Heavy landings of juveniles of grouper in trawl at Neendakara Fisheries Harbour, Kollam

Neendakara Fisheries Harbour is one of the major fish landing centres of Kerala. During August- December 2005, a large number of juveniles of the grouper Epinephelus diacanthus was landed by the trawlers. The average catch/hour was 1.5 kg (Table-1), estimated catch was 316 t and the estimated numbers was about 8301763 during this period

Unusual landing of whale shark Rhincodon typus at Neendakara Fisheries Harbour, Kerala

On 29-01-2010, a whale shark (Rhincodon typus) was landed at Neendakara Fisheries Harbour in Kollam District, Kerala. The shark was caught in Hooks and Line off Chavara. The specimen landed was a juvenile female shark measuring 4.15 m (TL) and 0.83 m (maximum body depth), weighing around 450 kg. The fish was hurriedly put in a lorry and taken away and hence detailed measurements could not be taken

Quantum discord and non-Markovianity of quantum dynamics

The problem of recognizing (non-)Markovianity of a quantum dynamics is revisited through analyzing quantum correlations. We argue that instantaneously-vanishing quantum discord provides a necessary and sufficient condition for Markovianity of a quantum map. This is used to introduce a measure of non-Markovianity. This measure, however, requires demanding knowledge about the system and the environment. By using a quantum correlation monogamy property and an ancillary system, we propose a simplified measure with less requirements. Non-Markovianity is thereby decided by quantum state tomography of the system and the ancilla.Comment: 5 pages, 3 figure

The Role of Natural Laccase Redox Mediators in Simultaneous Dye Decolorization and Power Production in Microbial Fuel Cells

Redox mediators could be used to improve the efficiency of microbial fuel cells (MFCs) by enhancing electron transfer rates and decreasing charge transfer resistance at electrodes. However, many artificial redox mediators are expensive and/or toxic. In this study, laccase enzyme was employed as a biocathode of MFCs in the presence of two natural redox mediators (syringaldehyde (Syr) and acetosyringone (As)), and for comparison, a commonly-used artificial mediator 2,2′-azinobis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) was used to investigate their influence on azo dye decolorization and power production. The redox properties of the mediator-laccase systems were studied by cyclic voltammetry. The presence of ABTS and As increased power density from 54.7 ± 3.5 mW m−2 (control) to 77.2 ± 4.2 mW m−2 and 62.5 ± 3.7 mW m−2 respectively. The power decreased to 23.2 ± 2.1 mW m−2 for laccase with Syr. The cathodic decolorization of Acid orange 7 (AO7) by laccase indicated a 12–16% increase in decolorization efficiency with addition of mediators; and the Laccase-Acetosyringone system was the fastest, with 94% of original dye (100 mgL−1) decolorized within 24 h. Electrochemical analysis to determine the redox properties of the mediators revealed that syringaldehyde did not produce any redox peaks, inferring that it was oxidized by laccase to other products, making it unavailable as a mediator, while acetosyringone and ABTS revealed two redox couples demonstrating the redox mediator properties of these compounds. Thus, acetosyringone served as an efficient natural redox mediator for laccase, aiding in increasing the rate of dye decolorization and power production in MFCs. Taken together, the results suggest that natural laccase redox mediators could have the potential to improve dye decolorization and power density in microbial fue

Impact of coastal bottom trawling on target and non- target resources along the south west coast of India

The trawling is carried out almost throughout the year in the inshore water except for peak monsoon months. Their nonoperation is chiefly due to the unfavourable sea conditions or bans imposed by the governments as in Kerala, Tamilnadu, Andhra Pradesh or socially self-imposed ban as in Karnataka. The excessive fishing pressure exerted by the mechanized / motorized sector in a climatically limited coastal habitat up to a depth of about 50 m have not only affected the sustenance of some easily vulnerable resources, but also challenged the very existence of some shell fishes, fin fishes and bottom organisms, including the biota which are non-edible to man but vital in the food web of all exploitable resources. The present account pertains to the impact of the gear along the south-west coast (Karnataka and Kerala) trawling grounds preferably on the non- target by catch

कोचीन मात्स्यिकी पोताश्रय में वर्ष 2010 के दौरान अवतरण किये सुरा और शंकुशों की प्रचुरता और विविधता पर विशेष परामर्श के साथ केरल की उपास्थिमीन मात्स्यिकी

कृपया पूरा लेखा पढ

EVALUATION OF HEPATOPROTECTIVE AND ANTIOXIDANT ACTIVITY OF Avicennia alba (BLUME) ON PARACETAMOL INDUCED HEPATOTOXICITY IN RATS

Objective: To study the hepatoprotective activity of ethanolic extracts of Avicennia alba leaves against paracetamol induced liver damage in rats. Methods: Hepatotoxicity was induced by paracetamol and the biochemical parameters such as serum aspartate amino transferase (AST), alkaline phosphatase (ALP), alanine amino transferase (ALT) and total bilirubin (SB) and the antioxidant such as Superoxide dismutase (SOD), Catalase (CAT), Glutathione Peroxidase (GPx), Glutathione (GSH), Vitamin-C & E and Thiobarbituric acid reactive substances (TBARS) were recorded and histopathological changes in liver were studied along with silymarin as standard hepatoprotective agents. Results: The phytochemical investigation of the extracts showed presence of alkaloids, flavonoids, tannins, terpenoids, proteins and steroids. Treatment with herbal extract to paracetamol administered rats caused a significant reduction in the values of AST, ALP, ALT and total bilirubin (P < 0.05) almost comparable to silymarin. The hepatoprotective was confirmed by histopathological examination of the liver tissue of control and treated animals. Conclusion: From the results it can be concluded that A.alba leaves possesses hepatoprotective effect against paracetamol-induced liver damage in rats

Marine fisheries in Gujarat

A brief account of marine fish landings in Gujarat during 1985- 95 is given in this paper. Contribution of different gears along with the CPUE and the regionwise as well as groupwise details are also presented. The status and prospect of marine fisheries ofihe state is discussed with the aid of last 5 decades landing data

Effect of Potent Ethyl Acetate Fraction of Stereospermum suaveolens Extract in Streptozotocin-Induced Diabetic Rats

To evaluate the antihyperglycemic effect of ethyl acetate fraction of ethanol extract of Stereospermum suaveolens in streptozotocin-(STZ-) induced diabetic rats by acute and subacute models. In this paper, various fractions of ethanol extract of Stereospermum suaveolens were prepared and their effects on blood glucose levels in STZ-induced diabetic rats were studied after a single oral administration (200 mg/kg). Administration of the ethyl acetate fraction at 200 mg/kg once daily for 14 days to STZ-induced diabetic rats was also carried out. The parameters such as the fasting blood glucose, hepatic glycogen content, and pancreatic antioxidant levels were monitored. In the acute study, the ethyl acetate fraction is the most potent in reducing the fasting serum glucose levels of the STZ-induced diabetic rats. The 14-day repeated oral administration of the ethyl acetate fraction significantly reduced the fasting blood glucose and pancreatic TBARS level and significantly increased the liver glycogen, pancreatic superoxide dismutase, and catalase activities as well as reduced glutathione levels. The histopathological studies during the subacute treatment have been shown to ameliorate the STZ-induced histological damage of pancreas. This paper concludes that the ethyl acetate fraction from ethanol extract of Stereospermum suaveolens possesses potent antihyperglycemic and antioxidant properties, thereby substantiating the use of plant in the indigenous system of medicine