International Journal of Oceanography

Research Article

Bioaccumulation of Polycyclic Aromatic Hydrocarbons and Mercury in Oysters (Crassostrea rhizophorae) from Two Brazilian Estuarine Zones

Table 1

Concentration of mercury and PAH in sediments and oysters from Santos and Paranaguá estuarine systems (mean of dry season—august 2008—and rainy season—may 2009).


Local/matrix	Total Hg (mg kg⁻¹)	Bioaccumulation^* %	Total PAH (μg kg⁻¹)	Bioaccumulation^* %

Sediments-Paranaguá
P1 Guapicú	0.09	—	10.01	—
P2 Antonina Port	0.11	—	9.59	—
P3 Gamelas	0.13	—	16.43	—
P4 Paranaguá Port	0.15	—	21.18	—

Sediments-Santos
P1 Piaçaguera Channel	1.92	—	1.406,13	—
P2 Bagres Island	1.97	—	431.71	—
P3 Alemoa	1.60	—	133.72	—
P4 Palmas Island	0.36	—	36.48	—

Native oysters-Paranaguá
P1 Guapicú	0.35	—	32.20	—
P2 Antonina Port	0.22	—	31.42	—
P3 Gamelas	0.14	—	34.69	—
P4 Paranaguá Port	NA	—	NA	—

Native oysters-Santos
P1 Piaçaguera Channel	NA	—	NA	—
P2 Bagres Island	0.32	—	182.99	—
P3 Alemoa	0.37	—	121.18	—
P4 Palmas Island	0.32	—	51.72	—

Caged oysters
Control oyster (T-zero)	0.08	—	32.52	—

Transplanted oysters, after 30 d-Paranaguá
P1 Guapicú	0.07	−18.9	42.18	29.7
P2 Antonina Port	0.09	10.7	35.83	10.2
P3 Gamelas	0.08	3.1	33.41	2.7
P4 Paranaguá Port	0.03	−66.0	53.70	65.2

Transplanted oysters, after 30 d-Santos
P1 Piaçaguera Channel	0.12	44.0	584.33	1.697.0
P2 Bagres Island	0.20	150.9	234.32	620.6
P3 Alemoa	0.15	86.2	295.31	808.2
P4 Palmas Island	0.08	0.6	50.54	55.4

^*Caged oysters percent biaccumulation in the 30 day experiment. NA: Not available.