton counter

  Group One-way ANOVA Fisher's PLSD
Parameter A(20) B1(7) B2(17) B3(12) C(14) D(7)  
Abundance (inds. m-3)              
Total 331 503 476 528 469 101 ** D A C B2 B1 B3
0.25 to 1 mm 315 465 441 473 387 98 ** D A C B2 B1 B3
1 to 2 mm 15.1 34.0 32.3 48.5 52.3 2.9 *** D A B1 B2 B3 C
2 to 3 mm 1.1 2.1 2.4 6.2 28.3 0.1 *** D A B1 B2 B3 C
3 to 4 mm 0.2 0.8 0.4 0.7 1.5 0.0 ** D A B2 B3 B1 C
4 to 5 mm 0.0 0.5 0.1 0.2 0.2 0.0 *** D A B2 C B3 B1
Biovolume (mm3m−3)              
Total 57.0 ± 13.8 135.1 ± 34.1 106.7 ± 39.3 179.6 ± 44.7 348.7 ± 229.1 10.7 ± 7.5 *** D A B2 B1 B3 C
0.25 to 1 mm 25.7 ± 11.9 43.9 ± 30.9 39.3 ± 13.9 49.6 ± 21.5 41.3 ± 27.5 6.5 ± 4.7 *** D A B2 C B1 B3
1 to 2 mm 18.6 ± 7.1 37.0 ± 17.3 39.0 ± 9.6 66.9 ± 16.9 88.7 ± 46.2 3.3 ± 2.2 *** D A B1 B2 B3 C
2 to 3 mm 7.7 ± 4.1 14.5 ± 12.8 16.5 ± 6.1 41.5 ± 12.1 181.4 ± 160.9 1.0 ± 0.9 *** D A B1 B2 B3 C
3 to 4 mm 3.9 ± 4.1 16.5 ± 10.9 8.5 ± 7.5 13.9 ± 9.1 30.5 ± 42.7 0 ** D A B2 B3 B1 C
4 to 5 mm 1.1 ± 1.6 23.3 ± 24.1 3.5 ± 4.3 7.7 ± 9.9 6.7 ± 9.0 0 *** D A B2 C B3 B1
NBSS              
Slope (a) −1.18 ± 0.14 −1.11 ± 0.16 −119 ± 0.94 −1.16 ± 0.94 −0.90 ± 0.16 −1.24 ± 0.11 ** D B2 A B3 B1 C
Intercept (b) −0.23 ± 0.28 −0.06 ± 0.32 −0.04 ± 0.16 0.09 ± 0.27 0.29 ± 0.29 −0.65 ± 0.29 *** D A B1 B2 B3 C
  1. Identified by Q-mode analysis (cf. Figure 5A) in the Western Pacific and their adjacent seas during May and June to August 2011. Differences between the group were tested by one-way ANOVA and post hoc test by Fisher's PLSD. Groups with bold letters indicate that the groups are significantly greater than the other groups (p < 0.05). Values are mean ± s.d. Numbers in the parentheses are the numbers of stations belonging to each group. **p < 0.01, ***p < 0.0001.