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OJVRTM
Online Journal of Veterinary Research©
Volume 18(7): 572-580, 2014. Redacted
2017.
Acute toxicity of sodium cyanide and
sub-lethal effects on behaviour and
oxygen consumption in Catla catla and Cirrhinus mrigala Carp.
Shwetha A and Hosetti B.
Toxicology Laboratory,
Department of Applied Zoology, School of Biological Sciences, Jnana Sahyadri, Shankaraghatta - 577
451, Shimoga, Karnataka, India.
ABSTRACT
Shwetha A and Hosetti
B., Acute toxicity of sodium cyanide and its sub-lethal effects on behaviour and oxygen consumption in Catla
catla and Cirrhinus mrigala carp. Onl J Vet Res.,
18(7): 572-580, 2014. Acute toxicity of sodium cyanide
and its effects on behaviour and oxygen consumption
in Indian Catla catla and Cirrhinus mrigala carp are described.
Short-term acute toxicity tests were conducted by static renewal bioassay test
for 96 hours with differing concentrations of sodium cyanide. The 96h LC50
values of sodium cyanide on C. catla and C. mrigala were 0.240 mg/L and 0.458mg/L, respectively.
Fish in toxic media exhibited passive drift, active upstream movement, erratic
movements, loss of balance, hyper excitability,
spiral movement with sudden jerkiness, vertical movement with rapid
flapping of the operculus and opened mouth and
finally, settling. Respiratory activity (O2 consumption) was
affected with a decrease in metabolic rate at the end of exposures at day 7 and
14 of sub-lethal concentration in both fish species. Fish under sub-lethal concentrations were stressed but
did not die.
Key
words:
Behaviour, Catla catla, Cirrhinus mrigala, Oxygen consumption, Sodium cyanide.
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