. 2013 Jul 11;65(4):753–764. doi: 10.1007/s00244-013-9935-z

Table 3.

Residual Pb concentrations (mg/kg dry weight [mean ± SE]) in selected organs of O. niloticus (O. n.) and M. cephalus (M. c.) (N = 8)

Organs		Site 1 (Reference site)	Site 2 (Lake Qaroun)	Site 3 (Qaroun fish farms)	P _F<
Liver	O. n.	1.60^a ± 0.15^C	36.40^a ± 2.49^A	12.75^a ± 0.76^B	0.01
	M. c.	1.02^b ± 0.09^B	9.86^b ± 0.79^A	9.23^b ± 1.15^A	0.01
	P _t<	0.01	0.01	0.05
Kidney	O. n.	1.27^a ± 0.17^C	68.44^a ± 5.26^A	50.61^a ± 5.39^B	0.01
	M. c.	0.84^b ± 0.06^B	25.15^b ± 1.94^A	29.58^b ± 4.13^A	0.01
	P _t<	0.05	0.01	0.01
Gill	O. n.	0.85^a ± 0.07^C	11.96^b ± 0.97^B	17.36^b ± 2.29^A	0.01
	M. c.	0.53^b ± 0.07^C	14.25^a ± 0.33^B	24.55^a ± 2.02^A	0.01
	P _t<	0.01	0.05	0.05
Skin	O. n.	1.34^a ± 0.17^B	14.81^a ± 1.21^A	16.17^a ± 1.48^A	0.01
	M. c.	0.48^b ± 0.08^B	8.75^b ± 1.24^A	10.50^b ± 0.79^A	0.01
	P _t<	0.01	0.01	0.01
Muscle	O. n.	0.20^a ± 0.02^B	3.76^a ± 0.98^A	2.38^a ± 0.47^A	0.01
	M. c.	0.27^a ± 0.03^B	2.25^a ± 0.12^A	1.77^a ± 0.25^A	0.01
	P _t<	NS	NS	NS

Means with the same superscript lower-case letter in the same column, and means with the same superscript capital letter in the same row, for each parameter are not significantly different. Student t test was performed between two fish species for each parameter in each site (P _t), whereas F test was performed between three locations for each organ and each fish species (P _F)