Utilization of natural byproducts for the cultivation of blue-green algae

The work of Allen, Gross and Harveyo has proved t he importance of trace elements as essential auxiliaries of the major nutrients, Ca, K, Mg, Na, Cl, S, P and N in the metabolism of planktonic organisms including diatoms. In their studies extracts of Ulva and Fucus, unsuspected as sources of trace elements, were actually found to induce the growth in cultures of diatoms in artificial sea-water

Application of satellite data for marine Fishery forecasting

The sharing of the pelagic and demersal common property fishery resources of the coastal waters has created considerable tensions, law and order problems and conflicts among various fishing sectors in the recent past. Fishes are known to react to changes in environmental conditions and migrate to areas where favourable conditions in terms of seawater temperature, dissolved oxygen and salinity exist. Monitoring of these parameters in space and time is time consuming and prohibitively expensive. Indirect method of monitoring selected parameters such as sea surface temperature and phytoplankton pigments is found very ideal in view of its high repetivity and spatial coverag

Present Status of MaricuIture in India

Aquaculture, the farming of aquatic animals and plants has been the world's fastest food production system for the past decade with an average compound growth rate of 9.6% per year since 1984. On the basis of the rapid growth of the aquaculture sector and recent stagnation of landings from capture fisheries, aquaculture is seen by many as a potential source of hope to meet the current and future needs of a growing population in search of food

Fermentation process for the production of quality fish meal

Fishy odour of shark liver oil is completely removed as a result of agitation of the oil with fermenting milk for 36 hours. This suggested the possibility of preventing the development of rancidity in fish meals by the treatment of the raw material with fermenting mil

മത്സ്യബന്ധന മേഖലയിലെ പ്രവചനസാധ്യതകള്‍ (Potential fishing zones in the marine environment)

As in the case of terrestrial animals, the marine fauna including fish also respond, in varying degrees, to changes in the environmental conditions. The physical parameters such as sea water temperature, density, hydrostatic pressure, horizontal and vertical movements of water masses, the intensity of solar radiation and chemical parameters including the saltiness of seawater, dissolved gases and biological factors such as the availability of food and occurrence of predators decide the occurrence, distribution, abundance, reproduction and mortality of individual species in space and time

Indian marine capture fisheries - present trends and future possibilities

In India, the last few decades’ fisheries research together with technological advancement in the harvest and post harvest scenario has accelerated the processes of transformation of a subsistence oriented traditional sector marine capture fisheries into a market oriented multi-crore industrial sector activity with considerable strength and capabilities in essential infrastructures

Chemical composition of lagoon muds

It has been shown in earlier communications (Krishna Pillai, 1954, -1955) that the conditions existing in salt-water lagoons bear no similarity to those found either in open sea or in fresh-waters and that productivity in the lagoons is controlled by factors that difrer in nature and degree of in.fluence from those of the natural environment

Oceanographic aspects of Lakshadweep waters in relation to skipjack tuna fisheries

The variations noticed on important oceanographic parameters such as surface currents, seawater temperature. salinity and dissolved oxygen content of waters around Lakshadweep group of islands are discussed in brief. An attempt is made to correlate selected parameters with the occurrence/abundance of Skipjack tuna catches in and around the islands. It is observed that apart trom factors such as sea water, temperature and salinity, the resultant effect of the phenomenon of 'upwelling ' mainly caused by diverging current systems contribute towards concentration of Skipjack tuna in certain localities. It may be possible that fishing areas for Skipjack tuna could be predicted sufticiently in advance by monitoring the formation and shifting of divergence zones around these islands during the period, November - March, the season for the Skipjack tuna fishery. The possibilities of utilising Satellite Remote Sensing data to locate thermal boundaries, resulting out of divergence, is also suggested

Water - soluble constituents of Gracilaria lichenoides

The seasonal variation in the water- soluble constituents of Gracilaria Iichenoides collected from. Palk Bay has been studied. An economic method has been worked out for the extraction of agar from the seaweed