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:: Volume 5, Issue 17 (2014) ::
2014, 5(17): 1-9 Back to browse issues page
Determination the Lethal Concentration (LC50) of Potassium Dichromate and Behavioral Responses in Epaulet Grouper (Epinephelus stoliczkae)
Parvin Sadeghi , Ahmad Savari , Abdolali Movahedinia , Alireza Safahieh , Daniel Azhdari
, parvin.sadeghi@gmail.com
Abstract:   (14958 Views)
The LC50-96h test paradigm is used to measure the susceptibility and survival potential of organisms exposed to particular toxic substances, such as heavy metals. In this study, the Median Lethal Concentration (LC50) of potassium dichromate (K2Cr2O7) during 96 h was determined in Epinephelus stoliczkae. Six groups of experimental fish (7 fish in each group) with 218±0.5 g weight average and 29.6 cm total length were exposed to different concentration of dichromate potassium (0, 62, 66, 70, 74 and 78 mg/L) for 96 h. The experiments were performed in triplicate (21 fish per each treatment). The temperature, salinity and pH were continuously measured throughout the experiments that were 27.5±0.50C, 37 ppt and 8.1, respectively. The LC50-96h was determined to be 73.09 mg/L in a static bioassay test system. Mortality percentage increased with increasing duration of exposure and increasing chromium concentrations. The behavioral changes observed in Epinephelus stoliczkae in the experiment period included breathing difficulty, slow down motility, loss of balance, capsizing , swimming on water surface, gathering around the ventilation filter, increased mucus secretion, bloodshed of gills, mouth and fish fins and change of body coloration. Acute toxicity effect of potassium dichromate increased with increasing its concentrations.
Keywords: Chromium, LC50, Heavy metal, Epinephelus stoliczkae, Behavior
Full-Text [PDF 149 kb]   (3570 Downloads)    
Type of Study: Research/ Original/ Regular Article |
Received: 2014/06/20 | Revised: 2015/02/28 | Accepted: 2014/06/20 | ePublished: 2014/06/20


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Sadeghi P, Savari A, Movahedinia A, Safahieh A, Azhdari D. Determination the Lethal Concentration (LC50) of Potassium Dichromate and Behavioral Responses in Epaulet Grouper (Epinephelus stoliczkae). Journal of Oceanography 2014; 5 (17) :1-9
URL: http://joc.inio.ac.ir/article-1-514-en.html


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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 5, Issue 17 (2014) Back to browse issues page
نشریه علمی پژوهشی اقیانوس شناسی Journal of Oceanography
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