Along the 5,600 km coastline of India, about 1.42 ill ha of saline tract is available for development of brackishwater aquaculture. Apart from the utilisation of this vast unproductive fallow swampy land for increasing fish production, the brackishwater aquaculture entails the culture and production of prawn, a high priced commodity having universal demand for earning foreign exchange. The production of prawns from the marine source is already showing declining trends. Therefore, to meet this high demand in the overseas markets, it is imperative to develop and exploit the huge potential of the brackishwater resources of the country. At present an estimated 50,000 ha of brackishwater area is under traditional system of fish farming in the maritime states. In the traditional trapping-holding-growing operation, the average yield of fish & prawn is 200 kgfhafyr. Moreover, due to diverse ecological conditions and soil characteristics, yield from different places are highly variable.
To encounter all the limiting factors related to traditional culture system and suitably modulate the ecosystem for culture needs, selective stocking of compatible species having judicious choice of size and number, proper use of manures and fertilizers to enhance the fertility status, adoption of supplemental feeding for better growth and survival and maintenance of fish pond hygiene by periodic flushing of metabolities as devices of controlled farming were sought to be established and this ultimately came into being at an experimental fish farm in West Bengal at Kakdwip in 1968. With the encouraging results obtained from the experimental fish farm at Kakdwip and from the coordinated project centres established in the east and west coasts of the country, the brackishwater aquaculture techniques so far been developed for propagation are presented in the following chapters.
One of the important pre-requisite for undertaking brackishwater aquaculture is the selection of suitable site. The site has to be selected by taking into consideration topography, soil type, tidal fluctuation, wave action, flood drainage, cyclonic hazards, seed abundance and other ecological, biological and environmental factors…read more
In the selected sites, pond, areas from 0.5 ha and above are to be excavated to hold a water depth of 80-180 em. Peripheral dykes are to be constructed with compact soil to withstand external tidal pressure during spring tide period…read more
During the last two decades investigations were undertaken to assess brackishwater seed resources along the east and west coast of the country…read more
Based on scientific farming principles, production systems which have attained the status of technology and are suitable for large scale adoption in the country..read more
Supplementary feeding is one of the important and essential part of the brackishwater aquaculture technology for maintaining the growth of the stocked fish and prawn..read more
The physical, chemical and biological factors of brackishwater fish pond have individual as well as synergic effect on the dynamics of brackishwater aquaculture..read more
In brackish water aquaculture fish diseases are not so commonly encountered as in fresh water aquaculture. Diseases of fin and shell-fishes recorded from brackishwater impoundments are as follows…read more
Harvesting procedure of brackishwater fish and prawn is different from that of freshwater fishes. Partial draining of fish pond is to be done before netting…read more
- Central Inland Fisheries Research Institute, Barrackpore