species	conc	dead	n
A	0.14	7	30
A	0.34	18	30
A	0.48	20	30
A	1.4	24	30
A	3.4	26	30
A	5.5	30	30
B	0.14	0	30
B	0.34	3	30
B	0.48	6	30
B	1.4	10	30
B	3.4	18	30
B	5.5	27	30
