Clams as pollution bioindicators in Kuwait's marine environment: metal accumulation and depuration

Heavy metal depuration in flat tree oystersisognomon alatusunder field and laboratory conditions

“…A significant 78% decrease in Cd concentration in the eastern oysters dosed in the laboratory and relayed to Mobile Bay, Alabama, for 147 days, was also comparable to our results [23]. Such a sharp decrease of Cd in clams has been documented only during the first 12 days of depuration [24].…”

Heavy metal concentrations in some macrobenthic fauna of the Sundarbans mangrove forest, south west coast of Bangladesh

“…These variations in Pb were evidently due to the seasonal changes and also to the influence of temperature and salinity (Zorba et al 1992). The high Pb concentrations in the present investigation might be due to the discharge of various amounts of disposable solids, metal rust and lubricants from the scrapping of ships and industrial activities from Khulna and Mongla regions.…”

“…Seasonal and interspecies variations in Cd concentrations (below detectable level to 80 μg/g) of gastropods were reported from Indian Sundarbans (Sarkar et al 2002). Accumulation of Cd in clam (0.18 to 0.32 μg/g) was reported to depend on the bioavailability of Cd in sea water and sediment (Zorba et al 1992). Cd uptake rate increases with temperature and low salinity in Crassotrea viginica (Zaroogian 1980) and Saccostrea echinata (Burden- Jones and Denton 1984).…”

“…In Kuwait's marine environment, the highest concentration of Cu (12.5 μg/g) was observed in clams as sediment of that region is enriched with this pollutant (Zorba et al 1992). The concentration of Cu fluctuates seasonally within the range of 3.0 to 6.6 μg/g in Patella sp.…”

Global characterization of dose-dependent effects of cadmium in clam Ruditapes philippinarum

“…Marine clams are preferable bioindicators to metal pollution because of its wide distribution, ease of collection, as well as capacity of pollutant accumulation (Cappello et al, 2018;Wang et al, 2012;Zorba et al, 1992). Though marine clams have been frequently utilized for characterization of Cd toxicity and environmental monitoring (Bao et al, 2016;Chora et al, 2009;Ji et al, 2019), poor attention has been paid on the dose-dependent effects of Cd in marine clams.…”