Role of reproductive bodies of algae as ultra microscopic food of larval and planktonic animals: a new finding in environmental science

Scientis ts believe that the bivalve larval reed on diatoms, detritus etc. When large scale spawning of these animals happens in the sea releasing million of larvae into the environment, no noticeable change is observed in the environment to show a boost of the feed material and it is also out of question that these millions of larvae are feeding on the dia toms of the sea which arc larger in size than the larval forms

Multi crop farming system for farming marine animals for producing medicines

It is well known that all physicians who practised Ayurveda, Allopathy, Homoeopathy, Sidha, Unani, etc. were to depend on the phamlacopea systems of preparing medicinesfrom extracts of plants, minerals and elements in the crude forms as well as in the most sophisticated forms even from the pre-vedic periods dating back to 5000 to 7000 BC. Due to the recent advancements in the modern medicines, a new branch of science has been evolved for extraction of bio-active agents or substances from marine organisms and scientists developed many life saving medicine

A new and simple medium for phytoplankton culture

Results of the study using a simple medium with a higher concentration of phosphate, developed for isolating unicellular algae from Calicut region are presented in this paper. The new medium is found to be very simple for large scale culture of phytoplankton to develop larval feed in hatcheries. The medium is prepared by dissolving 350 mg of potassium di hydrogen phosphate and 900 mg of p'otassium nitrate in 125 ml di stilled water. One ml of this solution is added to a litre of boiled and filtered sea water. A stock solution of vitamin is made by dissolving 5 mg of B" and 95 mg of B, in 100 ml of distilled water and one ml of this solution is added to each litre of the nutrient mixed sea water. Chromulina sp. Pavlova sp. and Chlorella sp. are inoculated in 250 ml flasks containing the new medium and is simultaneously compared with another set of flasks containing Walne's medium under controlled conditions of light and at a temperature rangong from 28 to 30· C. After every twenty four hours, cell counts are made and it is observed that rapid multipli.:ation of cells occurs during the initial period itself and the exponential phase is continued from the sixth day upto 12th day with similar results in both the media. The results with dirt·erent concentrations of the nutrients in the new medium are also presented in the paper

System design for mussel culture

Mussel culture has been proved as one of the feasible progress for large-scale production of cheap protein food in many of the European countries having considerable potential for production to the tune of 600 tonnes/hectare as is reported from Spain

Applied ecology - a new discipline to be developed to support aquaculture

Aquaculture or cultivation in water has become a common practice in almost all countries during recent times in the context of the limitations of harvest from the sea, or from freshwater bodies. Planned development by modern approaches in this sector will normally make it possible for organising aquaculture in the same way as agriculture and in many countries large scale cultivation of fish, edible oysters, mussels, Prawns, pearls, algae etc. are streamlined on industrial basis with proper management networks at production, marketing and at consumer levels

मानसून के दौरान बुकानीर ऐंचोवी का उपतट प्रवास

कृपया पूरा लेखा पढ

The clam resources

Che estuaries and backwaters along the coasts of India have immense clam resources which have been traditionally exploited by the coastal people. The clams form the basis of subsistence for the fishermen during seasons when sea fishing is at a low ebb and clam fishing is a regular activity in many coastal regions of Maharashtra, Goa, Karnataka and Kerala on the west coast. Along the east coast, clam fishing is restricted to a few centres such as the Kakinada Bay although, here and there, they are collected for culinary purposes elsewhere. This is an activity where, besides men and women, children participate. Clam marketing is highly localised in centres of collection. Apart from introduction of improved clam-scooping devices, the fishing method of hand-picking has largely remained unchanged over the years

A MODIFIED C-DUMP CONVERTER FOR PMSM MACHINE USED IN A FLYWHEEL ENERGY STORAGE SYSTEM

This paper presents a modified C-dump converter for permanent magnetic synchronous (PMSM) machine used in the flywheel energy storage system. The converter can realize the energy bidirectional flowing and has the capability to recover the energy extracted from the turnoff phase of the PMSM machine. The principle of operation, modeling, and control strategy of the system has been investigated in the paper. Simulation and experimental results of the proposed system are also presented and discussed

Shallow sea bottom farming: Multicrop system developed at Vizhinjam

Even though marilculture technology for various organisms like mussels, pearl oysters, lobsters and crabs has been developed during the last three decades by the CMFRI and several other institutions in India, there has been considerable practical difficulties for commercialising these programmes in Indian waters due to the rough weather conditions during the two monsoon periods as well as due to the nonavailability of adequate protected bays along the Indian coasts

Studies on new or little known Polychaetes from the Indian seas. 2. Micromaldane jonesi n. Sp. (Maldanidae)

The genus Micromaldane is represented by two species, Micromaldane ornithochaeta Mesnil (1897) from France (Atlantic coast) and M. bispinosa Hartmann-Schroder (1960) from Gardaqa (Red Sea). M. ornithochaeta has subsequently been reported from North Atlantic and Irish Sea by various workers (Fauvel, 1927 ; Southward, 1956 ; and Hammond, 1966), from Cape Margerie, Adelie coast Antarctica by Fauvel as reported by Hartman (1966) and from the coast of British Columbia by Berkeley, E. & C. (1962)