पर्यावरण अनुकूल ग्रूपर पालन प्रौघोगिकियाँ – नया आशा किरण

कृपया पूरा लेखा पढ

Stock culture maintenance and mass culture of micro algae

Marine micro algae are found in marine systems living both in water as well as in sediment have an important role in ecological pyramid of the marine ecosystem. These are the base of the trophic web and provide energy for all successive trophic level in the marine eco system. These are single celled, chlorophyll bearing organisms uses solar energy and nutrients from water to convert it into organic matter. Out of 8 Lakhs species of different genera of algae available from marine ecosystem very few have been tapped for their use as availability of biomedical compounds and also as feed in different finfish, shellfish and molluscan hatchery. Their role is also very much vital and critical in a successful mariculture hatchery management. An alga serves as a feed for other zooplanktons and also added to the larval rearing tanks to improve quality of water as green water technology. Among microalgae, flagellate and diatom species are cultured in hatcheries in suitably treated seawater enriched with nutrients such as nitrates, phosphates, essential trace elements and vitamins. To support growth of high densities of larvae and juveniles reared in the hatchery high density of micro algal culture is essential. Considering the importance of marine algal culture, different indoor laboratories and outdoor mass culture systems being carried out in various hatcheries in world like Japan, Taiwan, China, Philippines, Indonesia as well as India

సముద్రములో చేపల సాగుకు అవసరమైన మూరింగుకు యాంత్రిక పరిజ్ఞ్యానం (Engineering aspects of mooring for offshore cage farming of finfishes)

Cage culture has been demonstrated as a suitable tool to enhance marine fish production in coastal areas by Central Marine Fisheries Research Institute in recent years. Cage farming fully depends on the cage stability in the sea considering the rough weather conditions throughout the seasons which differs from place to place. The design and installation of offshore cage needs basic understanding on their behavior in actual sea conditions. As a cage system operates in open sea, it is subjected to currents, waves and winds. The mooring and anchoring system helps to keep the cage in sea against drifting

Integration of seaweed (Kappaphycus alvarezii) and pearl oyster (Pinctada fucata) along with Asian seabass (Lates calcarifer) in open sea floating cage off Andhra Pradesh coast

Aquaculture is growing very fast and its growth is expected to continue and it is necessary to supply fish for the ever growing population of our country. In India, fish production and consumption is considered to be important and needs to be promoted. As capture fisheries have almost become stagnant, diversification of aquaculture is highly necessary. Considering the limited scope of freshwater aquaculture and the availability of vast coastline, open sea cage culture gained importance in the present day mariculture practice. Open sea floating cage culture is an alternative sustainable practice for rearing fish and shellfish species and polyculture along with seaweeds may also improve profitability and sustainability. Open sea cage culture is an aquaculture production system where high density of fish is cultured in floating cages. Floating cages are widely used in commercial aquaculture and individual cage units of desired shapes and sizes can be tailored to suit the needs

ఆర్ధిక రంగములో బహిరంగ సముద్ర జలాల్లో తేలియాడే కేజులో చేపలసాగు (Economics of open sea floating cage culture of finfishes)

Considering the opportunities for increasing mariculture production in India, cage culture offers the farmers and entrepreneurs with the scope to lay the idle resources of Bay of Bengal and Arabian Sea for a productive use. However the adoption of any technology depends upon its economic performance. The rate of return per rupee invested is the economic indicator that guides the investor to invest in the particular activity

Different aspects of cage culture management for sustainable fish production

A technological intervention has been the major impetus for the rapid development of cage farming of marine fishes across the world. In spite of the various technologies available for the fulfilment of high production and proper installation of the cages, it is necessary to optimise the many factors periodically to avoid the adverse impact of environmental and ecological factors for long maintenance of cages and also to maintain the healthy animals in the cage. In this context, monitoring plays vital role in any type of mariculture activity. Therefore, a well conceived and designed monitoring programme is needed to promote good growth of fishes and to obtain optimal production in a sustainable manner from cages. Cage monitoring is an integral part of the cage culture and it should be continued starting from the installation of the cage to till harvesting the fishes. The following are the major aspects where the cage monitoring is essential and it includes maintenance of cage and its accessories, stocking of the fish, feeding, fish husbandry, health management, water quality and harvesting

కేజు సాగు పై నివేదిక (Overview of cage culture)

Cage farming in brackish and inshore waters in Asia is relatively recent, being started in Japan. It is estimated that over 95 percent of marine finfish aquaculture is in cages. Cage farming is most dominant in East and Southeast Asia, but not in South Asian nations. In India, cage culture started recently by CMFRI and it has demonstrated along the Indian coast for culturing different species such as Sea bass (Lates calcarifer), Lobster, Cobia etc to the farmer

आँध्रप्रदेश में विशाखपट्टणम तट पर समुद्री शैवाल काप्पाफाईककस जातियों का समुद्री संवर्धन - संभावनाएं और प्रत्याशाएं

आँध्रप्रदेश में विशाखपट्टणम तट पर समुद्री शैवाल काप्पाफाईककस जातियों का समुद्री संवर्धन - संभावनाएं और प्रत्याशाए

చేపలను కేజులో సాగు చేయు విధానం (Cage culture of finfishes). CMFRI Training Manual Series No. 8/2016.

Training manual on “Cage Culture of Finfishes - Telugu” is published by the Central Marine Fisheries Research Institute, Visakhapatnam Regional Centre, Andhra Pradesh. This manual is published as reading material in the training programme on cage culture of finfishes for fishermen, aquafarmers and entrepreneurs involved in mariculture activities in telugu. This manual is consisting of different chapters which describe various aspects related to open sea cages

Engineering aspects of cage design, mooring and net design for open sea cage farming in India

Cage is an aquaculture production structure comprising of a rigid floating frame, flexible net materials and mooring system (synthetic mooring rope, buoy and anchor) with a round or square shape floating net pen to hold and culture large number of fishes and other aquatic resources which can be installed in reservoir, river, lake or sea. The design and operating variables in engineering aspects of an open sea cage is of great concern in mariculture operations as they are installed in exposed sites in the off shore areas. The design of the cage and its accessories is specially made in agreement to the individual farmer’s requirements. A well engineered cage design will provide the opportunity to reduce the cost of the cages. HDPE material is found to be suitable to make cage frame for open sea cages. The HDPE float frames installed in open unprotected water can withstand wave conditions. Round cage (volume depends on diameter) with floatation system made of butt-welded HDPE pipes, designed for the culture of fishes such as milkfish, mullet, cobia or pompano, sea bass and lobsters, and this very well used in many countries