Vol. 2, Issue 5 (2017)
Temporal and spatial assessment of iron in the soft tissues of six species of shellfish from Pulicat lake, Tamil Nadu, India
Author(s): Dhinamala K, Shalini R, Pushpalatha M, Arivoli S, Samuel T, Raveen R
Abstract: Marine organisms tend to accumulate heavy metals from the environment and are adapted to handle natural fluctuations in intake brought about by slight changes in their availability in water or food. Aquatic organisms are widely used to monitor environmental health due to anthropogenic impacts. In the present study, the bioaccumulation of iron in the gills and muscles of six species of shellfish viz., Fenneropenaeus indicus, Fenneropenaeus monodon, Fenneropenaeus semisulcatus, Scylla serrata, Meretrix casta and Clibanarius longitarsus from Pulicat lake, Tamil Nadu, India on a monthly basis for a period of two years from January 2011 to December 2012 during four seasons viz., postmonsoon, summer, premonsoon and monsoon were analysed. The accumulation of iron in the gills and muscles of the six shellfish species exhibited seasonal as well as species specific variations. The overall results indicate the muscle tissues of Scylla serrata to accumulate the maximum amount of 8.68µg/g iron during summer in the year 2012. As the concentration of the heavy metal in the shellfish tissue depends on the bioavailability of metals in the aquatic environment due to the urbanization and industrialization, proper steps should be taken to check the discharge of industrial wastes into the water bodies.