Effect of heavy metal pollution on growth, carotenoid content and bacterial flora in the gut of Perna viridis (L.) in in situ condition

The soft tissue of females of Perna viridis showed highest concentration of Fe, Mn, Cu, Zn, Cd, Pb, Co, Ni and Hg followed by males and indeterminates. The Hg was not detected in different sexes during May. The biomagnification of all heavy metals was maximum in gonad. In general, the order of metal...

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Bibliographic Details
Published in:Current science (Bangalore) 2001-10, Vol.81 (7), p.819-828
Main Authors: Tewari, A., Joshi, H. V., Raghunathan, C., Kumar, V. G. Sravan, Khambhaty, Yasmin
Format: Article
Language:English
Subjects:
Bacteria
Carotenoids
Gonads
Heavy metals
Marine
Muscles
Perna viridis
RESEARCH COMMUNICATIONS
Salmonella
Sea water
Shigella
Vibrio
Vibrio cholerae
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Summary:The soft tissue of females of Perna viridis showed highest concentration of Fe, Mn, Cu, Zn, Cd, Pb, Co, Ni and Hg followed by males and indeterminates. The Hg was not detected in different sexes during May. The biomagnification of all heavy metals was maximum in gonad. In general, the order of metal accumulation in the soft tissue of Perna viridis was – Fe > Co > Zn > Pb > Ni > Cu > Mn > Cd > Hg. The definite correlation between biomagnification of different heavy metals in whole animal or its different organs could not be observed with that of their concentrations in sediment. However, the concentration of all heavy metals was higher in soft tissue or its different organs than sea water. The concentration of total carotenoids and unsaponifiable carotenoid were higher in females followed by males and indeterminates. Both types of carotenoids in gonads had higher concentration than other body organs. In general, the total count of pathogenic bacteria was maximum in the gut of females followed by indeterminates and males. The percentage reduction of pathogenic bacteria after five days of starvation ranged from 28.92 to 42.81 in the least reduction category to 61.59 to 75.25 for the highest reduction category.
ISSN:0011-3891