DRS

DRS at National Institute Of Oceanography >
Institute's contributions >
Biological Sciences >

Please use this identifier to cite or link to this item: http://drs.nio.org/drs/handle/2264/809

Title: Bio-accumulation of some trace metals in the short-neck clam Paphia malabarica from Mandovi estuary, Goa
Authors: KrishnaKumari, L.
Kaisary, S.
Rodrigues, V.
Citation: Environment international, Vol.32; 229-234p.
Issue Date: 2006
Publisher: Elsevier
Abstract: 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
Document type: Journal Article
Copyright: 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 If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
URI: http://drs.nio.org/drs/handle/2264/809
Appears in Collections:Biological Sciences

Files in This Item:

File Description SizeFormat
Environ_Int_32_229.pdf331 kBAdobe PDFView/Open
Restrict Access. You can Request a copy!

Items in DRS are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

DRS is a service of NIO library (NICMAS) | | Feedback: satya at nio.org

DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard | | Compliant to OAI-PMH V 2.0