पिंजरा मछ्ली पालन केलिए प्लवकी खाद्य का निर्माण

कृपया पूरा लेखा पढ

गुजरात के सूत्रपादा और दिऊ के घोघला में समुद्री पिंजरों में शूली महाचिंगट पानुलिरस पोलिफागस का पालन

Sea cage culture of spiny lobster Panulirus polyfagus at Sutrapada, Gujarat and Di

Artificial Reefs and its Importance in Marine Fisheries Management

Nowadays the need for artificial reefs is growing in India, since the fishery resources of the inshore areas are being intensively exploited. There is a considerable increase in the fishing effort, especially by mechanised vessels all along the Indian coast. Heavy competition among different kinds of fishing vessels has led to reduced incomes and moreover, in a multi species fishery, management measures like seasonal fishing ban adopted for conservation will have a limited effect. In this context, artificial reefs as a device for increasing the fish biomass gets importance

Introduction to Recirculating Aquaculture System

Recirculation aquaculture is essentially a technology for farming fish or other aquatic organisms by reusing the water in the production. The technology is based on the use of mechanical and biological filters, and the method can in principle be used for any species grown in aquaculture such as fish, shrimps, clams, etc. Recirculation technology is, however, primarily used in fish farming. Recirculation is growing rapidly in many areas of the fish farming sector, and systems are deployed in production units that vary from huge plants generating many tonnes of fish per year for consumption to small sophisticated systems used for restocking or to save endangered species

पिंजरों में मछली पालन की भौगोलिक स्थिति – एक अवलोकन

कृपया पूरा लेखा पढ

Tuna fish waste as an aquafeed substitute at Visakhapatnam

Tuna is an important group of large pelagics in the waters along the Visakhapatnam coast and constitute a major component of the exploited marine fishery resources. The annual average landings of tunas in Andhra Pradesh during 2006 -2010 was 29,360 t, which accounts for 26.4% of the national tuna catch. The highest catch of 32,369 t was recorded in 2009 and the lowest catch of 27,046 t was recorded in 2006. Visakhapatnam alone contributes to half the total tuna catch for the state. The tuna fishery at Visakhapatnam is contributed mainly by Euthynnus affinis and Thunnus albacares with small amounts of Katsuwonus pelamis and Auxis thazard. They are mainly exploited by hooks and line and by gillnets. They are locally called ‘suralu’ and support a regular fishery. Visakhapatnam is the major fishing harbour where tuna fish is brought from different landing centres and transported for export

Length weight relationship and condition factor of Penaeus monodon (Fabricius, 1798) from Digha coast, West Bengal, India

The Indian Tiger prawn Penaeus monodon Fabricius 1798 is the largest species among the penaeid prawns and is commonly known as “Jumbo Tiger Prawn” in the Indo-Pacific region (Rao, 2013) [23]. In West Bengal it is known as Bagda chingdi. It is widely distributed in the Indian waters but forms a substantial component of the prawn landings from the sea and the estuaries of the east coast. P. monodon has been recorded in all the maritime states of India (Mohamed, 1970) [18]

Probiotics as nutrient supplement in artificial feed of gold fish (Carassius auratus)

Ornamental fish culture is an important component of aquaculture industry and is one of the most economic and profitable areas of fish farming activities. The last four decades has witnessed considerable growth and diversification in the international trade in ornamental fishes. Gold fish, Carassius auratus (Linnaeus, 1758), a member of the cyprinidae family is one of the most popular aquarium fish and are extremely valuable commercially. Goldfish are not having only attractive colour but also are hardy and easy to culture, so they make excellent aquarium species as well . as laboratory species. Moreover, their hardiness and ready availability give them scientific value for genetic and physiological research also

Assessment of nitrogen and sulphur cycle bacteria and shrimp production in ponds treated with biological products

Objective: To study the influence of biological products on the levels of nitrogen and sulphur cycle bacteria in shrimp culture systems of West Bengal, India. Methods: The pond water and sediment samples were analyzed for physico-chemical parameters as per standard methods. The bacteria involved in ammonification, nitrification, denitrification, sulphate reduction and sulphur oxidation were enumerated by most probable number technique. Results: The semi-intensive and modified extensive shrimp farms used a variety of biological products during various stages of production. No biological products were used in traditional farms. The water and sediment samples of modified extensive system recorded significantly higher mean heterotrophic bacterial counts. The counts of ammonia, nitrite and sulphur oxidizers, and nitrate and sulphate reducers varied among the systems. The cycling of nitrogen and sulphur appeared to be affected with the intensification of culture practices. Conclusions: The application of biological products in certain systems helped to maintain the bacteria involved in nitrogen and sulphur cycles and safe levels of ammonia, nitrite and nitrate. An assessment of these metabolically active bacteria in shrimp culture ponds and the application of right kind microbial products would help ameliorate the organic pollution in shrimp aquaculture