Abstract:
:Three trace heavy metals viz., nickel, copper and zinc were studied for their toxic action against Poecilia retriculata (Peters). Among these, copper was found to be most active followed by zinc and nickel. Accumulations of these metals as well as behavioural studies were carried out after exposing fish to sub-lethal concentration of LC20. It was found that the highest quantity of nickel was accumulated in the fish body followed by zinc and copper. After exposure to sub-lethal concentration of metals some behavioural changes in fish were observed due to stress, such as mucus like secretion over gills, excessive excretion, anoretic condition and increased distance between gills and operculum. In all the cases fin movement was observed. Role and use of such changes as biological indicators or as biological early warning system in water quality assessment has been discussed.
journal_name
J Environ Bioljournal_title
Journal of environmental biologyauthors
Khunyakari RP,Tare V,Sharma RNsubject
Has Abstractpub_date
2001-04-01 00:00:00pages
141-4issue
2eissn
0254-8704issn
2394-0379journal_volume
22pub_type
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