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International Journal of Agricultural and Forestry Sciences

Volume 1, Issue 1, 2016
Mcmed International
International Journal of Agricultural and Forestry Sciences
Issn
XXX-XXXX (Print), XXXX-XXXX (Online)
Frequency
bi-annual
Email
editorijafs@mcmed.us
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Abstract
Title
IMMOBILIZATION EFFECT OF POTASSIUM DICHROMATE ON DAPHNIA MAGNA (STRAUS)
Author
Venkatesan Sudha, Kathirvelu Baskar*, Chidambaram Tamilselvan
Email
suribaskar@hotmail.com;brfchennai@gmail.com
keyword
Daphnia magna, Effective concentration, less than 24 h old, Immobility.
Abstract
In the present study, potassium dichromate was evaluated against an aquatic invertebrate, Daphnia magna. The control and test medium, physico chemical parameters viz., temperature (21.2 -21.9°C), pH (6.3-6.7) and dissolved oxygen concentration (3.4 -3.7 mg/l) were within the limit for all trials. The potassium dichromate exhibited 100% immobility at 4 mg/l concentration for all the trials. There was no immobility observed at 0.125 mg/l concentration in 1st and 3rd trials but 2nd trial showed 6.6% immobility. More than 50% of immobility was recorded in 2 mg/l concentration in all the trials. The effective concentration of 1.3, 0.8 and 0.9 mg/l concentration were obtained for 1st, 2nd and 3rd trial respectively for 50% immobility. Our results indicate that the potassium dichromate was toxic to D. magna. In this research suggested that avoid contamination of the aquatic ecosystem for secure food chain of living organism.
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