At the end of the August inorganic fertilizer, Urea-25kg and MOP-15Kg was applied again in the paddy plots. In the first week of October, paddy and fishes were harvested. The total paddy cultivation period was 150 days and fish culture of 100days.No supplementary feed was provided for feeding of fish and the feeding was entirely dependent on the natural food available in the paddy plots. A total of 1220 nos of fishes were harvested of varying size of 9cm to 14cm and 100gm to 300gm of weight in 100 days of culture period in the paddy field with 81% survibility. A total of 208 kg of fish was harvested @ 560 kg/ha. Paddy of 2.22 ton of was harvested from the plot @ 6.0 ton/ha. Rs14, 000/- was generated from the paddy cultivation, whereas an additional income of Rs 15,000/- was generated from fish culture in the paddy field without any additional expenditure for inputs for fish farming except fish seed.
Figure: A rice-fish farming system in hills of Manipur
Another demonstration was undertaken at Purulvillage of Senapati districts of Manipur which comes under hill (Figure 3). An area of 2500m2 of cultivableterrace plot was taken for paddy-fish farming. The peripheral dyke height of the paddy plot was 1.5 ft where circular refuge of 1.5m dia and 1m depth was constructed for fish shelter. Local paddy variety Ruoraiwas transplanted in the paddy field.Other farmers of the nearby paddy plots have transplanted paddy varieties like, Kithou,Riikhamairuand Dziikaorou etc. in paddy-fish farming systems.1000 nos. of Common carp, Cyprinuscarpio fry at the stocking density of 4000 nos/ha of 5.4+0.2cm in size and 7.3+0.4gminweight was stocked. Manuring was done as per the standard local practice.No supplementary feed was provided for feeding of fish and the feeding was entirely dependent on the natural food available in the paddy plots.Paddy cultivation was for 150 days. However, fish cultivation was for 270 days, because the fish cultivation was continued for another 120 days after the paddy harvest to have a better growth. A total of 680 nos of fishes were harvested of varying size of 20 +0.5cm and 520.5+2.3gm of weight with 68% survibility. A total of 354Kg of fish was harvested @ 1416Kg/ha. Paddy of 1.5 ton of was harvested from the plot @ 6.0 ton/ha. Rs 9,375/- was generated from the paddy cultivation, whereas an additional income of Rs 24,780/- was generated from fish culture in the paddy field without any additional expenditure for inputs for fish farming except fish seed.
2. Induced breeding of climbing perch, Anabas testudineus (Ukabi) for conservation and aqua culture in Manipur
Climbing perch Anabas testudineus locally called as ‘Ukabi’ is a small sized food fish in Manipur. This fish exhibits obligatory air-gulping behavior and omnivorous in habit. Climbing perch appear to be visual feeders, feeding primarily during the day. The fish has a wide range of distribution in the fresh waters and is prevalent in the derelict and swampy waters. Because of reduced abundance in the wild fish is presently categorized as vulnerable. Although culture, breeding and larval rearing technology of the major carps has been developed for the decades, other species having commercial importance like Anabas testudineus have been ignored. Among air breathing fishes A. testudineus is considered a delicacy in the eastern and north eastern India and demand for this fish is very high for its prolonged freshness out of water and a valuable diet for sick and convalescent. The present market value ranged from Rs. 300 to 400 per kg in Manipur.
The first reports concerning attempts at artificial hypo phyation of climbing perch, Anabas testudineus were published in the 1970s. But, there is no report regarding induced breeding of Climbing perch from Manipur. A successful attempt for the first time has been made by the group of fishery scientist namely; Pronob Das, B. K. Behera, N. Sorangmba and B. Singh from Manipur for induce breeding of Climbing perch with synthetic hormone forconservationandaquaculture. The technology is available with KVK (IW), ICAR Research Complex for NEH Region, Manipur Centre, Imphal. Seed will be available in commercial scale from coming year (2009) from our centre.