Table 3.

Toxicity (24-h LC50) of MCs or MCs and ANTX containing cyanobacterial extracts to B. calyciflorus and D. pulex, determined on the base of cyanobacterial Chl-a concentration used as the equivalent of the cyanobacterial biomass

Extract code	LC50 expressed as mg Chl-a/L
	Brachionus calyciflorus	Daphnia pulex
A	n.d.	n.d.
B	n.d.	0.475 ± 0.053
C	0.587 ± 0.039	2.433 ± 0.231
D	n.d.	n.d.
E	0.774 ± 0.040	1.234 ± 0.207

n.d. not determined within the extract concentration range used

Data are expressed as means ± 95% confidence intervals