http://nopr.niscpr.res.in/handle/123456789/37164 Fri, 09 Oct 2026 03:16:44 GMT 2026-10-09T03:16:44Z http://nopr.niscpr.res.in/handle/123456789/37337 Title: Growth of staghorn coral Acropora aspera (Dana) (Scleractinia: Acropridae) in relation to environmental factors at Kavaratti atoll (Lakshadweep Islands), India Authors: Suresh, V R; Mathew, K J Abstract: Skeletal extension and calcification were measured over 2 years in branches of the staghorn coral Acropora aspera from a shallow-water site. Correlations were made between growth parameters and environmental variables monitored over the same period. Calcification varied significantly (9.4-17.4 mg. 28d(-1)) than skeletal extension (3.1-4.7 mm. 28d(-1)) and unlike extension, it varied significantly between seasons with lowest values during southwest monsoon (June-September). seasonal reduction in calcification was probably associated with the reduced availability of light due to increased cloud cover and sediments in water. Extension, however, seemed to be under the direct influence of currents and sediments. The effect of environmental factors seemed more critical to calcification. Page(s): 175-176 Fri, 01 Sep 1995 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/37337 1995-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/37334 Title: Copper induced alterations in total carbohydrate and protein levels in bivalve Sunetta scripta (Bivalvia) Authors: Katticaran, C M; Salih, K Y Mohammed; Joseph, P S Abstract: On exposure to higher concentrations of copper (0.3 to 1 ppm), a decline in carbohydrate level was noticed in Sunetta scripta only after prolonged exposure. The significantly higher protein levels in 0.3 ppm and 0.5 ppm copper exposed clams indicated the synthesis of metal binding protein. The digestive gland being the seat of intense biosynthetic activity, elevated protein levels in the tissue indicated its importance in the detoxification of toxic metals and the rapid turn over of metal binding protein from this organ and redistribution to other tissues. Binding of metals to such proteins accounted for the apparent indifference of the organism to high metal concentrations in the tissues. Metal binding proteins protect the organism from the toxic effect of metal and their presence can explain the high concentrations noticed in S. scripta. Page(s): 171-174 Fri, 01 Sep 1995 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/37334 1995-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/37327 Title: Heavy minerals of modern and relict sediments of the Nizampatnam bay, east coast of India Authors: Rao, P Sreenivasa; Satyanarayana, G; Swamy, A S R Abstract: Heavy minerals of the beach, sand-spit and palaeastrandline sediments of Nizampatnam bay are dominated by opaques, amphibiles and pyroxenes (70% of the total). Garnet, epidote and monazite are present in significant quantities (20%), whereas rutile, zircon and tourmaline are in appreciable amounts. Multiple regression analysis indicates that heavy mineral variations in each sedimentary environment have been significantly influenced by hydraulic fractionation by size, shape, density and by a selective chemical decomposition of unstable heavy minerals. A comparison of heavy mineral suites of the modern and relict sediments, derived from a common provenance, also shows mineral variations resulting from factors other than provenance. Page(s): 166-170 Fri, 01 Sep 1995 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/37327 1995-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/37325 Title: Distributional pattern of benthic foraminiferal morpho-groups in the shelf region off Mangalore : Environmental implications Authors: Khare, N; Sinha, R; Rai, A K; Nigam, R Abstract: The foraminiferal population in 45 surface sediment samples (20-86 m water depth) off Mangalore, was divided into benthic and planktonic assemblages. Within the benthic community based on the external test morphology, the population was further placed into two broad morpho-groups namely, angular-asymmetrical and rounded-symmetrical. The surficial distribution of these groups revealed that angular-asymmetrical forms are abundant in relatively deeper region whereas rounded-symmetrical forms flourish in nearshore regions. Such distinct distribution may be ascribed due to river borne turbulence. It further suggests that rounded-symmetrical forms favour high turbulence associated with increased fresh water river discharge in shallow regions. However, since fresh water river discharge is linked with precipitation over the catchment area, the results may show high potential in generating proxy data for the reconstruction of paleomonsoonal history through the study of morpho-groups in subsurface sediments of coastal regions, An anomaly in the distribution pattern is noticed off New Mangalore Port which is attributed to dredging for the navigational channel. Page(s): 162-165 Fri, 01 Sep 1995 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/37325 1995-09-01T00:00:00Z