907 research outputs found
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.  
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 (<100╬╝m), 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
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