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Talukdar B.,Gauhati University | Kalita H.K.,Gauhati University | Baishya R.A.,Gauhati University | Basumatary S.,Gauhati University | And 3 more authors.
National Academy Science Letters | Year: 2016

The paper deals with the studies on impact of Acid Mine Drainage of coal mining on total soluble protein content of fish, Channa punctatus. Acid Mine Drainage of coal mines was collected from the coal mining area near Simsang River, Garohills, Meghalaya and LC50 value (28 % of effluent) for 96 h was determined. Fishes were treated in sub lethal concentration (one-fifth of LC50 value) of Acid Mine Drainage of coal mines for 24, 48, 72 and 96 h to evaluate its impact on total soluble protein in the muscle and liver. It was found that there was a decreasing trend of total protein content and maximum decrease was found at 48 and 72 h in liver and muscle respectively. However, a little rise of protein content was found at 72 h in liver and 96 h in muscle. This might be due to rise of proteolytic activity in liver suggesting the increased enzymatic activities to cope with toxic stress. © 2016, The National Academy of Sciences, India.

Akhtar M.S.,Directorate of Coldwater Fisheries Research ICAR | Pal A.K.,Central Institute of Fisheries Education | Sahu N.P.,Central Institute of Fisheries Education | Ciji A.,Central Institute of Fisheries Education | And 2 more authors.
Proceedings of the National Academy of Sciences India Section B - Biological Sciences | Year: 2014

In the present study, Labeo rohita juveniles previously fed with tryptophan (TRP) supplemented diet for 60 days were exposed to temperature and salinity stress for the next 30 days with the same feeding regime to evaluate the stress mitigating efficacy of TRP. After 30 days of exposure to temperature and salinity, the stress exposed groups recorded higher aspartate amino transferase (AST), alanine amino transferase (ALT) and lactate dehydrogenase (LDH) activities as compared to control. In, liver and muscles, the highest activities of LDH, AST and ALT were observed in TRP0+S+T followed by TRP0+T and TRP0+S groups. Dietary supplementation of TRP was found to significantly reduce the activities of these enzymes in both the tissues. The lowest and highest acetylcholine esterase activity was evidenced in TRP0+S+T and TRP0+NS (control) groups respectively. The serum chloride concentration and serum osmolarity of L. rohita juveniles were significantly increased upon salinity exposure while temperature did not cause any significant change. The lowest concentration of sodium was observed in TRP0+NS while all other salinity exposed groups recorded higher values. A reverse trend was noticed in case of serum potassium concentration, being highest in TRP0+NS. The dietary supplementation of TRP had no significant effect in modulating the potassium as well as chloride concentration. The results of the present experiment suggest that exposure to temperature and salinity alters the serum electrolytes and osmolarity and dietary supplementation of tryptophan helps in ameliorating the stress as evidenced by various enzymic responses. © 2014, The National Academy of Sciences, India.

Darshan A.,Directorate of Coldwater Fisheries Research ICAR | Anganthoibi N.,Manipur University | Vishwanath W.,Manipur University
Zootaxa | Year: 2011

Batasio convexirostrum, a new bagrid catfish, is described from the Koladyne drainage, Mizoram, India. It is distinguished from congeners by a combination of the following characters: body with a dark-brown oblique predorsal bar on a uniform light-brown background; very short dorsal to adipose distance (1.7-4.1% SL); snout length 39.2-45.5% head length; eye diameter 24.6-29.8% head length; gill rakers on the first branchial arch 4-5; pectoral spine length 14.6-17.6% standard length; adipose-fin base length 31.0-34.9% standard length; post-adipose distance 10.6-13.7% standard length; branched pectoral fin rays 9-10; and 39-40 vertebrae.Copyright © 2011. Magnolia Press.

Talukdar B.,Gauhati University | Basumatary S.,Gauhati University | Kalita H.K.,Gauhati University | Baishya R.A.,Gauhati University | And 3 more authors.
National Academy Science Letters | Year: 2015

A study was conducted to analyse the toxic affect of acid mine drainage (AMD) of coal mines on the histology of kidney and liver of Tor tor collected from Simsang River, Garohills; Meghalaya. Fishes from coal mining affected and unaffected areas were collected for the histopathological assay of liver and kidney. It was observed from the histopathological investigation that most of the impact of AMD of coal mining was found in cellular level. In liver, lesions were developed with vacuolation, degeneration of hepatocytes and disintegration of cell boundaries of hepatocytes. The changes noted in the kidney were enlargement of renal tubules, hyperplasia and shrinkage in glomeruli. © 2015, The National Academy of Sciences, India.

Singh R.,Central Institute of Fisheries Education | Kumar A.,A.P.S. University | Pandey N.N.,Directorate of Coldwater Fisheries Research ICAR | Gupta M.,A.P.S. University | And 5 more authors.
Journal of Ecophysiology and Occupational Health | Year: 2013

An attempt was made to evaluate the antifungal activity of aqueous extract of Cymbopogon citrates for controlling Saprolegnia parasitica (in vitro) isolated from endangered fish Tor putitora Sterilized aqueous extract of Cymbopogon citrates at different concentrations (5%, 8% and 10% w/v) was tested against the mycelial mass of the Saprolegnia parasitica for three different time periods (20 min., 40 min., and 60 min.) and colony diameter of Saprolegnia fungus was measured. Bacteria free pure culture of the test fungus was maintained on SDA (Sabouroud's Dextrose agar). Results revealed that the aqueous extract of C. citrates possess high degree of antifungal activities against the test pathogen. Accordingly the MIC (minimum inhibitory concentration) was determined as 5% w/v at 20 minute exposure time for the extract. © 2013 The Academy of Environmental Biology, India.

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