Nepal - Cage culture of fish (carps) in Nepal. A report prepared for the integrated fisheries and fish culture development project
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Work carried out on the culture of fish in cages in Nepal, the introduction of the practice to private fishermen by the project and its technical and economic aspects are described in this report. A variety of cages were tried, their relative advantages and disadvantages and costs are provided. The species tried were mainly silver carp and grass carp and they have proved to be economical because of the relatively low or negligible feed costs involved. Rohu and common carp yield additional inci dental production when stocked in small numbers with the above species. Preliminary experiments on the culture of bighead carp in cages have also been very encouraging. An explanation for different growth rates observed of planktivorous species in the three lakes of the Pokhara Valley is provided on the basis of limnological data and qualitative and quantitative studies of plankton, as well as stomach content studies. The economics of cage culture with these species is discussed. The results are compared with those obtained with other species in other countries. Suggestions are provided for future work, including variations of stocking densities. The possible initial increase in fish production in the Pokhara Valley through cagefish culture is indicated. Recommendations for the future are also provided.