Table 6.

Toxicity of bottom sediments to Vibrio fischeri and Heterocypris incongruens

Parameters	V. fischeri	H. incongruens		Toxicity evaluation
	Luminescence inhibition	Mortality	Growth inhibition	V. fischeri	H. incongruens
	Percent effect PE%			% samples
Mean	78	14	51	Non-toxica—0	Non-toxic—12
Median	82	–	53	Slightly toxic—4	Slightly toxic—44
SD	18	31	26	Toxic—94	Toxic—38
Minimum	46	0	10	Highly toxic—2	Highly toxic—6
Maximum	100	100	100
CV%	23	–	50

^aNon–toxic, PE <20 %; slightly toxic, 20 % ≤ PE < 50 %; toxic, 50 % ≤ PE < 100 %; highly toxic, PE = 100 %