Table 1.

The growth of algal strains, expressed as cell count (number of cells ×10⁶/mL), under unlimitation and P-limitation conditions with the addition of malathion.

Algal strains	A. oryzae	N. muscorum	S. platensis
Unlimitation	24.7 ± 2.9	6.6 ± 0.5	8.8 ± 0.1
P-limitation	1.2 ± 0.3a	1.4 ± 0.2a	4.2 ± 0.4a
P-limitation with different concentrations of malathion (ppm)
0.02	4.4 ± 0.5b	2.1 ± 0.3b	6.4 ± 1.1b
0.2	5.4 ± 1.2b	4.3 ± 0.3b	7.0 ± 0.9b
2	5.6 ± 0.6b	4.8 ± 0.5b	7.2 ± 0.9b
20	13.4 ± 0.6b	4.9 ± 0.2b	7.8 ± 0.7b
50	22.6 ± 0.8b	7.1 ± 0.1b	8.2 ± 0.7b
100	26.1 ± 2.4b	7.6 ± 0.5b	0.0 ± 0.0b

Values are means of three replicates ± standard errors.

^aSignificant decrease compared with unlimitation condition.

^bSignificant increase compared with P-limitation condition.