http://nopr.niscpr.res.in/handle/123456789/36359 2026-10-09T19:43:30Z http://nopr.niscpr.res.in/handle/123456789/37115 Title: Wood-boring organisms from Valapattanam backwaters, south west coast of India Authors: Nair, N Balakrishnan Abstract: Dicvathifer manni, Lyrodus pedicellatus, Teredo furcifera, Nausitora hedleyi, Bankia campanellata, of the Teredinidae; Martesia striata, M. (Particoma) nairi of the Pholadidae and Sphaeroma terebrans, S. annandalei of the Sphaeromatidae were the species active in the area. The most destructive group was sphaeromatids forming as much as 85.4%. Maximum incidence of L. pedicellatus was noted towards the low saline areas while D. manni and T. furcifera exhibited a different reaction preferring areas around the bar-mouth where the salinity was maximum, the former attacking even live mangroves. M. (P.) nairi and S. terebrans were very common both exhibiting tolerance to wide ranges of salinity. It was observed that different species effectively avoided competition and thus shared the limited wood substratum available in the estuary through their salinity preferences. Page(s): 170-172 1996-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/37114 Title: Infestation of pearl oysters by boring and fouling organisms in the northern Persian Gulf Authors: Doroudi, M S Abstract: Infestation of the pearl oysters Pinctada margaritifera and Pinctada radiata by boring and fouling organisms at pearl culture farms, as well as in the wild, was studied on the northern coast of the Persian Gulf. Barnacles, spat of edible oysters and tubiculous polychaetes were major fouling organisms in the pearl culture farms. In natural beds, however, fouling sponges, algae and ascidians were considered to be the main fouling organisms. The sponge Cliona and mussel Lithophaga were the most destructive boring organisms encountered causing considerable damage to the shells. Page(s): 168-169 1996-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/37113 Title: Culture of a marine cyanobacterium Phormidium tenue (Myxophyceae/Hormogonales) Authors: Palaniselvam, V; Kathiresan, K Abstract: Phormidium tenue from mangrove and shrimp pond ecosystems was studied for biomass production. The specie's grew well under laboratory conditions in the marine nutrient (MN) medium incorporated with urea (92 mu g.l(-1)), superphosphate (24.7 mu g.l(-1)) and potash (4.94 mu g.l(-1)), maintained at a salinity of 40 x 10(-3), pH 8 and light intensity of 160 J.s(-1). Under field conditions, the species did not require any addition of nutrients to the MN medium, but only shaded condition and 15 cm of water depth for better biomass production. Page(s): 165-167 1996-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/37112 Title: Shallow water bottom sediment trap - A novel approach Authors: Fernandes, B; Nayak, G N Abstract: An attempt was made to design and fabricate a sediment trap to study the sediment flux in a shallow water body, The instrument consists Of a pole standing on a tripod structure with concrte cones at the base, The trap is a cylinder which can be clamped to the pole at different levels. While the trap is better suited for shallow waters, the base stand system can also be used as a mooring in deeper waters. Page(s): 163-164 1996-06-01T00:00:00Z