NISCAIR Online Periodicals Repository Collection: IJMS Vol.40(5) [October 2011]

Sponge infestation on perna indica kuriakose and nair 1976 in experimental culture systems

Wed, 28 Sep 2011 22:58:59 GMT

Title: Sponge infestation on perna indica kuriakose and nair 1976 in experimental culture systems

Authors: Kumar, P. Sunil; Thomas, P.A.

Abstract: Infestation of the brown mussel, Perna Indica from Vizhinjam and Dalavapuram by the boring sponge was studied. Brown mussel from Vizhinjam recorded 23% infestation with Cliona lobata forming the dominant species (61%) followed by Cliona vastifica (26%), Cliona margaritifera (9%) and Cliona celata (4%). Brown mussel cultured in Dalavapuram recorded 18% infestation and the study revealed that Cliona vastifica is the only major pest in the area studied.

Page(s): 731-733

Floral survey of wet coastal and associated ecosystems of Maharashtra

Wed, 28 Sep 2011 22:58:59 GMT

Title: Floral survey of wet coastal and associated ecosystems of Maharashtra

Authors: Gokhale, M. V.; Shaikh, S. S.; Chavan, N. S.

Abstract: Maharashtra coast is 720 km long stretch interrupted with about 45 estuaries. There is formation of different types of habitat on this coastline. Each one is ecologically unique and inhabits some specific floral components. Present paper reports occurrence of different plant species in the habitat like sandy beach, sand dune, encroached mangrove land, areas along the mangroves and mangrove swamps. Mangrove species are well documented and therefore excluded. There are 33 trees, 118 herbs, shrubs, climbers and 12 species with restricted distribution on the coast of Maharashtra.

Page(s): 725-730

Design and general characteristics of sole fish gill nets of Ratnagiri, Maharashtra

Wed, 28 Sep 2011 22:58:59 GMT

Title: Design and general characteristics of sole fish gill nets of Ratnagiri, Maharashtra

Authors: Kazi, Tousif G.; Mohite, Ashish S.; Jadhav, Rakesh R.

Abstract: Gill net fishing is one of the popular fishing methods along the west coast of India. However, there are regional variations in their design, construction and operation. This paper deals with design and general characteristics of sole fish gill nets operated from Ratnagiri, Maharashtra. Main webbing of sole fish gill net was made up of material polyamide (PA) monofilament of 0.23 mm diameter and the mesh size varied in between 75 to 85 mm. Sole fish gill nets were set nets, operated near the coast mostly after monsoon season when the water was turbid. In Ratnagiri, the nets were fabricated with the hung length and hung depth which varied from 58.5 to 70.38 m and 3.42 to 3.92 m respectively. The total fleet length varied from 130 to 160 m. The sole fish gill net was operated in the depth ranging from 6 to 15 m. It was calculated that, average area covered by each unit in bottom set sole fish gill net was 213.85 m². Ten to twenty number per unit of plastic or expanded polyvinyl chloride (PVC) floats were used on head rope and oval shape lead sinkers of 20 to 23 g weight and 72 to 100 number per unit were used on foot rope. Sole fish gill nets were locally known in marathi as “Lepechi jali”.

Page(s): 722-724

Extracellular production of L- Glutaminase by marine alkalophilic Streptomyces sp.-SBU1 isolated from Cape Comorin coast

Wed, 28 Sep 2011 22:58:59 GMT

Title: Extracellular production of L- Glutaminase by marine alkalophilic Streptomyces sp.-SBU1 isolated from Cape Comorin coast

Authors: Krishnakumar, S.; Rajan, R. Alexis; Ravikumar, S.

Abstract: Actinomycetes were isolated from marine sediments of Cape Comorin coast (Lat.8° 21’ N and Long 77°30’E), India for extracellular L-glutaminase production. Out of 25 isolates screened, the strain Streptomyces sp.-SBU1 showed promising L-glutaminase activity. Maximal L-glutaminase activity (18.0 U/ml) was observed in a medium supplemented with 2% NaCl (w/v) and 1% malt extract (w/v) as nitrogen source, 1% glucose (w/v) as carbon source, the initial pH of 9.0 at 30°C after 96 h of incubation was found to be optimal culture condition by the strain Streptomyces sp.-SBU1. So for only few marine actinomycetes have been explored for their L-glutaminase production. Hence the present study was initiated to optimize the media composition for L-glutaminase production.

Page(s): 717-721