Acute and Chronic Toxicity of Soluble Fractions of Industrial Solid Wastes on Daphnia magna and Vibrio fischeri

Table 4

Effects on reproduction, longevity and growth of Daphnia magna exposed to soluble fractions of metal-mechanic waste, samples MM1, MM2, and MM3, during 21 days. Results are expressed as means ± standard deviation.

Sample	Concentration (%)	Reproduction: no. neonates/broods	Longevity: no. survivors	Growth: length (mm)
MM1	Control	18.98±2.58	10±0.0	3.7±0.48
	0.52	22.45±3.29	9±0.32	3.83±0.41
	0.78	20.09±4.69	8±0.42	3.87±0.35
	1.04	24.53±3.96^a	9±0.32	4±0.0
	1.56	23.77±4.34^a	10±0.0	4±0.0
MM2	Control	15.34±3.30	10±0.0	3.95±0.16
	6.25	16.37±3.65	10±0.0	3.8±0.26
	12.5	20.11±5.19	10±0.0	3.85±0.24
	25	27.49±9.31^a	10±0.0	3.9±0.21
	50	2.66±2.08^a	10±0.0	3.65±0.34^a
MM3	Control	16.23±2.58	10±0.0	3.85±0.24
	0.52	20.41±3.41^a	9±0.32	3.93±0.19
	0.78	22.18±2.98^a	8±0.42	3.94±0.32
	1.04	27.56±1.99^a	10±0.0	3.94±0.17
	1.56	26.21±2.77^a	9±0.32	4.21±0.27^a

^a Values which differ significantly from control (𝑃<0.05).