Knowledge and achievement motivation of marine fishers : A case of alternate livelihood options in Tamilnadu

In recent past, farming of marine fishes is being encouraged among the marine fishers to supplement the household income from capture fisheries, because the fish catch is declining. The study on extent of knowledge and achievement motivation of marine fishers’ adopting alternate livelihood options like sea cage farming, seaweed farming and ornamental fish culture was conducted in Ramanathapuram district of Tamil Nadu since many marine fisheries related activities are being undertaken in larger scale in comparison to other coastal districts. Overall analyses on level of achievement motivation reveal that majority of respondents who are adopting the alternate livelihood options are having medium to high level of achievement motivation. All the farming options have to be undertaken in the sea, which is a common property and it demands a common consensus in a particular village or region for taking up an activity in a desirable and profitable way. Hence, the need for personal achievement was present in majority of fishers, followed by personal achievement oriented influence and need for social achievement. The study found that fishers were able to perform better in the knowledge test since they gained adequate knowledge on all the alternate livelihood options

On a Site of X-ray Emission in AE Aquarii

An analysis of recently reported results of XMM-Newton observations of AE Aqr within a hypothesis that the detected X-ray source is located inside the Roche lobe of the white dwarf is presented. I show this hypothesis to be inconsistent with the currently adopted model of mass-transfer in the system. Possible solutions of this problem are briefly discussed.Comment: 4 pages, accepted for publication in ApJ Letter

Fattening of mud crab: an approach of aquasilviculture in Andaman Islands

During September - December 2004, mud crab fattening was attempted in tide-fed earthen ponds in Lakshmipur (North Andaman) and Bamboo Tickri (Middle Andaman) with mangroves such as Rhizophora mucronata, R. apiculata and Avicennia marina, covering 60 to 80% of the total pond area. Water crabs of Scylla tranquebarica, S. olivacea and S. serrata, each weighing 500 - 1500 g were stocked in the pond at a density of 0.5 kg/m2 with suitable hideouts to reduce cannibalism. In 30 to 35 days, 85% survival was obtained with 8% weight increment. This paper outlines the measures that may be adopted for practicing aquaculture in mangroves

Cage Farming of Cobia Rachycentron canadum

Cobia has gained popularity as a good candidate for mariculture due to its rapid growth and white meat of versatile use. It is considered as one of the most promising candidates for warm-water marine fish aquaculture in the world. Being the only member of the family Rachycentridae, it is found in the warm, temperate to tropical waters of the West and East Atlantic, throughout the Caribbean and in the Indo-Pacific off India, Australia and Japan. To date, research and development of cobia aquaculture has been initiated in over 23 countries and territories

प्रजाति विविधीकरण – तटीय जलकृषि में स्थिरता सुनिश्चित करने का उपाय

कृपया पूरा लेखा पढ

Economic analysis of farming and wild collection of seaweeds in Ramanathapuram District, Tamil Nadu

The commercially important red alga Kappaphycus alvarezii is widely cultivated along Tamil Nadu coast. Apart from farming, wild collection of seaweed is also being practiced by fishers for their livelihoods. The present study on economics and constraints of farming and wild collection of seaweeds was undertaken in the Ramanathapuram District of Tamil Nadu, employing an expost-facto research design. The study found that the total cost of production for fabricating one bamboo raft (12 x 12 feet) was `1,050/-. The crop duration was 45 days and four to six crops were harvested in a year. The average yield was 200-260 kg per raft per crop. The price of harvested kappaphycus on wet and dry weight basis were `4 and `37.50 per kg respectively. Majority of seaweed farmers earned around `50,000/- to 1,00,000/- annually and the profit margin was 60%. The average gross revenue per trip per group of five members for wild collection of seaweed worked out to `6,700/- and the capital productivity was 0.30. It is interesting to note that about 20% of the respondents were those who left fishing and switched to farming and wild collection of seaweeds

E‐Book Tune‐Up: Maintaining, Sustaining, and Expanding Your Demand‐Driven E‐Book Program

Just like a car, an e‐book program needs continuous maintenance in order to run smoothly. What can we do to structure our e‐book collections to better meet institutional need? Many factors come into play in building a successful demand‐driven acquisition (DDA) program. Student preferences, actual use, collection development, and faculty/staff education and support are all important aspects of maintaining and sustaining a DDA program. This paper describes how the Furman University Library in South Carolina and the Metropolitan State University Library (Metro State) in Minnesota assessed and fine‐tuned their respective DDA programs, and the results of these changes

Evaluation of fatty acid profile with special reference to hypertension intake from marine edible fishes

The present study describes the changes in fatty acid profile in hypertension patients by up taking the marine edible fishes Elutherenema tetradactylum, Sphyraena obtusata and Siganus javus because these marine edible fishes are rich in ? –fatty acids.  In this study the total cholesterol, HDL and LDL were significantly decreased from 211.9 – 202.1 mg/dl, 177-159.6 mg/dl. The palmitic acid (C16:0) was found significantly higher in all of peoples compared with other SFAs. This study revealed that the most abundant in individual FAs 16:0,18:0,18:1 n9 and 20:2 n6 were present in blood in both before and after dietary intake. The minimal changes of SFAs levels were decreased averagely from 59.2 to 52.2%. In addition to above PUFAs also increased from 27.7-30.5%. The essential FAs like ALA (C18:3n3), EPA (C20:5n3) and DHA (C22:6n3) were accounting in the range of 2.64-2.92%, 3.67-3.94% and 3.65-4.38%. Omega – 6/3 ratio were recorded from 1.77-2.45%. This study proves the marine edible fishes reduce the hypertension of the patients. Keywords: Edible fishes, ? –fatty acids, SFAs, HDL and LD

Farming of Silver Pompano Trachinotus blochii in coastal aquaculture ponds

The Central Marine Fisheries Research Institute has initiated aquaculture research on pompano from 2008 and the first successful broodstock development, induced breeding and larval production was achieved in 2011. Following the successful seed production of silver pompano, demonstration of farming in brackishwater ponds was initiated by the CMFRI to popularize among the farmers about its suitability for aquaculture. The first farming demonstration from the hatchery produced seed was carried out in a coastal aquaculture pond at Anthervedi Village, East Godavari District, Andhra Pradesh. It has been proven that silver pompano can be cultured in the brackishwater shrimp culture ponds as an alternative species with high survival rate, appreciable FCR and meat quality. These fishes have attained an average weight of 450 grams in 240 days (8 months). Based on the experience gained on the brackishwater farming of silver pompano, the practices to be adopted for pompano farming are narrated

Efficient Global Optimisation of Microwave Antennas Based on a Parallel Surrogate Model-assisted Evolutionary Algorithm

Computational efficiency is a major challenge for evolutionary algorithm (EA)-based antenna optimisation methods due to the computationally expensive electromagnetic simulations. Surrogate model-assisted EAs considerably improve the optimisation efficiency, but most of them are sequential methods, which cannot benefit from parallel simulation of multiple candidate designs for further speed improvement. To address this problem, a new method, called parallel surrogate model-assisted hybrid differential evolution for antenna optimisation (PSADEA), is proposed. The performance of PSADEA is demonstrated by a dielectric resonator antenna, a Yagi-Uda antenna, and three mathematical benchmark problems. Experimental results show high operational performance in a few hours using a normal desktop 4-core workstation. Comparisons show that PSADEA possesses significant advantages in efficiency compared to a state-of-the-art surrogate model-assisted EA for antenna optimisation, the standard parallel differential evolution algorithm, and parallel particle swarm optimisation. In addition, PSADEA also shows stronger optimisation ability compared to the above reference methods for challenging design cases