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Effect of mercury effluents on marine bivalves

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Relation http://eprints.cmfri.org.in/2617/
 
Title Effect of mercury effluents on marine bivalves
 
Creator Marichamy, R
Easterson, D C V
Kandasamy, D
Kasim, H M
Rajapackiam, S
 
Subject Molluscan Fisheries
 
Description High concentration of mercury and acidity have been noticed in the effluents of Dharansadara
Chemical Works and Plastic Resins and Chemical Centre near Kayalpatnam, south of Tuticorin. The bar
mouth of the polluted lagoon is opened during November-January and the discharges of heavy metal
toxicants in the open sea is of great concern in the management of marine and nearby ecosystems. Sea
water in the industrial coastal area contains mercury in the range 18-70 pg/ml. Marine organisms
such as bivalves have a particularly high capability for concentrating heavy metals. Investigations have
been carried out on the survival of two important bivalves of the region Crassostrea madrasensis
end Mesodesma glabratum of different size groups by abruptly exposing to different concentrations
from sharp lethal to non-lethal concentrations of the industrial effluents, Samples of these two species
have also been exposed to different sub lethal concentrations for varying durations to study the uptake
and rate of accumulation of mercury in the tissues of the bivalves. The results of the observations are
discussed. The study provides information as to when exactly the bivalves are brought under stress end
for planning preventive measures to protect the valuable resources.
 
Publisher CMFRI
 
Date 1988
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2617/1/Article_39.pdf
Marichamy, R and Easterson, D C V and Kandasamy, D and Kasim, H M and Rajapackiam, S (1988) Effect of mercury effluents on marine bivalves. CMFRI Bulletin, 42 (2). pp. 410-413.