Are Fish and Standardized FETAX Assays Protective Enough for Amphibians? A Case Study on Xenopus laevis Larvae Assay with Biologically Active Substances Present in Livestock Wastes

Table 1

Nominal concentrations (mg/L) of the four salts of metal, used as water-soluble forms, and the corresponding nominal concentrations (mg/L) of the four metals considered in the current study.

Water-soluble form		Metal
	Concentration		Concentration
Zinc sulphate 7-hydrate	6	Zinc	1.36
	12		2.73
	24		5.46
	48		10.91
	96		21.83
Copper II chloride 2-hydrate	0.6	Copper	0.22
	1.2		0.45
	2.4		0.89
	4.8		1.79
	9.6		3.58
Manganese II sulfate monohydrate	3.75	Manganese	1.22
	7.5		2.44
	15		4.88
	30		9.75
	60		19.50
Sodium selenite 5-hydrate	1.56	Selenium	0.47
	3.12		0.94
	6.25		1.88
	12.5		3.75
	25		7.51