Record Details

Bio-accumulation of some trace metals in the short-neck clam Paphia malabarica from Mandovi estuary, Goa

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Bio-accumulation of some trace metals in the short-neck clam Paphia malabarica from Mandovi estuary, Goa
 
Creator KrishnaKumari, L.
Kaisary, S.
Rodrigues, V.
 
Subject bioaccumulation
trace metals
brackishwater molluscs
seasonal variations
pollution effects
lead
cadmium
Paphia malabarica
 
Description Monthly collections of the clam Paphia malabarica were made for period of 1 year from May 2002 to April 2003 from Verem, Mandovi estuary, Goa, India. Clams were categorised into two groups, 25-35 mm (small size) and 35-40 mm (big size). Significant difference was not observed in the accumulation of metals in the whole soft tissue between the two size groups. Irrespective of size, annual mean, metal content recorded as mu g/g dry weight in the whole soft tissue was 3.8, 30.3, 13.5, 36.6 and 105.7, respectively, for Cd, Pb, Cu, Zn and Fe. Of the two toxic elements Cd and Pb, Cd content was almost uniform throughout the year except for a rise in September for the small size and October for the big size. Pb, on the other hand, was low from the beginning of the monsoon and exhibited distinct accumulation from December onwards up to April, May and, to some extent, June. The pattern was similar in both the size groups, the values being higher for the bigger size group. The three essential elements Cu, Fe and Zn exhibit trends similar to one another with peaks in September and December-January in both the size groups. Cadmium accumulation was highest in the mantle and adductor muscle, Lead, in foot, Copper, in digestive gland and gonad, and Zn and Fe, in gills. Correlation coefficient between different metal couplings as tested statistically revealed significant coupling for Zn-Fe (r 0.92) in the bigger size group, the same was observed between Cu-Fe (r 0.62) and Cd-Zn (r 0.94). Seasonal difference in Pb accumulation was highly significant
 
Date 2008-02-12T04:35:01Z
2008-02-12T04:35:01Z
2006
 
Type Journal Article
 
Identifier Environment international, Vol.32; 229-234p.
http://drs.nio.org/drs/handle/2264/809
 
Language en
 
Rights Copyright [2006]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Elsevier