From the Indian Sundarbans, two sites with contrasting aquatic
salinity were considered in this study. One site was from
the western region (low saline), locally known as Sagar South
(88◦0147.28N Latitude and 21◦314.68E Longitude), and the
other site was from the central region (high saline) – located at
Canning (88◦40’36.84N Latitude and 22◦1837.44 E Longitude)
adjacent to tide fed Matla River (Fig. 1). The station in the western
region is at the confluence of the River Hooghly (continuation
of Ganga–Bhagirathi system) and the Bay of Bengal