Environmental Sciences Europe

Table 5 Malformation rates at 96 hpf for main and additional sampling sites with three runs per time point

From: The importance of sediments in ecological quality assessment of stream headwaters: embryotoxicity along the Nidda River and its tributaries in Central Hesse, Germany

	Malformation rate (%)
	July 15			November 15			January 16–April 16			July 16
Control (N)	0	0	0	0	0	0	0	0	0	0	0	0
N1	2.42	0	7.14*	15.52*	12.10*	16.67*	2.0	12.10*	0.93	1.19	10.48*	0
N2	3.13	0	5.36*	3.57	7.26*	8.62*	1.85	0	0	15.74*	9.68*	1.56
N3	10.15	4.03	9.38*	6.25*	0.86	6.25*	9.00*	9.68*	1.67	11.11*	0	3.13
N4	0	2.34	0	3.91	2.68	0.83	9.52*	0	0.78	1.61	0.78	0
N5	0	0	3.23	7.03*	2.50	1.61	4.46	3.45	1.72	2.42	3.45	0
N6	3.23	0	7.81*	3.33	6.45*	3.13	3.85	0	0	2.34	0	0
Control (H)	0	0	0.78	0	0	0	1.56	0	0	0	0	0
H1	6.25	3.91	6.25	3.70	3.33	0	0.78	0	0	3.91	7.81*	3.13
H2	4.84	5.47	0	4.17	5.56	2.78	20.24*	0	8.33*	2.34	1.61	0.78
H3	2.42	13.79	21.0	0	0.83	0	0	0	0.81	2.50	3.45	9.17*
H4	0.81	0.78	0	0	0	0	0	2.34	10.94*	5.47	1.61	4.69
Control (U)	0	0	0	0	0	0	0	1.56	0	0	0	0
U1	3.70	1.61	3.13	0	0.93	0	0	0	0	0.78	4.69	0.81
U2	0	0	0.78	0	0	0.83	4.84	3.57	6.67	3.23	1.56	0.78
U3	15.74*	4.63	1.56	10.42*	1.61	4.31	2.50	0	0	3.91	6.25	3.13
U4	1.56	2.42	2.34	0.89	0	0.93	2.34	0	0	2.34	2.34	3.13

	March 17			June 17			September 17
Control (N)	0	0	0	0	0	0	0	0	0
N1	2.08	0	0	2.17	0	2.08	0	0	0
N2.1	0	0	0	3.13	1.04	6.52	0	0	0
N2.2	0	0	0	1.04	3.13	0	0	0	1.14
N2.3	0	0	0	5.21	4.17	2.08	0	1.09	7.14*
N2.4	1.04	0	0	0	2.08	0	1.25	0	0
Control (H2)	0	0	0	0	0	0	0	0	0
H1	1.09	3.13	0	6.25	0	0	2.38	1.04	0
H2	0	1.04	1.04	0	0	0	0	0	3.13
H2-DE	2.34	0	1.04	0	0	0	1.04	3.13	2.08
H2-F	1.56	9.78*	1.04	13.54*	4.17	5.43	0	7.61	0
H2-B	21.09*	25.00*	20.83*	16.30*	14.58*	23.96*	4.17	3.26	1.04
H2.1	2.08	0	3.13	2.27	0	3.13	0	1.09	0
H2.2	5.21	1.09	7.29	2.08	0	0	0	0	1.0
H2.3	8.33*	4.17	1.04	0	0	2.08	0	1.04	0
Control (H2a)	0	0	0	0	0	0	1.47	0	1.32
H2a oh	3.13	0	0	3.57	3.13	5.43	2.63	0	0
H2a-DE	0.78	1.04	0	0	4.17	1.04	1.19	0	0
H2a uh1	3.13	0	0	4.17	5.21	3.13	0	25.00*	0
H2a uh2	11.96*	3.13	1.04	0	0	0	7.81	0	13.75*
H2a uh3	1.09	9.38*	0	4.17	0	0	0	21.25*	2.38
H2a uh4	0	1.04	0	0	0	0	0	18.75*	0

* Significant differences to control treatments; likelihood ratio χ², Fisher’s exact test (p < 0.05), correction with sequential Bonferroni–Holm method p < α

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