Unusual occurrence of large size oilsardine (Sardinella longiceps) at Karwar, Uttar Kannada coast of Karnataka

The oilsardine, Sardinella longiceps (Valenciennes, 1847), is a major pelagic fishery resource of Malabar and Konkan coast. At Karwar, the fishing season for oilsardine is from August-May and the peak season is from October to March. During the current year, after the ban period, the oilsardine fishery by the purseseine boats started from the first of August, 2011

Vibration Analysis of Silencer Based on FEM and FFT Analyser

Silencer was considered with and without modifying in order to reduce the vibration. Design and modeling have been done with specifying different material properties. Finite Element Method was used for the modeling and simulations. The harmonic analysis has been performed by using ANSYS 18.0. The natural frequency and working frequency are the very important parameters to study the resonance. It is mandatory to avoid this resonating condition. These frequencies are distinguished with the help of ANSYS 18.0

Bacterial Flora of Water and Rotifers in Outdoor Mass Culture Tanks Fed with Different Microalagal Diets

Investigations were carried out on the bacterial flora of water and the quality of rotifers in outdoor mass culture tanks. Brachionus plicatilis and B. rotundiformis were cultured in 10 numbers of 1 tonne tanks and the physico-chemical parameters and microbial loads of water, and total bacterial and Vibrio loads of microalgae and rotifers, during the period 2014-15, were studied. The study revealed a significant variation of the ammonia levels and total bacterial loads with different diets (P < 0.05). A positive correlation was observed between the total bacterial loads of algal concentrations and loads of rotifers, but no correlation was observed between Vibrio loads of water and rotifers. The prevalence of Vibrio loads of rotifers was low in tanks fed with Nannochloropsis oculata and maximum Vibrio loads were recorded in Chaetoceros calcitrans fed rotifers. The Vibrio loads significantly varied with days of culture and also with the algal diets. A positive correlation was observed between the total Vibrio loads of water and rotifers

Experimental studies on Macro fouling communities on net panels at marine cage farm of Karwar, India

A study was undertaken on the fouling pattern, monthly settlement and species dominance at marine cage culture during the year 2014-2015. The net panels deployed at three different depths during December 2014 and the study was carried out for seven months. The study revealed wide variations in colonization of the bio-foulers, the density varied between 2-260/cm2. The overall density was found to be more in bottom panels (6mt) compared to the top (1mt) and middle panels (3mt). The overall dominant species were hydroids and barnacles throughout the culture period. In the top panels, hydroids were dominant (91.67%) during December, followed by barnacles and amphipods. Additionally, complete dominance of barnacles was observed in the middle panel during May. Barnacles were found dominant (93.75%) on the bottom panels during March, followed by hydroids and crabs. The study underscored that barnacles formed a major contribution of the fouling organisms throughout the culture period. Significant variation in the occurrence and abundance of fouling organisms was observed, between the depths at cage sit

Environmental monitoring in Sea cage culture

Cage culture is a fast growing industry all over the world and demands good environmental practices to assure sustainability. The sustained development of coastal aquaculture has reached a good understanding with the environment, respecting it and undertaking actions that tend to diminish the possible impacts that may arise from this activity. In order to do so, measures are to be taken in production to avoid degrading the environment, whilst still being appropriate, economically viable and socially acceptable. In this sense, it has been considered necessary to develop some basic environmental strategies to assure the best site for the aquaculture purposes, avoiding possible confrontations with other coastal uses

K+ Ions Crosslinked Kappa-Carrageenan/Methylene Blue Composite Film. Part-1: Synthesis, Characterization and Application as Controlled Release Device for Photodynamic Therapy Application

K+ ions crosslinked (KC/MB) Methylene blue photosensitizer loaded composite film is prepared for photodynamic therapy (PDT) application as Photosensitizer released by composite film can conveniently be controlled by using different quantities of K+ ions and this application is based on dynamic interaction between light with suitable wavelength, photosensitizer and molecular oxygen, promoting the death of the target tissue or bacterial cells. In this work, the Methylene Blue (MB) loaded Carrageenan polymeric film was prepared by the method of direct addition of MB into pre-polymerization solution of Carrageenan (KC). This composite film and plain KC film were characterized by FTIR, XRD and SEM analysis. The characteristic peaks of MB photosensitizer were obtained in FTIR spectrum of composite film. The composite film KC/MB shows prominence of amorphous nature may be due to MB is present in very small quantity. The SEM analysis reveals that the composite film (KC/MB) having much more smooth surface texture throughout the film. Finally, the result of effect of variation in degree of crosslinking on amount of MB release is, as the amount of K+ ions used to crosslink the film increases, MB release decreases.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp

Seasonal and annual variations in fish and macro-crustacean fauna in the shore seine fishery of Karwar, Karnataka

Karwar coast of Karnataka is known for sandy beaches, and these beaches apart from providing the aesthetic beauty, are supporting traditional fishermen of the coast for finding their livelihood avenues. Traditionally the beaches of Karwar is known for shore-seine operations, known as rampani fishery. Rampani nets were made of coir ropes and the nets were operated from October to March, exclusively targeting mackerel and sardines

Diffusion with critically correlated traps and the slow relaxation of the longest wavelength mode

We study diffusion on a substrate with permanent traps distributed with critical positional correlation, modeled by their placement on the perimeters of a critical percolation cluster. We perform a numerical analysis of the vibrational density of states and the largest eigenvalue of the equivalent scalar elasticity problem using the method of Arnoldi and Saad. We show that the critical trap correlation increases the exponent appearing in the stretched exponential behavior of the low frequency density of states by approximately a factor of two as compared to the case of no correlations. A finite size scaling hypothesis of the largest eigenvalue is proposed and its relation to the density of states is given. The numerical analysis of this scaling postulate leads to the estimation of the stretch exponent in good agreement with the density of states result.Comment: 15 pages, LaTeX (RevTeX

Evaluation of the IS6110 PCR assay for the rapid diagnosis of tuberculous meningitis

This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens

Standardization of culture aspects of Apocyclops cmfri sp. nov. a native cyclopoid copepod

Copepods are considered as ideal larval feed, due to their smaller size (<100μm), high protein and favourable fatty acid profiles. There are three types of copepods viz., harpacticoid, calanoid and cyclopoid, which can be cultured on a large scale under controlled conditions as live feed for the initial stages of fish and shellfish larvae. Karwar Research Centre of ICAR- CMFRI made a significant contribution in standardizing the protocols for the culture of a new cyclopoid copepod