Abstract:

Cage culture of fish in Nepal began in Lake Phewa in 1972. At present, three lakes in Pokhara Valley are being used for this purpose, Lakes Phewa, Begnas and Rupa. The major species are planktivorous fishes, Aristichthys nobilis and Hypophthalmicthsy molitrix, which are raised in floating cages, usually of nylon or polyethylene, without supplemental feeding.
Fish stocking density varies with the trophic state of the lake; in Lake Phewa, 6 fish•m-^₃ and in Lakes Begnas and Rupa, 10 fish•m-^₃. Annual production rates per m^₃ are 3.4 kg in Lake Phewa, 4.7 kg in Lake Begnas and 5.0 kg in Lake Rupa. Mortality during the production period is about 5%.
A five-cage system has proven to be sufficient additional work for one fisher family and can add Nepali Rupees 9,000-14,000 to their annual income. Cage culture faces several constraints, especially the shortage of fingerlings. A hatchery facility and technical support are needed to expand and intensify cage fish culture in the Pokhara Valley.

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Date 1992/04/01

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