Quality of eggs produced from wild and captive spawners of Penaeus Indicus H. Milne Edwards and their bacterial load

The seeds of Penaeus indicus H. Milne Edwards were produced following the modified Galveston system at a hatchery located at Narakkal near Cochin, India. Unilaterally eyestalk-ablated wild females were used for seed production. Some adult prawns collected from grow-out ponds attached to the hatchery were also used for breeding purposes. In all, 20 spawnings were observed in the present study. Poor-quality eggs and abnormal nauplii were observed, usually from the pond-reared eyestalk-ablated females during the period of investigation. The present study was carried out to describe different types of eggs based on morphology and to determine the bacterial load of eggs and its relationship with hatching rate

Aquaculture and Marine Biotechnology Programme in India

Marine biotechnology has been a major focus world-wide through bio-discovery of marine microbes, invertebrates, micro-algae and macro-algae. In the commercial production of bio-active molecules and pharmaceuticals it plays a pivotal role. The global market for products from marine biotechnology is expected to reach over US$ 4 billion by 2015 and therefore marine bio-resources emerging with a lot of scope for the health and well being of aquacultur

Transverse Mode Multi-Resonant Single Crystal Transducer

A transducer is disclosed that includes a multiply resonant composite, the composite having a resonator bar of a piezoelectric single crystal configured in a d(sub 32) transverse length-extensional resonance mode having a crystallographic orientation set such that the thickness axis is in the (110) family and resonance direction is the (001) family

Study of Literature by Students of Engineering Courses

The paper titled “Study of Literature by Students of Engineering” begins with an introduction on the importance of literature for communicative purposes and moves, highlighting the demands the global market has for engineers possessed with communicative competence in English. Mere terminology is not going to help engineers express themselves during all occasions. Literature, the mirror of life is not meant only for the students of science and humanities but also for those of engineering courses in order to have rosy future both in the world of technology with the knowledge of technology, and the world of Reality with the knowledge of literature.  Besides pinpointing the vacuum that can be appropriately filled with the study of literature, the paper justifies the incorporation of literature in the curriculum and the importance of study of literature for students of engineering courses. The paper advocates certain techniques that could be implemented in order to enhance the communicative competence of students in English through literature. It highlights the advantages of inclusion of literature in the text material in English for engineering students. The paper ends with the point that literature creates an ambience for engineering students to enlighten themselves with innumerable expressions that make a whale of difference in their communication. Keywords: literature, communicative competence, creativity, innovation, English syllabu

Experimental transmission and histopathology of brown spot disease in shrimp (Penaeus indicus) and lobster (Panulirus homarus)

The occurrence of shell disease in prawn and lobster is reported. Black lesion was observed on abdominal appendages and telson of larvae and adult Penaeus indicus and adult Panulirus homarus. Bacterial isolates belonging to the genus Vibrio, especially V. alginolyticus, were isolated. Vibno alginolyticus caused black lesion on abdominal segments of larvae in experimental transmission. Histopathological changes were observed in hepatopancreas, gut, and muscle of infected animal

Bioencapsulation and Colonization Characteristics of Lactococcus lactis subsp. lactis CF4MRS in Artemia franciscana: a Biological Approach for the Control of Edwardsiellosis in Larviculture

Predominance of beneficial bacteria helps to establish a healthy microbiota in fish gastrointestinal system and thus to reduce emerging pathogen. In this study, the colonization efficacy of Lactococcus lactis subsp. lactis CF4MRS in Artemia franciscana and its potential as a probiotic in suppressing Edwardsiella sp. infection were investigated in vivo. The colonization extent of the bioencapsulated L. lactis was established through visualization of gfp gene-transformed L. lactis in A. franciscana. Here, we demonstrate that when A. franciscana is administrated with L. lactis at 108 CFU mL−1 for 8 h, the highest relative percentage of survival (RPS = 50.0) is observed after inoculation with Edwardsiella sp. The total counts of L. lactis entrapped in Artemia were the highest (ranged from 3.2 to 5.1 × 108 CFU mL−1), when 108–109 CFU mL−1 of L. lactis was used as starting inoculum, with the bioencapsulation performed within 8–24 h. Fluorescent microscopy showed gfp-transformed L. lactis colonized the external trunk surfaces, mid-gut and locomotion antennules of the A. franciscana nauplii. These illustrations elucidate the efficiency of colonization of L. lactis in the gastrointestinal tract and on the body surfaces of Artemia. In conclusion, L. lactis subsp. lactis CF4MRS shows a good efficacy of colonization in Artemia and has the potential for biocontrol/probiotic activity against Edwardsiella sp. infection

Implementation of MHMIP and Comparing the Performance With MIP and DHMIP in Mobile Networks

Managing the mobility efficiently in wireless networks causes critical issue, in order to support mobile users. To support global mobility in IP networks The Mobile Internet Protocol (MIP) has been proposed. The Hierarchical MIP (HMIP) and Dynamic HMIP (DHMIP) strategies are also proposed for providing high signaling delay. Our proposal approach “Multicast HMIP strategy” limits the registration processes in the GFAs. For high-mobility MTs, MHMIP provides lowest mobility signaling delay compared to the HMIP and DHMIP approaches. However, it is resource consuming strategy unless for frequent MT mobility. Hence, we propose an analytic model to evaluate the mean signaling delay and the mean bandwidth per call according to the type of MT mobility. In our analysis, the MHMIP gives the best performance among the DHMIP and MIP strategies in almost all the studied cases. The main contribution of this paper is to implement the MHMIP and provide the analytic model that allows the comparison of MIP, DHMIP and MHMIP mobility management approaches

Studies on the pathobiology of penaeid larvae and postlarvae

Studies on the pathobiology of penaeid larvae and postlarvae. One of the major fac~ltors which influences the production and quality or seed in the hatchery and their subsequent culture in the grow-out system is tl!e uisczses and parasites affecting the stock. Under certain un fa-~surnble c~nditions~ diseases due to biotic and abiotic factors affect the iavYse ana postlarvae of penacid prawns. Further, these developing stages ale founu to be rrisre susceptible to diseases than the adult