Measured Copper Toxicity to Cnesterodon decemmaculatus (Pisces: Poeciliidae) and Predicted by Biotic Ligand Model in Pilcomayo River Water: A Step for a Cross-Fish-Species Extrapolation

Table 2

Seasonal descriptive statistics and 𝑑𝑚 statistic values (difference between season’s means) of hydrological and water quality parameters of the Pilcomayo River at Misión La Paz, Argentina (data provided by the Comisión Trinacional del Río Pilcomayo).

		Q	pH	T	TSS	TDS	Ca	Mg	SO4	Alk	Cl	Na	K	DOC	T·Cu	P·Cu	D·Cu
		m^3 s^−1	UpH	°C	mg L^−1	mg L^−1	mg L^−1	mg L^−1	mg L^−1	Mg CaCO3 L^−1	mg L^−1	mg L^−1	mg L^−1	mg L^−1	mg L^−1	μg kg^−1	mg L^−1
Sampling date (May 2009)		75.20	7.67	21.43	1637	517	73.33	30.5	207.3	110	101	65.2	5.1	4.4	0.07	0.07	0.001
Dry season	n	14	14	11	13	11	14	14	12	12	12	14	14	6	13	12	14
	Mean	57.18	7.87	17.54	1582.95	845.7	80.6	35.22	292.09	126.43	164.91	125.97	6.6	5.27	0.05	61.30	0.0027
	Median	53.22	7.91	16.9	1147	847	79	37.75	278	121.5	187.5	120.5	6.55	5.06	0.03	34.37	0.002
	Max	161.2	8.1	25.8	8181	1114	150.2	52	399.7	210	243	207	12	10.8	0.18	232.75	0.0067
	Min	6.45	7.31	11.8	92	517	44	9.4	190	91	45	70	3.2	2.2	0.01	11.43	0.001
	Std	41.40	0.20	4.36	2178.71	211.85	28.64	11.05	71.02	30.39	61.53	43.06	2.29	3.09	0.04	72.5	0.001
Wet season	n	13	13	8	10	13	13	10	11	11	11	13	13		12	9	13
	Mean	248.4	7.70	25.35	14760.2	469.46	51.67	17.35	149.09	108.71	56.85	48.88	5.69		0.16	26.58	0.0025
	Median	219.07	7.65	27.15	8990.5	436	44	14.5	135	100	32	36	5		0.11	24.93	0.0012
	Max	712.77	8.33	28.2	53960	1168	91	36	376	182	268	131	9.9		0.458	53.78	0.01
	Min	6.65	7.27	17.7	240	170	19	3.4	59	57.6	20	18	3.2		0.026	2.724	0.0009
	Std	195.22	0.27	3.68	17298.53	255.60	23	10.01	87.87	33.07	71.45	31.33	2.38		0.15	18.75	0.002
𝑑𝑚		−3.8	1.88	−4.36	−2.49	4.07	3.09	4.38	4.53	1.41	4.04	5.79	1.07		−2.70	1.73	0.14