Investigations on selected ecological parameters of Tuticorin Bay, Gulf of Mannar, south-east coast of India with emphasis on suitability for mariculture
2021
A study was conducted for a period of two years from 2017 to 2018 to assess the health of Tuticorin Bay, south-east coast of
India. Water and sediment quality parameters, total clam density, heavy metal content in the sediment and clam tissue samples
from four sites were used as the criteria for health assessment. High values of parameters like salinity (38.3±5.04 ppt) and
ammonia (0.09±0.04 mg l-1) were observed at the station close to the thermal power station and high nitrite (0.688±0.13 μg l-1)
and total suspended solids (380.3±0.04 mgl-1) were observed at the station close to Koramballam freshwater creek. Most of
the water quality variables were within the standard limit prescribed for aquaculture activities. The organic matter content
in the sediment of the bay ranged from 0.26 to 5.17%. Comparatively low heavy metal concentration was observed both in
the sediment and clam tissue samples. The metals were found accumulated in the order of Fe>Mn> Pb>Cu>Ni>Cd in the
sediment samples and in the order Fe>Pb>Mn>Cu>Cd>Ni in clam tissue samples. The estimated levels were also within
the permissible limits for most of the metals. The study indicated that Tuticorin Bay is suitable for mariculture activities.
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