Table 2. Average heavy metals concentration (µg/g ww) in tissues of fishes collected from Padma River, north-west part of Bangladesh

Fish	Tissue	Amount of heavy metal (mg/kg w.w)
		Zn	Mn	Cu	Cd	Cr	Pb	Ni
Puntius ticto	Muscle	13.95±3.18	22.65±4.06	1.33±0.49	0.32±0.08	2.54±0.64	2.43±0.61	2.17±0.53
	Skin	18.61±3.82	21.10±3.34	3.13±1.19	0.5±0.05	2.31±0.67	3.04±0.82	2.76±0.67
	Gill	25.53±3.85	26.99±3.92	4.29±1.06	1.20±0.51	3.35±0.85	4.37±0.98	3.39±0.68
Aspidoparia joya	Muscle	12.06±3.13	15.82±3.86	1.70±0.72	0.52±0.05	1.52±0.49	2.62±0.47	1.35±0.25
	Skin	15.55±3.00	19.61±3.62	1.99±0.38	0.38±.06	1.54±0.40	2.40±0.54	1.53±0.47
	Gill	20.07±4.45	19.75±3.15	2.94±1.07	0.61±0.04	1.63±0.67	2.93±0.59	1.87±0.30
Eutropiichthys vacha	Muscle	11.75±3.05	12.50±3.72	1.38±0.45	0.41±0.04	2.53±0.65	4.81±1.36	2.17±0.42
	Skin	14.97±3.20	17.05±3.13	2.48±0.6	0.54±0.2	3.15±0.37	5.37±0.74	2.31±0.44
	Gill	14.82±3.22	15.53±3.63	2.93±1.13	0.35±0.04	3.28±0.66	5.70±0.78	2.44±0.52
Mystus cavasius	Muscle	14.45±4.07	20.77±3.41	1.72±0.77	0.64±0.04	2.83±0.53	2.65±0.55	3.12±0.63
	Skin	27.08±4.73	25.62±4.28	3.49±1.18	0.80±0.23	3.31±0.53	3.84±0.80	3.30±0.83
	Gill	19.42±3.85	24.12±4.03	3.28±0.88	1.34±0.39	3.25±0.64	3.78±0.85	2.49±0.69
Tenulosa ilisha	Muscle	19.21±3.82	26.93±3.61	1.93± 0.76	0.72±0.13	2.60±0.33	2.88±0.43	3.52±0.31
	Skin	26.14±3.42	31.17±3.81	3.34±1.02	1.83±0.49	2.03±0.48	3.31±0.78	2.11±0.76
	Gill	31.82 ±5.15	34.15± 5.41	3.69± 1.02	2.85± 0.85	3.00 ±0.46	3.18 ±0.37	3.14± 0.88
Mean ± SD		19.03±6.08	22.25±6.01	2.64±0.91	0.87±0.69	2.59±0.66	3.55±1.06	2.51±0.68