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Articles by P. Santhanam
Total Records ( 3 ) for P. Santhanam
  N. Jeyaraj , P. Santhanam , P. Raju , S. Ananth and K. Jothiraj
  Sustainable aquaculture depends upon eco-friendly, economically and socially viable culture systems. The recycling of organic wastes for plankton culture serves the dual purpose of cleaning the environment and providing economic benefits. There has been no experimentation to measure the effect of organic manure for the aquaculture of copepods, it may be reduced time and labor cost. Hence, the present experiment was conducted to evaluate the mass culture feasibility of Harpacticoid copepod, Macrosetella gracilis using a different organic manures viz., cow dung, poultry manure, goat manure and mixture of these three (1:1:1 ratio) at 500 g for each tank manures were decomposed for twelve days before the inoculation of copepod. Twenty adult copepod M. gracilis were inoculated. The peak density was found on 10-14th day of at all doses, among these four doses, significantly higher numbers of organisms 4213.33±213.48 ind. L-1 were found in the cow dung followed by the poultry manure, goat manure and mixed doses 2350.66±148.20; 1573.60±121.41; 995±102, respectively. The number of organisms was ground very low in mixed doses than other doses. Water quality analyses of culture system was no significantly different among the treatments especially pH and salinity. Cow dung manure is therefore recommended for quick and high production of copepod, M. gracilis which invariably reduces the high cost of expensive algae feed for copepod.
  S. Dinesh Kumar , P. Santhanam , T. Jayalakshmi , R. Nandakumar , S. Ananth , A. Shenbaga Devi and B. Balaji Prasath
  The interaction of phosphorus and nitrogen on their removal by microalgae can be of great concern during their role as bioremediant of waste water. Microalgae play an imperative role in nutrient and heavy metal removal in wastewater by their biosorption mechanisms. The study was attempted to optimize the pH and retention time for nutrient and heavy metal (zinc) removal from aqueous solutions using immobilized marine microalga Chlorella marina as beads and powder. The study inferred that pH 6 was found to optimum for removal of all nutrients except nitrite. However, for heavy metal removal, the pH 8 was found to be suitable for biosorbent studies. Further, the present experiment inferred that the 24 h incubation was enough for nutrients and zinc removal while using immobilized microalga C. marina beads.
  N. Jeyaraj , M.R. Rajan and P. Santhanam
  The Common carp (Cyprinus carpio var. communis) is a potential culture species in fresh water ponds in India. However, growth of an industry around this species is constrained by poor survival during weaning from artificial diets. Hence, the present study was conducted to determine the dietary vitamin A requirement of Common carp (Cyprinus carpio var. communis) by formulating five different diets containing 0 (Control) 100, 200, 300 and 400 vitamin A. Each experimental diet was fed to triplicate groups of 10 fingerlings each with initial average weights of (1.48±0.26 g) maintained at 28±2°C for 30 days. The results revealed that feed consumption, protein consumption, feed conversion efficiency, protein efficiency ratio, growth, percentage growth, relative growth rate, Assimilation and metabolism was higher in feed IV containing 400 mg of vitamin A. Whereas higher gross growth efficiency and net growth efficiency recorded in feed II and feed I, respectively. The biochemical composition (%) such as moisture, protein and lipid of the fish significantly increased when the concentrations of vitamin A increased in the feeds. Interestingly, carbohydrate and ash content decreased with increasing concentrations vitamin A. Based on these results, it is recommended that the diet for fingerling Cyprinus carpio var. communis should contain vitamin A at a level of 400 mg for optimum growth, efficient feed utilization and profitability to farmers.
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