Table 2. Results of praziquantel (PZQ) in the tested matrices in the course of the experiment.

Day	Water (μg/l)	Plasma (μg/l)	Hepatopancreas (μg/kg)	Kidney (μg/kg)	Muscle (μg/kg)	Gill (μg/kg)	Skin (μg/kg)
0	< 0.19*c	< 1.9*d	< 0.53*c	< 0.63*b	< 0.46*c	< 0.75*c	< 0.55*c
1	790.3 ± 36.2 (772.0)a	1 368.6 ± 208.1 (1 380.0)a	4 318.6 ± 2 455.0 (3 250.0)a	1 947.1 ± 636.6 (1 720.0)a	709.4 ± 273.2 (716.0)a	2 327.1 ± 647.2 (2 400.0)a	2 332.9 ± 377.1 (2 220.0)a
2	723.3 ± 68.9 (739.0)ab	1281.1 ± 275.6 (1 280.0)ab	2 742.9 ± 1 614.6 (2 130.0)ab	1 535.7 ± 124.2 (1 480.0)a	607.3 ± 118.3 (663.0)ab	2 114.3 ± 654.3 (2 090.0)a	1 784.3 ± 221.5 (1 890.0)b
3	689.7 ± 72.9 (668.0)ab	1 086.0 ± 184.2 (1 000.0)b	1 947.1 ± 335.9 (1 850.0)b	1 467.1 ± 438.2 (1 320.0)a	645.0 ± 231.7 (556.0)ab	2 222.9 ± 496.6 (2 370.0)a	1 571.4 ± 192.0 (1 480.0)b
4	638.0 ± 32.2 (624.0)b	789.9 ± 168.8 (734.0)c	2 162.9 ± 331.1 (2 240.0)b	1 482.9 ± 580.6 (1 470.0)a	433.9 ± 110.6 (413.0)b	1 391.9 ± 344.9 (1 560.0)b	1 544.3 ± 357.3 (1 500.0)b
10	18.0 ± 2.6 (17.7)c	29.3 ± 4.8 (27.7)d	50.9 ± 6.5 (47.9)c	32.1 ± 7.9 (30.7)b	20.6 ± 6.5 (17.5)c	46.3 ± 29.1 (30.5)c	28.8 ± 3.4 (27.6)c
16	4.3 ± 0.8 (3.9)c	5.6 ± 1.5 (5.7)c	14.2 ± 4.1 (13.3)c	< 0.63*b	3.7 ± 1.0 (3.4)c	< 0.75*c	< 0.55*c
23	0.5 ± 0.1 (0.4)c	< 1.9*d	1.9 ± 1.3 (2.0)c	< 0.63*b	< 0.46*c	< 0.75*c	< 0.55*c
30	0.6 ± 0.2 (0.7)c	< 1.9*d	1.5 ± 0.5 (1.3)c†	< 0.63*b	< 0.46*c	< 0.75*c	< 0.55*c

^a–dStatistically significant differences in the concentrations between the sampling days are indicated by different alphabetic superscript letters (P < 0.05); Data are presented as the mean ± standard deviation; the median value is given in the brackets; *Results were below the limit of detection, half of this particular limit of detection was used for the statistical analysis; ^†Descriptive characteristics were calculated only from the positive samples