Zoological Studies

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

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.

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