Table 3.

Assessment of the levels of heavy metals recorded in this study with levels from previous studies

Sampling site	Cd	Cu	Pd	Zn	Mn	References
Asafo Market	0.007–0.019	0.020–0.156	0.054–0.085	0.016–0.022	0.015–0.028	This study
Dhaleshwari Riverb	0.61–0.71	5.17–7.48	4.25–8.17	–	–	Ahmed et al. (2009)
Daya Bay’s Fishery Resource Reservea	0.002–0.919	0.07–4.10	0.014–0.070	4.57–15.94	–	Gu et al. (2016)
Fosu Lagoonb	0.17–0.32	0.10–0.35	4.32–10.85	18.25–23.15	20.95–32.30	Akoto et al. (2014)
Hypermarketsb	1.17–4.25	2.3–12.05	3.24–9.17	16.79–49.43	7.72–13.99	Alturiqi and Albedair (2012)
Iskenderun Bayb	0.01–4.16	0.04–5.43	0.09–6.95	0.60–11.57	0.05–4.64	Türkmen et al. (2005)
Kerguelen Islandsa	0.010–0.086	0.5–2.5	–	9.2–33.2	–	Bustamante et al. (2003)
Pearl Riverb	ND-33.2	1.17–6.72	0.05–1.94	2.62–20.2	–	Xie et al. (2010)
Pearl Riverb	0.005–0.079	0.009–2.025	ND-1.049	ND-5.507	–	Wei et al. (2002)
Pearl River Deltaa	0.02–0.06	0.79–2.26	0.03–8.62	15.7–29.5	0.82–6.91	Leung et al. (2014)
Qinzhou Baya	0.001–0.154	0.01–3.8	0.042–0.299	5.73–11.42	–	Gu et al. (2015b)
Red Voltab	0.024–0.031	–	–	–	0.206–0.394	Asante et al. (2014)
São Pauloa	0.005–0.047	–	0.026–0.481	–	–	Morgano et al. (2011)
Southern Red Seaa	–	–	0.150–0.386	–	0.073–0.128	Idris et al. (2015)
Taihu Lakea	0.003–0.021	0.228–1.89	0.177–0.287	16–130	–	Chi et al. (2007)
Tono Irrigation Reservoirb	0.035	0.045	0.375	0.004	0.693	Anim-Gyampo et al. (2013)
Yangtze Rivera	ND-2	0.361–18.76	0.009–10.1	0.793–50.8	–	Yi et al. (2011)

^aValues signify the mean or ranges expressed as mg kg⁻¹ wet wt

^bValues signify the mean or ranges expressed as mg kg⁻¹ dry wt