Open AccessDETERMINATION OF MEDIAN TOLERANCE LIMIT (LC50) OF CHANNA PUNCTATA (BLOCH) FOR CADMIUM CHLORIDE
Author(s) -
Amaresh Chandra,
Ashok Kumar Verma
Publication year - 2021
Publication title -
international journal on biological sciences
Language(s) - English
Resource type - Journals
ISSN - 0976-4518
DOI - 10.53390/ijbs.v12i2.9
Subject(s) - bioassay , cadmium , cadmium chloride , toxicology , acute toxicity , environmental chemistry , detection limit , fish <actinopterygii> , metal , toxicity , biology , veterinary medicine , chemistry , fishery , ecology , medicine , chromatography , organic chemistry
The present investigation was undertaken to investigate the acute toxicity of cadmium, a heavy metal widely detected in the aquatic environment due to natural effects and anthropogenic activities, in freshwater teleost, Channa punctata (Bloch). The experiments for the bioassay were performed in semi-static test condition according to the standardguidelines. The behavioural changes in the fish were observed for all tested concentrations of the metal. The data obtained for bioassay were analyzed for median lethal concentrations (LC50) of the metal by SPSS computer software. The LC50values, estimated by SPSS, with 95% confidence level were found to be:20.589 (18.326-23.221), 17.133 (14.840- 19.734), 11.815 (9.696 – 13.850) mg/L and 9.908 (7.635-12381) mg/L for cadmium chloride at 24, 48, 72 and 96 h exposure, respectively.