Bioaccumulation of Heavy Metals in Some Tissues of Fish in Lake Geriyo, Adamawa State, Nigeria

Table 3

Heavy metals in flesh (mg/kg, ww) of fish from Lake Geriyo and Maximum Permissible Limits (MPL) international standard.

Heavy metals	Concentrations of metals (mg/kg, ww) in different species						MPL
	Claris		Tilapia		Heterotis		FAO [13]	FAO/WHO [14]	WHO [15]	England [16]
	Zn	5.35	4.17	4.48	5.06	10.18					6.61	30	40	100	50
Pb	0.23	8.44	0.01	3.78	3.51	7.12	0.5	0.5	2	2
Cd	0.54	0.37	0.30	0.33	0.35	0.39	0.05	0.5	1	2
Cu	0.15	2.02	0.15	1.27	0.15	4.42	30	30	30	20

= dry season; = wet season.