Acute toxicity of mercury to the fingerlings of Indian major carps (catla, rohu and mrigal) in relation to water hardness and temperature.
J Environ Biol
;
2006 Jan; 27(1): 89-92
Article
in English
| IMSEAR
| ID: sea-113353
ABSTRACT
In the present study short-term (96 hr) toxicity of mercury in relation to water hardness (270 and 560 mg/l) and temperature (16 degrees C and 35 degrees C) to the fingerlings of Indian major carps, i.e. catla, rohu and mrigal has been evaluated using static bioassay. The LC5o indicates that both water hardness and temperature played significant role in mercury toxicity. The test fishes were found most resistant with water hardness of 560 mg/l at 16 degrees C as compared to that of water hardness of 560 mg/l at 35 degrees C and water hardness of 270 mg/l at both the temperatures, i.e. 35 and 16 degrees C. Whereas the order of relative sensitivities of these fishes for mercury ions were recorded as catla>rohu>mrigal. The safe concentrations of mercury were ranged in between 12.133 to 19.689 microg/l for catla; 64.039 to 82.555 microg/l for rohu and 73.510 to 89.585 microg/l for mrigal for both the water hardness and temperature.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Temperature
/
Carps
/
Cyprinidae
/
Water
/
India
/
Larva
/
Lethal Dose 50
/
Animals
/
Mercury
Country/Region as subject:
Asia
Language:
English
Journal:
J Environ Biol
Year:
2006
Type:
Article
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