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Articles by Ram C. Sihag
Total Records ( 3 ) for Ram C. Sihag
  Parvati Sharma , Ram C. Sihag and S.K. Gahlawat
  The Epizootic Ulcerative Syndrome (EUS) is a dreaded disease of mrigal (Cirrhinus mrigala Ham.) inflicting heavy mortality in the latter fish at the farmers’ ponds. To realize a good harvest, the control of this disease through the use of some probiotics is most important. The aim of study was to ascertain the effect of two probiotics on various blood and life parameters of mrigal (C. mrigala). Two commercially available probiotics with different compositions were tested for this purpose. In vitro trials were performed by the usual ‘well poisoning method’ whereas in vivo trials were performed in the fishes that were subjected to induced pathogenicity. In the treated fishes, periodic observations were recorded on their different hematological (viz., amount of hemoglobin, total erythrocyte count and total leukocyte count), survival and growth (length and weight) parameters. In the in vitro trials both probiotics developed clear zones of inhibition. However, the zone shown by probiotic-1 (having bacteria only) was smaller in size than that by probiotic-2 (in addition to bacteria also having vitamins, enzymes and salts), revealing the probable greater efficacy of the latter than the former. In the in vivo trials, the values of all the hematological parameters were found to decrease (leukocyte count increased) in the fish having induced pathogenicity and so were survival and growth parameters. But these values showed significant increase (leukocyte count decreased) in the probiotic treated fishes. This confirmed the useful role of both the probiotics in controlling the EUS disease in the mrigal. However, probiotic-2 was found to be more effective than probiotic-1 in increasing the hematological parameters and growth and survival in this fish.
  Sunita Godara , Ram C. Sihag and Rajender K. Gupta
  Vermicompost is one of the ready to use organic fertilizers. The efficacy of vermicompost vis-a-vis other organic fertilizers for fish production has not yet been extensively explored. For this purpose, an experiment was performed on three Indian major carps viz. catla (Catla catla Ham.), rohu (Labeo rohita Ham.) and mrigal (Cirrhinus mrigala Ham.). The fry/fingerlings acclimated for 10 days prior to the commencement of experiment were stocked in 5.54x6.15 m size ponds with a stocking density of 30 fish per pond in a ratio of 3:4:3, respectively. Six treatments viz. a control (T1) without any treatment, pig manure at 4,000 kg ha-1 year-1 (T2), poultry manure at 6,000 kg ha-1 year-1 (T3), cow dung at 10,000 kg ha-1 year-1 (T4), vermicompost at 10,000 kg ha-1 year-1 (T5) and vermicompost at 15,000 kg ha-1 year-1 (T6) were used and their effect on growth performance of these fishes was recorded every month for a period of one year. All the six treatments caused significant monthly increase in fish growth; the three fish species gained maximal growth (length and weight) in ponds treated with vermicompost at 10,000 kg ha-1 year-1 (35.6 cm, 900.5 g; 36.8 cm, 935.0 g; 35.2 cm, 879.0 g), followed by vermicompost at 15,000 kg ha-1 year-1 (31.8 cm, 880.8 g; 32.1 cm, 910.2 g; 33.2 cm, 860.2 g), cow dung at 10,000 kg ha-1 year-1 (28.7 cm, 835.7 g; 29.3 cm, 850.7 g; 30.1 cm, 783.0 g), poultry manure at 6,000 kg ha-1 year-1 (26.5 cm, 768.7 g; 27.4 cm, 792.2 g; 28.9 cm, 760.9 g), pig manure at 4,000 kg ha-1 year-1 (25.1 cm,718.1 g; 25.9 cm, 732.9 g; 26.8 cm, 693.8 g) and the control (21.7 cm, 645.5 g; 22.0 cm, 606.2 g; 23.1 cm, 591.2 g), respectively; the differences between treatments were significant. Among the three species, Labeo rohita attained the maximal growth (length and weight) (36.8 cm and 935.0 g) followed by Catla catla (35.6 cm and 900.5 g); Cirrhinus mrigala showed the minimal growth (35.2 cm and 879.0 g). Pond fertilization with vermicompost at 10,000 kg ha-1 year-1 (in split doses) seemed to be the optimum dose for the maximum growth of Indian major carps.
  Sunita Godara , Ram C. Sihag and Rajender K. Gupta
  Organic fertilizers are used to enhance the productivity of inland aquatic resources. These fertilizers directly influence the water quality parameters which in turn form the aquatic environment. Vermicompost is a new introduction to the list of organic fertilizers used in aquaculture production. However, its effects on water quality parameters have not yet been fully investigated. To accomplish this objective, the present study was undertaken. The experiment was carried out in 5.54×6.15 m size ponds with a stocking density of 30 fish per pond in a ratio of 3:4:3 of Indian major carps viz. catla (Catla catla Ham.), rohu (Labeto rahita Ham.) and mrigal (Cirrhinus mrigala Ham.). Different organic fertilizers used as treatments were: untreated ponds as the control (T1), pig manure at 4,000 kg ha–1 year–1 (T2), poultry manure at 6,000 kg ha–1 year–1 (T3), cow dung at 10,000 kg ha–1 year–1 (T4), vermicompost at 10,000 kg ha–1 year–1 (T5) and vermicompost at 15,000 kg ha–1 year–1 (T6). One fourth dose of fertilizers was applied 15 days prior to the start of observations and remaining doses in equal amounts were given at fortnightly intervals. The water quality parameters like dissolved oxygen, pH, alkalinity, hardness, free carbon dioxide, nitrogen, potassium, phosphorous, temperature, turbidity and planktons were measured at monthly intervals. Pond waters treated with vermicompost at 10,000 kg ha–1 year–1 seemed to be the best among the six treatments. This was evident in case of DO, alkalinity, hardness, light penetration, free carbon dioxide, phytoplanktons and zooplanktons. For other parameters too, this treatment kept their values in the favorable ranges. On the basis of all permutations and combinations, therefore, vermicompost at 10,000 kg ha–1 year–1 came out to be the best among the six treatments used in this study. The results revealed that, except for temperature, values of all other water quality parameters in the treated ponds differed significantly between treatments as well as months. Despite this, the values of most of the chemical and physical parameters of all the treatments fell in the favorable ranges. Then, pond waters treated with vermicompost at 10,000 kg ha–1 year–1 (T5), were found to have the best levels of quality parameters as compared to those in the other treatments.
 
 
 
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