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

Table 5.

Residual Mn 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.	1.87^a ± 0.31^C	8.20^a ± 0.32^A	5.85^a ± 0.46^B	0.01
	M. c.	1.37^a ± 0.10^B	4.42^b ± 0.38^A	5.07^a ± 0.46^A	0.01
	P _t<	NS	0.01	NS
Kidney	O. n.	1.55^b ± 0.22^B	19.05^a ± 1.58^A	15.92^a ± 1.32^A	0.01
	M. c.	2.29^a ± 0.08^B	16.78^a ± 3.15^A	6.82^b ± 0.25^B	0.01
	P _t<	0.01	NS	0.01
Gill	O. n.	1.00^a ± 0.04^B	10.99^b ± 0.42^A	11.70^b ± 0.59^A	0.01
	M. c.	0.29^b ± 0.05^C	31.44^a ± 4.61^A	17.72^a ± 1.21^B	0.01
	P _t<	0.01	0.01	0.01
Skin	O. n.	1.00^a ± 0.03^B	10.17^a ± 0.41^A	9.49^b ± 0.20^A	0.01
	M. c.	1.07^a ± 0.20^B	11.53^a ± 1.02^A	12.55^a ± 1.03^A	0.01
	P _t<	NS	NS	0.05
Muscle	O. n.	0.89^a ± 0.08^B	1.81^a ± 0.41^A/B	2.22^a ± 0.33^A	0.05
	M. c.	0.71^a ± 0.11^B	1.13^a ± 0.26^B	1.82^a ± 0.23^A	0.05
	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)