NISCAIR Online Periodicals Repository Collection: IJMS Vol.41(3) [June 2012]

Production of alpha amylase by mangrove associated fungi Pestalotiopsis microspora strain VB5 and Aspergillus oryzae strain VB6

Tue, 29 May 2012 22:58:59 GMT

Title: Production of alpha amylase by mangrove associated fungi Pestalotiopsis microspora strain VB5 and Aspergillus oryzae strain VB6

Authors: Joel, Elsa Lycias; Bhimba, B. Valentin

Abstract: Present study elucidates a-amylase production by mangrove fungi at different pH. Neutral and alkaline pH did influence the highest enzyme activity. Optimal pH for amylase production for the two species was found to be pH 6.4 and pH 6. According to the sequence of the internal transcribed spacer (ITS) region, the isolates were identified as Pestalotiopsis microspora VB5 and Aspergillus oryzae strain VB6.

Page(s): 279-283

Benthic macroinvertebrate community structure and distribution in the Ayeyarwady continental shelf, Andaman Sea

Tue, 29 May 2012 22:58:59 GMT

Title: Benthic macroinvertebrate community structure and distribution in the Ayeyarwady continental shelf, Andaman Sea

Authors: Ansari, Z.A.; Furtado, Ramila; Badesab, Shahin; Mehta, Pratik; Thwin, Swe

Abstract: Quantitative assessment of macrofaunal community of Ayeyarwady continental shelf, Andaman Sea was studied during the coastal resource survey during April-May 2002. About 27 major taxa were identified. Abundance of fauna was in the order of polychaeta (34.2%), crustacean (25.7), mollusca (4.2%) and echinodermata (4.5%), forams 30.3% and other groups 1.1%. Faunal density ranged from 59 to 6027/m² and the wet weight biomass from 0.01 to 43.47 g/m². Funa was dominated by polychaeta with 100% prevalence. Faunal composition differed along the depth gradient of habitat heterogeneity. Macrofaunal abundance during this study was within the range reported for shelf water of Burma and Andaman Sea but were higher than those from the South China Sea. Major shift in the quantitative distribution and spatial heterogeneity was due to several environmental factors.

Page(s): 272-278

Impact of non-selective gears on kingseer, Scomberomoruscommerson fishery in Karnataka

Tue, 29 May 2012 22:58:59 GMT

Title: Impact of non-selective gears on kingseer, Scomberomoruscommerson fishery in Karnataka

Authors: Dineshbabu, A.P.; Muthiah, C.; Sasikumar, Geetha; Rohit, Prathiba; Bhat, Uma S.

Abstract: Catch-length analysis of kingseer, Scomberomorus commerson from motorised (drift gillnets) and mechanized (purseseine and trawl) fishing operations in Karnataka from 2004 to 2009 was analyzed. Length composition varied in different gears with smaller fishes being predominant in trawl (59.6%) followed by purseseine (39.2%). In drift gillnet young ones formed only 1.2%. Thompson and Bell model predictionsof kingseer stock in the multifleet fishing scenario were attempted to examine the effects of the motorized and mechanized efforts on the maximum economic yield (MEY) by simulating different effort combinations. Theoretical economic yield obtainable from the drift gillnet fishery alone was obtained at 60% of the current F is (48.1%). This yield is much higher than those obtained from the present multi-gear fishery. When the drift gillnet and purseseine efforts are varied while avoiding the exploitation of juveniles in trawl, 28% increase in MEY is predicted at Rs. 1,087 million. Hence a reduction in the effort expended, by restricting trawl and purseseine operations and retaining the large meshed drift gillnets (65-170 mm) at MEY levels will result in maximum economic returns and for sustainability.

Page(s): 265-271

Flavonoids and phenolic compounds in two mangrove species and their antioxidant property

Tue, 29 May 2012 22:58:59 GMT

Title: Flavonoids and phenolic compounds in two mangrove species and their antioxidant property

Authors: Asha, K.K.; Mathew, Suseela; Lakshmanan, P.T.

Abstract: In the present study the content of phenolic compounds and flavonoids in root extract of Rhizophora apiculata and Acanthus ilicifolius was determined, their antioxidant property was assayed and the protective effect of R. apiculata root extract on induced-oxidative stress was examined. R. apiculata and A. ilicifolius root extracts were found to be rich sources of phenolic compounds and flavonoids. DPPH free radical scavenging assay has shown that R. apiculata has a better antioxidant activity than A. illicifolius. R. apiculata root extract had protective effect on sodium nitrite-induced oxidative stress in brain of rats. The extract normalized the sodium nitrite-induced alterations in the levels of glutathione, lipid peroxides and antiperoxidative enzymes like catalase and superoxide dismutase. Mangrove root extract had a beneficial effect in ameliorating oxidative stress in the brain of rats which may be attributed to the presence of flavonoid and polyphenolic compounds.

Page(s): 259-264