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Response of a freshwater air-breathing fish, Clarias batrachus to salinity stress: an experimental case for their farming in brackishwater areas in Andaman, India

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Title Response of a freshwater air-breathing fish, Clarias
batrachus to salinity stress: an experimental case for their
farming in brackishwater areas in Andaman, India
Not Available
 
Creator Sarma,Kamal
George,Grinson
Krishnan,K
Prabakaran,K
Anand Kumar,A
 
Subject Ascorbic acid
Glucose
Stress
Enzyme
Catfish
 
Description Not Available
The study was conducted to assess the effects of salinity on growth and
biochemical composition of freshwater catfish, Clarias batrachus. A static nonrenewable
acute toxicity bioassay test was conducted and LC50 of salinity for 96-h exposure to the
fingerling (14.5 cm) was 12.52 %. Based on these results, two sublethal salinity levels,
viz. 4 and 8 %were selected to study the long-term effects of salinity on C. batrachus for a
period of 90 days. From the study, it was found that growth and survival rate were less in
saline water (4 and 8 %). Maximum growth and survival were recorded in freshwater
(0 % salinity) and subsequently at 4 and 8 %. To assess the biochemical alteration, few
important biomarkers were estimated. At the end of 90 days rearing period, glucose level
in the brain and blood of C. batrachus was found to decrease with salinity. The level of
liver and muscle glycogen in the fish reared at 4 % was lower than that of control.
Ascorbic acid in all organs under study was found to decrease with increasing salinity,
which was attributed to stress mitigation effect of vitamin C. Acetylcholine esterase
(AchE) activity recorded a gradual decrease with increasing salinity. Metabolic enzymes,
alkaline phosphatase (ALP) activity and adenosine triphosphosphtase (ATPase) activity
also reduced both in liver and muscle tissues with increasing salinity. From the present
investigation, it can be concluded that exposure to higher salinity significantly (P \ 0.01)
affects the growth and physiological response of Clarias batrachus.
Not Available
 
Date 2021-09-16T06:56:45Z
2021-09-16T06:56:45Z
2012
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/63032
 
Language English
 
Relation Not Available