Time series analysis of shrimp bioaccumulation of heavy metals.pdf (original) (raw)
The Indian Sundarbans mangrove forest at the apex of Bay of Bengal is a unique ecosystem with significant spatial variation of aquatic salinity between the western and central sectors due to factors like Farakka Barrage discharge and Bidyadhari siltation. The western sector is relatively less saline owing to fresh water discharge from the Faraka barrage constructed in 1975 in the upstream region of the Hooghly estuary. The central sector, on the other hand is characterized by high aquatic salinity due to complete obstruction of the fresh water flow through Ganga-Bhagirathi-Hooghly channel. The obstruction is caused due to heavy siltation in the Bidyadhari River since late 15 th century. We observed significant variations in dissolved heavy metals and shrimp (Fenneropenaeus indicus) muscle metal collected from four different sampling stations (two each in western and central sectors) during 2001 to 2012 (p < 0.01). The low salinity and intense industrialization in the Hooghly estuarine stretch is responsible for high concentrations of heavy metals in the shrimp muscle sampled from the stations in and around the western Indian Sundarbans. In both the sectors, heavy metals accumulated in the shrimp muscle as per the order zinc > copper > lead, which is similar to the order in the ambient estuarine water.
Sign up for access to the world's latest research.
checkGet notified about relevant papers
checkSave papers to use in your research
checkJoin the discussion with peers
checkTrack your impact
Loading Preview
Sorry, preview is currently unavailable. You can download the paper by clicking the button above.