Temporal Changes in Concentrations of Some Trace Elements in Muscle Tissue of Crayfish, Astacus leptodactylus (Eschscholtz, 1823), from Keban Dam Lake

Table 1

The levels of trace elements in abdomen muscles of crayfish (A. leptodactylus Eschscholtz, 1823) between 2006 and 2012 in Keban Dam Lake (Elazığ, Turkey).

Trace elements; (mg kg^−1)	Sampling periods
	2006	2007	2008	2009	2010	2011	2012
As	0.037	UDL*	UDL	UDL	UDL	0.146	UDL
Cd	0.01	UDL	0.02	UDL	0.01	UDL	0.01
Cu	7.20	5.28	4.39	2.42	3.81	4.74	6.967
Hg	0.193	0.160	0.059	0.016	0.150	0.983	0.418
Pb	0.03	UDL	UDL	UDL	0.01	0.04	0.08
Zn	21.69	17.95	16.22	4.35	14.60	16.04	21.65

∗UDL: under detection limit.