Cardiac myxosporiosis of pearl-spot, Etroplus suratensis (Bloch), due to Myxobolus etropli sp. nov.

A new myxosporea, Myxobolus etropli sp. now, was found to infect the bulbus arteriosus of Etroplus suratensis from brackishwarer lasoons of Muaulkadu. Chenna

Change in the room temperature magnetic property of ZnO upon Mn doping

We present in this paper the changes in the room temperature magnetic property of ZnO on Mn doping prepared using solvo-thermal process. The zero field cooled (ZFC) and field cooled (FC) magnetisation of undoped ZnO showed bifurcation and magnetic hysteresis at room temperature. Upon Mn doping the magnetic hysteresis at room temperature and the bifurcation in ZFC-FC magnetization vanishes. The results seem to indicate that undoped ZnO is ferromagnetic while on the other hand the Mn doped ZnO is not a ferromagnetic system. We observe that on addition of Mn atoms the system shows antiferromagnetism with very giant magnetic moments.Comment: 5 figure

Fish health management in cage aquaculture

Finfish is the primary source of animal protein for humans in many parts of the world and per capita consumption of fish has been increasing from an average of 9.9 kg in the 1960s to 19.2 kg in 2012 (FAO, 2014). Growing global population, dwindling natural fish stocks, and the increasing demand are the major drivers for increasing fish production. Aquaculture remains the only option to meet these demands and globally, the share of aquaculture is projected to rise to 62% of the total fish production by 2030. However, considering the limitations of the traditional aquaculture systems due to environmental issues, carrying capacities etc., it has been recognized that cage culture, especially mariculture has many advantages. Over the years, cage culture has become one of the economically viable methods of large-scale production of high-value food fishes

Experimental host range and histopathology of white spot Syndrome virus (WSSV) infection in shrimp, prawns, crabs and lobsters from India

Experimental studies were conducted by injecting of feeding white spot syndrome virus(WSSV) derived from infected shrimp, Penaeus monodon fabricius collected from the South East coast of Indi

Appraisal on the marine fishing craft and gear of the Indian coast

The use of fishing methods varying from simple traps to large trawlers and from hand lines to sophisticated purse seines is a typical feature of marine fisheries in India. The regional and seasonal variation is so vast that the developmental agencies and administrative machinery are often handicapped in deciding priorities on modernizing the traditional tools. A document as attempted here, would form a piece of vital information for the R&D agencies. The traditional gear operated in different regions of the Indian coast are classified based on the mode of operation and an exhaustive listing along with local names is attempted. Besides, contributions to the marine fish production separately by traditional and modern craft are brie flu noted

White spot syndrome virus (WSSV) infection in tiger shrimp Penaeus monodon: A non-lethal histopathological rapid diagnostic method using paraffin and frozen sections

White spot syndrome virus (WSSV) infection was induced in tiger shrimp, Penaeus monodon, under laboratory conditions, and histopathological changes in subcuticular epithelial cells of the eye stalk and pleopod were studied sequentially at different time post-challenge. Routine histological techniques using paraffin embedded tissues, as well as frozen tissues, were used to document WSSV infection. Histological manifestations such as cellular hypertrophy in the subcuticular epithelial cells of the eyestalk and pleopod could be detected as early as 18 h postinfection (p.i.) before the manifestation of clinical signs of the diseas

Macro micronutrients and Antioxidant Potentials of Plants and Fungal based Food from Tawang Area Arunachal Pradesh India

Certain variety of plants such as vegetables, spices and seaweed are abundantly being grown in high altitude cold desert region of Tawang in Arunachal Pradesh, India. Therefore, five different vegetables, spices and seaweed were taken from that particular cold region viz., finger millet, nori seaweed, pepper corn, bean and mushroom have been selected based on the higher consumption of people of Northeast (NE) India for the proximate analysis, mineral, antioxidant and vitamin contents. So far, there is no nutritional composition studies have been carried out with available vegetables, spices and seaweeds growing in NE. For this reason, this study was undertaken to determine the macro and micro nutrients and antioxidant potential of these plant foods. Different analyzed varieties were significantly different for proximate composition and mineral content, and each variety showed significant differences. Common bean showed higher percentage of protein with 35.09% and fat percentage of the finger millet is higher (9.2%) as compared to other varieties from other regions (1-1.5%). Higher crude fibre was assessed in mushroom with 47.77% followed with pepper corn (38.42%), bean with 30.987%, and finger millet (5.14%).Calcium was higher in finger millet with 225 mg per 100g whereas iron content was higher in mushroom with 652 mg followed with beans (543 mg), pepper corn (408 mg per 100g). Higher amount of polyphenols observed in finger millet with 8.716 µg (GAE)/mg and highest total flavonoids in pepper corn with 48.196 µg (RU)/ml. Likewise, highest FRAP in finger millet noticed with 72.0 µg of FeSO4 equivalent /mg and reducing power (ascorbic acid equivalent /mg) in mushroom (244.0) and pepper corn (242.0). All samples had higher metal chelating activity between 86.657- 83.383 IC50 µg. Similarly, higher amount of vit B6 was noted in pepper corn with 197.0 mg while lowest in seaweed with 1.76 mg/100gm. &nbsp

ENHANCED PHOTOLUMINESCENCE OF ZnS NANOPARTICLES DOPED WITH TRANSITION AND RARE EARTH METALLIC IONS

Pure and doped ZnS nanocrystalline phosphors were prepared at room temperature using a chemical synthesis method. Transmission electron microscopy observation shows that the size of the ZnS crystals is in the 2-3 nm range and SAED pattern confirms the cubic and crystalline nature of the observed samples, which are in agreement with X-Ray analysis. Interesting luminescence characteristics such as strong and stable visible-light emissions were observed from the doped ZnS nanocrystals at room temperature whereas dominant UV emissions were observed for pure ZnS. These results strongly suggest that impurities, especially transition metals and rare-earth metals-activated ZnS nanocrystals are useful in the field of optoelectronics